./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/list-simple/sll2n_append_equal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 551b0097 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/list-simple/sll2n_append_equal.i -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f218eac2d2b52810cb44bb8b3f3f80463ec7e46c8818b20f079ed947cc8e9fd0 --- Real Ultimate output --- This is Ultimate 0.3.0-?-551b009-m [2025-01-09 22:43:11,347 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-01-09 22:43:11,396 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-01-09 22:43:11,399 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-01-09 22:43:11,399 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-01-09 22:43:11,411 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-01-09 22:43:11,412 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-01-09 22:43:11,412 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-01-09 22:43:11,412 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-01-09 22:43:11,412 INFO L153 SettingsManager]: * Use memory slicer=true [2025-01-09 22:43:11,412 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-01-09 22:43:11,412 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-01-09 22:43:11,413 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-01-09 22:43:11,413 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-01-09 22:43:11,413 INFO L153 SettingsManager]: * Use SBE=true [2025-01-09 22:43:11,413 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-01-09 22:43:11,413 INFO L153 SettingsManager]: * sizeof long=4 [2025-01-09 22:43:11,413 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-01-09 22:43:11,413 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-01-09 22:43:11,413 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-01-09 22:43:11,413 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-01-09 22:43:11,413 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-01-09 22:43:11,414 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-01-09 22:43:11,414 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-01-09 22:43:11,414 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-01-09 22:43:11,414 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-01-09 22:43:11,414 INFO L153 SettingsManager]: * sizeof long double=12 [2025-01-09 22:43:11,414 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-01-09 22:43:11,414 INFO L153 SettingsManager]: * Use constant arrays=true [2025-01-09 22:43:11,414 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-01-09 22:43:11,414 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-09 22:43:11,414 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-09 22:43:11,414 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-09 22:43:11,414 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 22:43:11,415 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-01-09 22:43:11,415 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-09 22:43:11,415 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-09 22:43:11,415 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-09 22:43:11,415 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 22:43:11,415 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-01-09 22:43:11,415 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-01-09 22:43:11,415 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-01-09 22:43:11,415 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-01-09 22:43:11,415 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-01-09 22:43:11,415 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-01-09 22:43:11,415 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-01-09 22:43:11,415 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-01-09 22:43:11,416 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) 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 -> f218eac2d2b52810cb44bb8b3f3f80463ec7e46c8818b20f079ed947cc8e9fd0 [2025-01-09 22:43:11,586 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-01-09 22:43:11,591 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-01-09 22:43:11,593 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-01-09 22:43:11,593 INFO L270 PluginConnector]: Initializing CDTParser... [2025-01-09 22:43:11,594 INFO L274 PluginConnector]: CDTParser initialized [2025-01-09 22:43:11,594 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-simple/sll2n_append_equal.i [2025-01-09 22:43:12,717 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/20b82dd8b/7f62fc45eb634f7c85875c3ad65a1981/FLAG8f4bfe58a [2025-01-09 22:43:12,987 INFO L384 CDTParser]: Found 1 translation units. [2025-01-09 22:43:12,988 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/list-simple/sll2n_append_equal.i [2025-01-09 22:43:12,999 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/20b82dd8b/7f62fc45eb634f7c85875c3ad65a1981/FLAG8f4bfe58a [2025-01-09 22:43:13,283 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/20b82dd8b/7f62fc45eb634f7c85875c3ad65a1981 [2025-01-09 22:43:13,285 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-01-09 22:43:13,286 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-01-09 22:43:13,287 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-01-09 22:43:13,287 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-01-09 22:43:13,290 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-01-09 22:43:13,290 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 10:43:13" (1/1) ... [2025-01-09 22:43:13,291 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b6fd936 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:43:13, skipping insertion in model container [2025-01-09 22:43:13,291 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 10:43:13" (1/1) ... [2025-01-09 22:43:13,312 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-01-09 22:43:13,526 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-09 22:43:13,534 INFO L200 MainTranslator]: Completed pre-run [2025-01-09 22:43:13,576 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-09 22:43:13,599 INFO L204 MainTranslator]: Completed translation [2025-01-09 22:43:13,601 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:43:13 WrapperNode [2025-01-09 22:43:13,601 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-01-09 22:43:13,602 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-01-09 22:43:13,602 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-01-09 22:43:13,603 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-01-09 22:43:13,607 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:43:13" (1/1) ... [2025-01-09 22:43:13,617 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:43:13" (1/1) ... [2025-01-09 22:43:13,633 INFO L138 Inliner]: procedures = 127, calls = 34, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 116 [2025-01-09 22:43:13,635 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-01-09 22:43:13,635 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-01-09 22:43:13,636 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-01-09 22:43:13,636 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-01-09 22:43:13,641 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:43:13" (1/1) ... [2025-01-09 22:43:13,642 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:43:13" (1/1) ... [2025-01-09 22:43:13,649 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:43:13" (1/1) ... [2025-01-09 22:43:13,662 INFO L175 MemorySlicer]: Split 17 memory accesses to 3 slices as follows [2, 6, 9]. 53 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1, 0]. The 5 writes are split as follows [0, 1, 4]. [2025-01-09 22:43:13,664 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:43:13" (1/1) ... [2025-01-09 22:43:13,664 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:43:13" (1/1) ... [2025-01-09 22:43:13,668 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:43:13" (1/1) ... [2025-01-09 22:43:13,672 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:43:13" (1/1) ... [2025-01-09 22:43:13,676 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:43:13" (1/1) ... [2025-01-09 22:43:13,677 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:43:13" (1/1) ... [2025-01-09 22:43:13,678 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:43:13" (1/1) ... [2025-01-09 22:43:13,679 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-01-09 22:43:13,683 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-01-09 22:43:13,683 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-01-09 22:43:13,683 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-01-09 22:43:13,684 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:43:13" (1/1) ... [2025-01-09 22:43:13,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 22:43:13,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 22:43:13,711 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-01-09 22:43:13,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-01-09 22:43:13,728 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-01-09 22:43:13,728 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-01-09 22:43:13,728 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-01-09 22:43:13,728 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-01-09 22:43:13,728 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-01-09 22:43:13,729 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2025-01-09 22:43:13,729 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2025-01-09 22:43:13,729 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2025-01-09 22:43:13,729 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-01-09 22:43:13,729 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-01-09 22:43:13,729 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-01-09 22:43:13,729 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2025-01-09 22:43:13,729 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2025-01-09 22:43:13,729 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2025-01-09 22:43:13,729 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2025-01-09 22:43:13,729 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2025-01-09 22:43:13,729 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2025-01-09 22:43:13,729 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-01-09 22:43:13,729 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2025-01-09 22:43:13,730 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2025-01-09 22:43:13,730 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2025-01-09 22:43:13,730 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-01-09 22:43:13,730 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-01-09 22:43:13,730 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-01-09 22:43:13,730 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-01-09 22:43:13,730 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-01-09 22:43:13,834 INFO L234 CfgBuilder]: Building ICFG [2025-01-09 22:43:13,835 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-01-09 22:43:14,039 INFO L? ?]: Removed 97 outVars from TransFormulas that were not future-live. [2025-01-09 22:43:14,040 INFO L283 CfgBuilder]: Performing block encoding [2025-01-09 22:43:14,048 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-01-09 22:43:14,049 INFO L312 CfgBuilder]: Removed 1 assume(true) statements. [2025-01-09 22:43:14,049 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 10:43:14 BoogieIcfgContainer [2025-01-09 22:43:14,050 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-01-09 22:43:14,051 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-01-09 22:43:14,051 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-01-09 22:43:14,054 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-01-09 22:43:14,054 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.01 10:43:13" (1/3) ... [2025-01-09 22:43:14,055 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c7fb3ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 10:43:14, skipping insertion in model container [2025-01-09 22:43:14,056 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:43:13" (2/3) ... [2025-01-09 22:43:14,056 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c7fb3ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 10:43:14, skipping insertion in model container [2025-01-09 22:43:14,056 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 10:43:14" (3/3) ... [2025-01-09 22:43:14,057 INFO L128 eAbstractionObserver]: Analyzing ICFG sll2n_append_equal.i [2025-01-09 22:43:14,071 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-01-09 22:43:14,072 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG sll2n_append_equal.i that has 2 procedures, 87 locations, 1 initial locations, 4 loop locations, and 33 error locations. [2025-01-09 22:43:14,106 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-01-09 22:43:14,114 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;@1967d54a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-01-09 22:43:14,116 INFO L334 AbstractCegarLoop]: Starting to check reachability of 33 error locations. [2025-01-09 22:43:14,119 INFO L276 IsEmpty]: Start isEmpty. Operand has 87 states, 50 states have (on average 1.86) internal successors, (93), 83 states have internal predecessors, (93), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-01-09 22:43:14,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2025-01-09 22:43:14,124 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 22:43:14,125 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-01-09 22:43:14,125 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-01-09 22:43:14,129 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 22:43:14,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1809902837, now seen corresponding path program 1 times [2025-01-09 22:43:14,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 22:43:14,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337293593] [2025-01-09 22:43:14,136 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:43:14,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 22:43:14,191 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-01-09 22:43:14,209 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-01-09 22:43:14,211 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:43:14,211 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:43:14,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 22:43:14,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 22:43:14,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337293593] [2025-01-09 22:43:14,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337293593] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 22:43:14,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 22:43:14,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-01-09 22:43:14,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399915263] [2025-01-09 22:43:14,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 22:43:14,286 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-01-09 22:43:14,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 22:43:14,302 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-01-09 22:43:14,302 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-01-09 22:43:14,304 INFO L87 Difference]: Start difference. First operand has 87 states, 50 states have (on average 1.86) internal successors, (93), 83 states have internal predecessors, (93), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 22:43:14,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 22:43:14,367 INFO L93 Difference]: Finished difference Result 84 states and 91 transitions. [2025-01-09 22:43:14,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-01-09 22:43:14,369 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2025-01-09 22:43:14,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 22:43:14,372 INFO L225 Difference]: With dead ends: 84 [2025-01-09 22:43:14,373 INFO L226 Difference]: Without dead ends: 81 [2025-01-09 22:43:14,374 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-01-09 22:43:14,375 INFO L435 NwaCegarLoop]: 84 mSDtfsCounter, 2 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-09 22:43:14,376 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 136 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-09 22:43:14,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2025-01-09 22:43:14,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2025-01-09 22:43:14,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 47 states have (on average 1.7659574468085106) internal successors, (83), 77 states have internal predecessors, (83), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-01-09 22:43:14,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 87 transitions. [2025-01-09 22:43:14,398 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 87 transitions. Word has length 7 [2025-01-09 22:43:14,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 22:43:14,398 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 87 transitions. [2025-01-09 22:43:14,398 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 22:43:14,399 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 87 transitions. [2025-01-09 22:43:14,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2025-01-09 22:43:14,399 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 22:43:14,399 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-01-09 22:43:14,399 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-01-09 22:43:14,399 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-01-09 22:43:14,400 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 22:43:14,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1809902838, now seen corresponding path program 1 times [2025-01-09 22:43:14,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 22:43:14,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69443854] [2025-01-09 22:43:14,400 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:43:14,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 22:43:14,406 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-01-09 22:43:14,431 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-01-09 22:43:14,432 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:43:14,432 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:43:14,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 22:43:14,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 22:43:14,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69443854] [2025-01-09 22:43:14,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69443854] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 22:43:14,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 22:43:14,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-01-09 22:43:14,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725774246] [2025-01-09 22:43:14,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 22:43:14,500 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-01-09 22:43:14,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 22:43:14,500 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-01-09 22:43:14,500 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-01-09 22:43:14,500 INFO L87 Difference]: Start difference. First operand 81 states and 87 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 22:43:14,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 22:43:14,543 INFO L93 Difference]: Finished difference Result 79 states and 85 transitions. [2025-01-09 22:43:14,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-01-09 22:43:14,543 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2025-01-09 22:43:14,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 22:43:14,544 INFO L225 Difference]: With dead ends: 79 [2025-01-09 22:43:14,544 INFO L226 Difference]: Without dead ends: 79 [2025-01-09 22:43:14,544 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-01-09 22:43:14,545 INFO L435 NwaCegarLoop]: 81 mSDtfsCounter, 2 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-09 22:43:14,545 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 135 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-09 22:43:14,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2025-01-09 22:43:14,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2025-01-09 22:43:14,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 47 states have (on average 1.7234042553191489) internal successors, (81), 75 states have internal predecessors, (81), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-01-09 22:43:14,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 85 transitions. [2025-01-09 22:43:14,553 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 85 transitions. Word has length 7 [2025-01-09 22:43:14,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 22:43:14,553 INFO L471 AbstractCegarLoop]: Abstraction has 79 states and 85 transitions. [2025-01-09 22:43:14,553 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 22:43:14,553 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 85 transitions. [2025-01-09 22:43:14,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2025-01-09 22:43:14,554 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 22:43:14,554 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 22:43:14,554 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-01-09 22:43:14,554 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-01-09 22:43:14,554 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 22:43:14,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1704645956, now seen corresponding path program 1 times [2025-01-09 22:43:14,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 22:43:14,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515622056] [2025-01-09 22:43:14,555 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:43:14,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 22:43:14,563 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-01-09 22:43:14,573 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-01-09 22:43:14,573 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:43:14,573 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:43:14,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 22:43:14,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 22:43:14,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515622056] [2025-01-09 22:43:14,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515622056] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 22:43:14,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 22:43:14,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-01-09 22:43:14,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449379927] [2025-01-09 22:43:14,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 22:43:14,642 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-01-09 22:43:14,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 22:43:14,643 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-01-09 22:43:14,643 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-01-09 22:43:14,643 INFO L87 Difference]: Start difference. First operand 79 states and 85 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-01-09 22:43:14,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 22:43:14,737 INFO L93 Difference]: Finished difference Result 78 states and 84 transitions. [2025-01-09 22:43:14,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-01-09 22:43:14,739 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2025-01-09 22:43:14,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 22:43:14,740 INFO L225 Difference]: With dead ends: 78 [2025-01-09 22:43:14,740 INFO L226 Difference]: Without dead ends: 78 [2025-01-09 22:43:14,740 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-01-09 22:43:14,741 INFO L435 NwaCegarLoop]: 76 mSDtfsCounter, 2 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-09 22:43:14,741 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 253 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-09 22:43:14,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2025-01-09 22:43:14,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2025-01-09 22:43:14,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 47 states have (on average 1.702127659574468) internal successors, (80), 74 states have internal predecessors, (80), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-01-09 22:43:14,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 84 transitions. [2025-01-09 22:43:14,744 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 84 transitions. Word has length 13 [2025-01-09 22:43:14,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 22:43:14,745 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 84 transitions. [2025-01-09 22:43:14,745 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-01-09 22:43:14,745 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 84 transitions. [2025-01-09 22:43:14,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2025-01-09 22:43:14,745 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 22:43:14,745 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 22:43:14,745 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-01-09 22:43:14,745 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-01-09 22:43:14,746 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 22:43:14,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1704645955, now seen corresponding path program 1 times [2025-01-09 22:43:14,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 22:43:14,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037370447] [2025-01-09 22:43:14,746 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:43:14,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 22:43:14,752 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-01-09 22:43:14,756 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-01-09 22:43:14,756 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:43:14,756 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:43:14,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 22:43:14,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 22:43:14,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037370447] [2025-01-09 22:43:14,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037370447] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 22:43:14,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 22:43:14,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-01-09 22:43:14,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421247339] [2025-01-09 22:43:14,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 22:43:14,858 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-01-09 22:43:14,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 22:43:14,858 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-01-09 22:43:14,858 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-01-09 22:43:14,858 INFO L87 Difference]: Start difference. First operand 78 states and 84 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-01-09 22:43:14,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 22:43:14,950 INFO L93 Difference]: Finished difference Result 77 states and 83 transitions. [2025-01-09 22:43:14,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-01-09 22:43:14,951 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2025-01-09 22:43:14,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 22:43:14,952 INFO L225 Difference]: With dead ends: 77 [2025-01-09 22:43:14,952 INFO L226 Difference]: Without dead ends: 77 [2025-01-09 22:43:14,952 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-01-09 22:43:14,952 INFO L435 NwaCegarLoop]: 76 mSDtfsCounter, 1 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-09 22:43:14,953 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 269 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-09 22:43:14,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2025-01-09 22:43:14,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2025-01-09 22:43:14,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 47 states have (on average 1.6808510638297873) internal successors, (79), 73 states have internal predecessors, (79), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-01-09 22:43:14,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 83 transitions. [2025-01-09 22:43:14,956 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 83 transitions. Word has length 13 [2025-01-09 22:43:14,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 22:43:14,956 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 83 transitions. [2025-01-09 22:43:14,956 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-01-09 22:43:14,956 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 83 transitions. [2025-01-09 22:43:14,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2025-01-09 22:43:14,957 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 22:43:14,957 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 22:43:14,957 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-01-09 22:43:14,957 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-01-09 22:43:14,957 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 22:43:14,958 INFO L85 PathProgramCache]: Analyzing trace with hash 87981918, now seen corresponding path program 1 times [2025-01-09 22:43:14,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 22:43:14,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139130057] [2025-01-09 22:43:14,958 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:43:14,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 22:43:14,965 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-01-09 22:43:14,967 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-01-09 22:43:14,967 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:43:14,967 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:43:15,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 22:43:15,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 22:43:15,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139130057] [2025-01-09 22:43:15,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139130057] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 22:43:15,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 22:43:15,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-01-09 22:43:15,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992384844] [2025-01-09 22:43:15,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 22:43:15,021 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-01-09 22:43:15,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 22:43:15,021 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-01-09 22:43:15,021 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-01-09 22:43:15,021 INFO L87 Difference]: Start difference. First operand 77 states and 83 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-01-09 22:43:15,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 22:43:15,028 INFO L93 Difference]: Finished difference Result 82 states and 89 transitions. [2025-01-09 22:43:15,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-01-09 22:43:15,029 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2025-01-09 22:43:15,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 22:43:15,029 INFO L225 Difference]: With dead ends: 82 [2025-01-09 22:43:15,029 INFO L226 Difference]: Without dead ends: 82 [2025-01-09 22:43:15,029 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-01-09 22:43:15,030 INFO L435 NwaCegarLoop]: 81 mSDtfsCounter, 3 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-09 22:43:15,030 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 159 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-09 22:43:15,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2025-01-09 22:43:15,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 78. [2025-01-09 22:43:15,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 48 states have (on average 1.6666666666666667) internal successors, (80), 74 states have internal predecessors, (80), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-01-09 22:43:15,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 84 transitions. [2025-01-09 22:43:15,036 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 84 transitions. Word has length 14 [2025-01-09 22:43:15,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 22:43:15,036 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 84 transitions. [2025-01-09 22:43:15,036 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-01-09 22:43:15,037 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 84 transitions. [2025-01-09 22:43:15,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2025-01-09 22:43:15,037 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 22:43:15,037 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 22:43:15,037 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-01-09 22:43:15,037 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-01-09 22:43:15,038 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 22:43:15,038 INFO L85 PathProgramCache]: Analyzing trace with hash -1907182772, now seen corresponding path program 1 times [2025-01-09 22:43:15,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 22:43:15,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847586765] [2025-01-09 22:43:15,038 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:43:15,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 22:43:15,056 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-01-09 22:43:15,063 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-01-09 22:43:15,064 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:43:15,064 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:43:15,129 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-01-09 22:43:15,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 22:43:15,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847586765] [2025-01-09 22:43:15,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847586765] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 22:43:15,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425271986] [2025-01-09 22:43:15,129 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:43:15,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:43:15,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 22:43:15,134 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 22:43:15,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-01-09 22:43:15,198 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-01-09 22:43:15,221 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-01-09 22:43:15,222 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:43:15,222 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:43:15,223 INFO L256 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-01-09 22:43:15,226 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 22:43:15,254 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 22:43:15,254 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 22:43:15,282 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-01-09 22:43:15,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425271986] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 22:43:15,282 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 22:43:15,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2025-01-09 22:43:15,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182736009] [2025-01-09 22:43:15,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 22:43:15,283 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-01-09 22:43:15,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 22:43:15,283 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-01-09 22:43:15,283 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2025-01-09 22:43:15,283 INFO L87 Difference]: Start difference. First operand 78 states and 84 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2025-01-09 22:43:15,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 22:43:15,296 INFO L93 Difference]: Finished difference Result 83 states and 90 transitions. [2025-01-09 22:43:15,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-01-09 22:43:15,296 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 26 [2025-01-09 22:43:15,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 22:43:15,297 INFO L225 Difference]: With dead ends: 83 [2025-01-09 22:43:15,297 INFO L226 Difference]: Without dead ends: 83 [2025-01-09 22:43:15,297 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2025-01-09 22:43:15,297 INFO L435 NwaCegarLoop]: 81 mSDtfsCounter, 3 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-09 22:43:15,298 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 235 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-09 22:43:15,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2025-01-09 22:43:15,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2025-01-09 22:43:15,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 52 states have (on average 1.6153846153846154) internal successors, (84), 78 states have internal predecessors, (84), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-01-09 22:43:15,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 90 transitions. [2025-01-09 22:43:15,301 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 90 transitions. Word has length 26 [2025-01-09 22:43:15,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 22:43:15,301 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 90 transitions. [2025-01-09 22:43:15,301 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2025-01-09 22:43:15,301 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 90 transitions. [2025-01-09 22:43:15,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2025-01-09 22:43:15,301 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 22:43:15,301 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 22:43:15,311 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-01-09 22:43:15,502 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:43:15,502 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-01-09 22:43:15,502 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 22:43:15,502 INFO L85 PathProgramCache]: Analyzing trace with hash -243109318, now seen corresponding path program 2 times [2025-01-09 22:43:15,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 22:43:15,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936300342] [2025-01-09 22:43:15,503 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 22:43:15,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 22:43:15,516 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 38 statements into 2 equivalence classes. [2025-01-09 22:43:15,528 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 38 of 38 statements. [2025-01-09 22:43:15,528 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 22:43:15,528 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:43:15,894 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-01-09 22:43:15,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 22:43:15,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936300342] [2025-01-09 22:43:15,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936300342] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 22:43:15,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848976432] [2025-01-09 22:43:15,895 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 22:43:15,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:43:15,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 22:43:15,898 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 22:43:15,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-01-09 22:43:15,967 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 38 statements into 2 equivalence classes. [2025-01-09 22:43:16,002 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 38 of 38 statements. [2025-01-09 22:43:16,002 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 22:43:16,002 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:43:16,004 INFO L256 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-01-09 22:43:16,006 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 22:43:16,029 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-01-09 22:43:16,042 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2025-01-09 22:43:16,048 WARN L873 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| 1))) is different from true [2025-01-09 22:43:16,074 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2025-01-09 22:43:16,074 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2025-01-09 22:43:16,100 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2025-01-09 22:43:16,110 WARN L873 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (<= (+ |node_create_~temp~0#1.base| 1) |c_#StackHeapBarrier|) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| (select |c_#valid| |node_create_~temp~0#1.base|))))) is different from true [2025-01-09 22:43:16,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-01-09 22:43:16,140 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2025-01-09 22:43:16,184 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2025-01-09 22:43:16,185 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2025-01-09 22:43:16,198 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 15 not checked. [2025-01-09 22:43:16,199 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 22:43:16,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848976432] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 22:43:16,380 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-01-09 22:43:16,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 14 [2025-01-09 22:43:16,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598583245] [2025-01-09 22:43:16,380 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-01-09 22:43:16,381 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-01-09 22:43:16,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 22:43:16,381 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-01-09 22:43:16,381 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=187, Unknown=2, NotChecked=58, Total=306 [2025-01-09 22:43:16,382 INFO L87 Difference]: Start difference. First operand 83 states and 90 transitions. Second operand has 15 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 2 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2025-01-09 22:43:16,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 22:43:16,640 INFO L93 Difference]: Finished difference Result 90 states and 98 transitions. [2025-01-09 22:43:16,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-01-09 22:43:16,641 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 2 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 38 [2025-01-09 22:43:16,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 22:43:16,642 INFO L225 Difference]: With dead ends: 90 [2025-01-09 22:43:16,642 INFO L226 Difference]: Without dead ends: 90 [2025-01-09 22:43:16,642 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 48 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=264, Unknown=2, NotChecked=70, Total=420 [2025-01-09 22:43:16,647 INFO L435 NwaCegarLoop]: 42 mSDtfsCounter, 60 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 170 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-01-09 22:43:16,647 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 273 Invalid, 466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 291 Invalid, 0 Unknown, 170 Unchecked, 0.2s Time] [2025-01-09 22:43:16,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2025-01-09 22:43:16,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 78. [2025-01-09 22:43:16,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 52 states have (on average 1.5192307692307692) internal successors, (79), 73 states have internal predecessors, (79), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-01-09 22:43:16,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 85 transitions. [2025-01-09 22:43:16,653 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 85 transitions. Word has length 38 [2025-01-09 22:43:16,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 22:43:16,654 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 85 transitions. [2025-01-09 22:43:16,654 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 2 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2025-01-09 22:43:16,654 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 85 transitions. [2025-01-09 22:43:16,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2025-01-09 22:43:16,654 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 22:43:16,654 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 22:43:16,665 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-01-09 22:43:16,855 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:43:16,856 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-01-09 22:43:16,856 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 22:43:16,856 INFO L85 PathProgramCache]: Analyzing trace with hash -243109317, now seen corresponding path program 1 times [2025-01-09 22:43:16,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 22:43:16,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298553685] [2025-01-09 22:43:16,856 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:43:16,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 22:43:16,874 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 38 statements into 1 equivalence classes. [2025-01-09 22:43:16,889 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 38 of 38 statements. [2025-01-09 22:43:16,889 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:43:16,889 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:43:17,375 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2025-01-09 22:43:17,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 22:43:17,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298553685] [2025-01-09 22:43:17,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298553685] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 22:43:17,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309256989] [2025-01-09 22:43:17,375 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:43:17,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:43:17,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 22:43:17,377 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 22:43:17,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-01-09 22:43:17,451 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 38 statements into 1 equivalence classes. [2025-01-09 22:43:17,483 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 38 of 38 statements. [2025-01-09 22:43:17,484 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:43:17,484 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:43:17,485 INFO L256 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-01-09 22:43:17,487 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 22:43:17,496 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-01-09 22:43:17,509 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2025-01-09 22:43:17,516 WARN L873 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (<= (+ |node_create_~temp~0#1.base| 1) |c_#StackHeapBarrier|) (= (store |c_old(#length)| |node_create_~temp~0#1.base| (select |c_#length| |node_create_~temp~0#1.base|)) |c_#length|))) is different from true [2025-01-09 22:43:17,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-01-09 22:43:17,569 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2025-01-09 22:43:17,599 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2025-01-09 22:43:17,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-01-09 22:43:17,639 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2025-01-09 22:43:17,673 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2025-01-09 22:43:17,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-01-09 22:43:17,707 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2025-01-09 22:43:17,711 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2025-01-09 22:43:17,711 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-09 22:43:17,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309256989] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 22:43:17,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-01-09 22:43:17,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 12 [2025-01-09 22:43:17,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532988599] [2025-01-09 22:43:17,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 22:43:17,711 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-01-09 22:43:17,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 22:43:17,712 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-01-09 22:43:17,712 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=103, Unknown=1, NotChecked=20, Total=156 [2025-01-09 22:43:17,712 INFO L87 Difference]: Start difference. First operand 78 states and 85 transitions. Second operand has 7 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-01-09 22:43:17,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 22:43:17,790 INFO L93 Difference]: Finished difference Result 75 states and 82 transitions. [2025-01-09 22:43:17,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-01-09 22:43:17,790 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 38 [2025-01-09 22:43:17,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 22:43:17,791 INFO L225 Difference]: With dead ends: 75 [2025-01-09 22:43:17,791 INFO L226 Difference]: Without dead ends: 75 [2025-01-09 22:43:17,791 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=122, Unknown=1, NotChecked=22, Total=182 [2025-01-09 22:43:17,791 INFO L435 NwaCegarLoop]: 65 mSDtfsCounter, 4 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 99 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-09 22:43:17,791 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 219 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 109 Invalid, 0 Unknown, 99 Unchecked, 0.1s Time] [2025-01-09 22:43:17,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2025-01-09 22:43:17,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2025-01-09 22:43:17,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 52 states have (on average 1.4615384615384615) internal successors, (76), 70 states have internal predecessors, (76), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-01-09 22:43:17,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 82 transitions. [2025-01-09 22:43:17,797 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 82 transitions. Word has length 38 [2025-01-09 22:43:17,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 22:43:17,798 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 82 transitions. [2025-01-09 22:43:17,798 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-01-09 22:43:17,798 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 82 transitions. [2025-01-09 22:43:17,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2025-01-09 22:43:17,798 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 22:43:17,798 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 22:43:17,807 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-01-09 22:43:17,998 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:43:17,999 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-01-09 22:43:17,999 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 22:43:17,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1440220227, now seen corresponding path program 1 times [2025-01-09 22:43:17,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 22:43:17,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647501284] [2025-01-09 22:43:17,999 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:43:17,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 22:43:18,010 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 42 statements into 1 equivalence classes. [2025-01-09 22:43:18,015 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 42 of 42 statements. [2025-01-09 22:43:18,015 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:43:18,015 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:43:18,185 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2025-01-09 22:43:18,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 22:43:18,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647501284] [2025-01-09 22:43:18,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647501284] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 22:43:18,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666407497] [2025-01-09 22:43:18,185 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:43:18,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:43:18,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 22:43:18,187 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 22:43:18,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-01-09 22:43:18,253 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 42 statements into 1 equivalence classes. [2025-01-09 22:43:18,283 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 42 of 42 statements. [2025-01-09 22:43:18,283 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:43:18,283 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:43:18,285 INFO L256 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-01-09 22:43:18,287 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 22:43:18,292 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-01-09 22:43:18,295 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-01-09 22:43:18,322 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2025-01-09 22:43:18,325 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2025-01-09 22:43:18,339 WARN L873 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (= (store |c_old(#length)| |node_create_~temp~0#1.base| (select |c_#length| |node_create_~temp~0#1.base|)) |c_#length|) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) is different from true [2025-01-09 22:43:18,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-01-09 22:43:18,368 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2025-01-09 22:43:18,373 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-01-09 22:43:18,373 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2025-01-09 22:43:18,415 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2025-01-09 22:43:18,428 WARN L873 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (<= (+ |node_create_~temp~0#1.base| 1) |c_#StackHeapBarrier|) (= (store |c_old(#length)| |node_create_~temp~0#1.base| (select |c_#length| |node_create_~temp~0#1.base|)) |c_#length|))) is different from true [2025-01-09 22:43:18,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-01-09 22:43:18,455 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2025-01-09 22:43:18,484 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2025-01-09 22:43:18,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-01-09 22:43:18,517 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2025-01-09 22:43:18,563 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 12 not checked. [2025-01-09 22:43:18,563 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 22:43:18,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666407497] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 22:43:18,668 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-01-09 22:43:18,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 17 [2025-01-09 22:43:18,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549871659] [2025-01-09 22:43:18,668 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-01-09 22:43:18,669 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-01-09 22:43:18,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 22:43:18,669 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-01-09 22:43:18,669 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=233, Unknown=2, NotChecked=62, Total=342 [2025-01-09 22:43:18,669 INFO L87 Difference]: Start difference. First operand 75 states and 82 transitions. Second operand has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 14 states have internal predecessors, (55), 4 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2025-01-09 22:43:18,682 WARN L873 $PredicateComparison]: unable to prove that (and (not (= |c_node_create_~temp~0#1.base| 0)) (exists ((|node_create_~temp~0#1.base| Int)) (and (= (store |c_old(#length)| |node_create_~temp~0#1.base| (select |c_#length| |node_create_~temp~0#1.base|)) |c_#length|) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) (exists ((|node_create_~temp~0#1.base| Int)) (and (<= (+ |node_create_~temp~0#1.base| 1) |c_#StackHeapBarrier|) (= (store |c_old(#length)| |node_create_~temp~0#1.base| (select |c_#length| |node_create_~temp~0#1.base|)) |c_#length|)))) is different from true [2025-01-09 22:43:18,684 WARN L873 $PredicateComparison]: unable to prove that (and (not (= |c_node_create_#res#1.base| 0)) (exists ((|node_create_~temp~0#1.base| Int)) (and (= (store |c_old(#length)| |node_create_~temp~0#1.base| (select |c_#length| |node_create_~temp~0#1.base|)) |c_#length|) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) (exists ((|node_create_~temp~0#1.base| Int)) (and (<= (+ |node_create_~temp~0#1.base| 1) |c_#StackHeapBarrier|) (= (store |c_old(#length)| |node_create_~temp~0#1.base| (select |c_#length| |node_create_~temp~0#1.base|)) |c_#length|)))) is different from true [2025-01-09 22:43:18,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 22:43:18,871 INFO L93 Difference]: Finished difference Result 72 states and 78 transitions. [2025-01-09 22:43:18,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-01-09 22:43:18,872 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 14 states have internal predecessors, (55), 4 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 42 [2025-01-09 22:43:18,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 22:43:18,872 INFO L225 Difference]: With dead ends: 72 [2025-01-09 22:43:18,872 INFO L226 Difference]: Without dead ends: 72 [2025-01-09 22:43:18,873 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=97, Invalid=467, Unknown=4, NotChecked=188, Total=756 [2025-01-09 22:43:18,873 INFO L435 NwaCegarLoop]: 46 mSDtfsCounter, 37 mSDsluCounter, 431 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 236 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-09 22:43:18,873 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 477 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 255 Invalid, 0 Unknown, 236 Unchecked, 0.1s Time] [2025-01-09 22:43:18,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2025-01-09 22:43:18,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2025-01-09 22:43:18,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 51 states have (on average 1.411764705882353) internal successors, (72), 67 states have internal predecessors, (72), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-01-09 22:43:18,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 78 transitions. [2025-01-09 22:43:18,876 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 78 transitions. Word has length 42 [2025-01-09 22:43:18,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 22:43:18,876 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 78 transitions. [2025-01-09 22:43:18,876 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 14 states have internal predecessors, (55), 4 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2025-01-09 22:43:18,876 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 78 transitions. [2025-01-09 22:43:18,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2025-01-09 22:43:18,876 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 22:43:18,876 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 22:43:18,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-01-09 22:43:19,081 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2025-01-09 22:43:19,081 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-01-09 22:43:19,081 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 22:43:19,081 INFO L85 PathProgramCache]: Analyzing trace with hash -1440067265, now seen corresponding path program 1 times [2025-01-09 22:43:19,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 22:43:19,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163686601] [2025-01-09 22:43:19,081 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:43:19,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 22:43:19,095 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 42 statements into 1 equivalence classes. [2025-01-09 22:43:19,108 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 42 of 42 statements. [2025-01-09 22:43:19,108 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:43:19,108 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:43:19,483 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 21 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-09 22:43:19,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 22:43:19,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163686601] [2025-01-09 22:43:19,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163686601] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 22:43:19,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017877420] [2025-01-09 22:43:19,484 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:43:19,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:43:19,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 22:43:19,488 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 22:43:19,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-01-09 22:43:19,554 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 42 statements into 1 equivalence classes. [2025-01-09 22:43:19,635 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 42 of 42 statements. [2025-01-09 22:43:19,636 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:43:19,636 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:43:19,641 INFO L256 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 38 conjuncts are in the unsatisfiable core [2025-01-09 22:43:19,643 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 22:43:19,784 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2025-01-09 22:43:19,789 WARN L873 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| 1)))) is different from true [2025-01-09 22:43:19,830 INFO L349 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2025-01-09 22:43:19,831 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2025-01-09 22:43:19,904 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2025-01-09 22:43:19,957 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2025-01-09 22:43:19,957 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-09 22:43:19,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017877420] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 22:43:19,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-01-09 22:43:19,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [14] total 23 [2025-01-09 22:43:19,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148206422] [2025-01-09 22:43:19,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 22:43:19,958 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-01-09 22:43:19,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 22:43:19,958 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-01-09 22:43:19,958 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=448, Unknown=1, NotChecked=42, Total=552 [2025-01-09 22:43:19,958 INFO L87 Difference]: Start difference. First operand 72 states and 78 transitions. Second operand has 12 states, 10 states have (on average 2.8) internal successors, (28), 11 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-01-09 22:43:20,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 22:43:20,089 INFO L93 Difference]: Finished difference Result 76 states and 86 transitions. [2025-01-09 22:43:20,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-01-09 22:43:20,090 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.8) internal successors, (28), 11 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 42 [2025-01-09 22:43:20,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 22:43:20,090 INFO L225 Difference]: With dead ends: 76 [2025-01-09 22:43:20,090 INFO L226 Difference]: Without dead ends: 76 [2025-01-09 22:43:20,090 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=489, Unknown=1, NotChecked=44, Total=600 [2025-01-09 22:43:20,091 INFO L435 NwaCegarLoop]: 57 mSDtfsCounter, 5 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 148 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-09 22:43:20,091 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 263 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 203 Invalid, 0 Unknown, 148 Unchecked, 0.1s Time] [2025-01-09 22:43:20,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2025-01-09 22:43:20,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2025-01-09 22:43:20,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 55 states have (on average 1.4545454545454546) internal successors, (80), 71 states have internal predecessors, (80), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-01-09 22:43:20,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 86 transitions. [2025-01-09 22:43:20,094 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 86 transitions. Word has length 42 [2025-01-09 22:43:20,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 22:43:20,094 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 86 transitions. [2025-01-09 22:43:20,094 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.8) internal successors, (28), 11 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-01-09 22:43:20,094 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 86 transitions. [2025-01-09 22:43:20,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2025-01-09 22:43:20,094 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 22:43:20,094 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 22:43:20,102 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-01-09 22:43:20,295 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2025-01-09 22:43:20,295 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-01-09 22:43:20,295 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 22:43:20,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1440067264, now seen corresponding path program 1 times [2025-01-09 22:43:20,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 22:43:20,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466059334] [2025-01-09 22:43:20,295 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:43:20,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 22:43:20,306 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 42 statements into 1 equivalence classes. [2025-01-09 22:43:20,312 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 42 of 42 statements. [2025-01-09 22:43:20,312 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:43:20,312 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:43:20,671 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 19 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-09 22:43:20,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 22:43:20,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466059334] [2025-01-09 22:43:20,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466059334] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 22:43:20,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772076588] [2025-01-09 22:43:20,672 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:43:20,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:43:20,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 22:43:20,673 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 22:43:20,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-01-09 22:43:20,749 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 42 statements into 1 equivalence classes. [2025-01-09 22:43:20,784 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 42 of 42 statements. [2025-01-09 22:43:20,784 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:43:20,784 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:43:20,786 INFO L256 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 60 conjuncts are in the unsatisfiable core [2025-01-09 22:43:20,788 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 22:43:20,817 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-01-09 22:43:21,058 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2025-01-09 22:43:21,065 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2025-01-09 22:43:21,098 WARN L873 $PredicateComparison]: unable to prove that (and (exists ((|node_create_~temp~0#1.base| Int)) (and (= (store |c_old(#length)| |node_create_~temp~0#1.base| (select |c_#length| |node_create_~temp~0#1.base|)) |c_#length|) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) (exists ((|v_ULTIMATE.start_sll_append_~head#1.base_BEFORE_CALL_5| Int)) (= (select (select |c_#memory_$Pointer$#1.offset| |v_ULTIMATE.start_sll_append_~head#1.base_BEFORE_CALL_5|) 0) 0))) is different from true [2025-01-09 22:43:21,132 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2025-01-09 22:43:21,133 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2025-01-09 22:43:21,136 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2025-01-09 22:43:21,187 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2025-01-09 22:43:21,230 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 6 not checked. [2025-01-09 22:43:21,231 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 22:43:21,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772076588] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 22:43:21,389 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-01-09 22:43:21,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 29 [2025-01-09 22:43:21,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68846119] [2025-01-09 22:43:21,389 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-01-09 22:43:21,389 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2025-01-09 22:43:21,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 22:43:21,390 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2025-01-09 22:43:21,390 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=966, Unknown=1, NotChecked=62, Total=1122 [2025-01-09 22:43:21,390 INFO L87 Difference]: Start difference. First operand 76 states and 86 transitions. Second operand has 30 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 26 states have internal predecessors, (63), 4 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2025-01-09 22:43:22,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 22:43:22,108 INFO L93 Difference]: Finished difference Result 83 states and 89 transitions. [2025-01-09 22:43:22,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-01-09 22:43:22,109 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 26 states have internal predecessors, (63), 4 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 42 [2025-01-09 22:43:22,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 22:43:22,110 INFO L225 Difference]: With dead ends: 83 [2025-01-09 22:43:22,110 INFO L226 Difference]: Without dead ends: 83 [2025-01-09 22:43:22,111 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=168, Invalid=1815, Unknown=1, NotChecked=86, Total=2070 [2025-01-09 22:43:22,111 INFO L435 NwaCegarLoop]: 55 mSDtfsCounter, 52 mSDsluCounter, 676 mSDsCounter, 0 mSdLazyCounter, 822 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 731 SdHoareTripleChecker+Invalid, 907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-01-09 22:43:22,111 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 731 Invalid, 907 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 822 Invalid, 0 Unknown, 79 Unchecked, 0.4s Time] [2025-01-09 22:43:22,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2025-01-09 22:43:22,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2025-01-09 22:43:22,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 61 states have (on average 1.360655737704918) internal successors, (83), 77 states have internal predecessors, (83), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-01-09 22:43:22,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 89 transitions. [2025-01-09 22:43:22,115 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 89 transitions. Word has length 42 [2025-01-09 22:43:22,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 22:43:22,116 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 89 transitions. [2025-01-09 22:43:22,116 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 26 states have internal predecessors, (63), 4 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2025-01-09 22:43:22,116 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 89 transitions. [2025-01-09 22:43:22,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2025-01-09 22:43:22,118 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 22:43:22,118 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 22:43:22,126 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-01-09 22:43:22,319 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2025-01-09 22:43:22,320 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-01-09 22:43:22,320 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 22:43:22,320 INFO L85 PathProgramCache]: Analyzing trace with hash -32027497, now seen corresponding path program 1 times [2025-01-09 22:43:22,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 22:43:22,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402337482] [2025-01-09 22:43:22,321 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:43:22,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 22:43:22,335 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 46 statements into 1 equivalence classes. [2025-01-09 22:43:22,345 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 46 of 46 statements. [2025-01-09 22:43:22,346 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:43:22,346 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:43:23,297 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 22:43:23,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 22:43:23,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402337482] [2025-01-09 22:43:23,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402337482] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 22:43:23,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562532057] [2025-01-09 22:43:23,297 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:43:23,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:43:23,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 22:43:23,299 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 22:43:23,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-01-09 22:43:23,396 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 46 statements into 1 equivalence classes. [2025-01-09 22:43:23,434 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 46 of 46 statements. [2025-01-09 22:43:23,434 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:43:23,435 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:43:23,440 INFO L256 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 87 conjuncts are in the unsatisfiable core [2025-01-09 22:43:23,443 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 22:43:23,615 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2025-01-09 22:43:23,616 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2025-01-09 22:43:23,685 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-01-09 22:43:23,837 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2025-01-09 22:43:23,840 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-01-09 22:43:23,991 WARN L873 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_sll_append_~head#1.base_BEFORE_CALL_6| Int)) (= (select (select |c_#memory_$Pointer$#1.offset| |v_ULTIMATE.start_sll_append_~head#1.base_BEFORE_CALL_6|) 0) 0)) (exists ((|node_create_~temp~0#1.base| Int)) (and (= (store |c_old(#memory_$Pointer$#2.base)| |node_create_~temp~0#1.base| (select |c_#memory_$Pointer$#2.base| |node_create_~temp~0#1.base|)) |c_#memory_$Pointer$#2.base|) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| 1))))) is different from true [2025-01-09 22:43:24,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-01-09 22:43:24,026 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 27 [2025-01-09 22:43:24,051 INFO L349 Elim1Store]: treesize reduction 72, result has 37.4 percent of original size [2025-01-09 22:43:24,051 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 34 treesize of output 57 [2025-01-09 22:43:24,194 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 38 [2025-01-09 22:43:24,343 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2025-01-09 22:43:24,445 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 22 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2025-01-09 22:43:24,445 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 22:43:24,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562532057] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 22:43:24,620 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-01-09 22:43:24,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 22] total 44 [2025-01-09 22:43:24,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398811763] [2025-01-09 22:43:24,620 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-01-09 22:43:24,621 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2025-01-09 22:43:24,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 22:43:24,621 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2025-01-09 22:43:24,622 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=2097, Unknown=1, NotChecked=92, Total=2352 [2025-01-09 22:43:24,622 INFO L87 Difference]: Start difference. First operand 83 states and 89 transitions. Second operand has 45 states, 42 states have (on average 1.8333333333333333) internal successors, (77), 39 states have internal predecessors, (77), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-01-09 22:43:25,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 22:43:25,758 INFO L93 Difference]: Finished difference Result 89 states and 100 transitions. [2025-01-09 22:43:25,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2025-01-09 22:43:25,758 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 42 states have (on average 1.8333333333333333) internal successors, (77), 39 states have internal predecessors, (77), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 46 [2025-01-09 22:43:25,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 22:43:25,759 INFO L225 Difference]: With dead ends: 89 [2025-01-09 22:43:25,759 INFO L226 Difference]: Without dead ends: 89 [2025-01-09 22:43:25,760 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1073 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=308, Invalid=3985, Unknown=1, NotChecked=128, Total=4422 [2025-01-09 22:43:25,760 INFO L435 NwaCegarLoop]: 51 mSDtfsCounter, 65 mSDsluCounter, 810 mSDsCounter, 0 mSdLazyCounter, 1244 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 861 SdHoareTripleChecker+Invalid, 1355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 97 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-01-09 22:43:25,760 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 861 Invalid, 1355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1244 Invalid, 0 Unknown, 97 Unchecked, 0.6s Time] [2025-01-09 22:43:25,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2025-01-09 22:43:25,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 83. [2025-01-09 22:43:25,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 63 states have (on average 1.3333333333333333) internal successors, (84), 77 states have internal predecessors, (84), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-01-09 22:43:25,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 90 transitions. [2025-01-09 22:43:25,766 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 90 transitions. Word has length 46 [2025-01-09 22:43:25,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 22:43:25,766 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 90 transitions. [2025-01-09 22:43:25,766 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 42 states have (on average 1.8333333333333333) internal successors, (77), 39 states have internal predecessors, (77), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-01-09 22:43:25,766 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 90 transitions. [2025-01-09 22:43:25,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2025-01-09 22:43:25,766 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 22:43:25,766 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 22:43:25,773 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-01-09 22:43:25,971 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:43:25,971 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-01-09 22:43:25,971 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 22:43:25,971 INFO L85 PathProgramCache]: Analyzing trace with hash -32027496, now seen corresponding path program 1 times [2025-01-09 22:43:25,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 22:43:25,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473765069] [2025-01-09 22:43:25,971 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:43:25,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 22:43:25,981 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 46 statements into 1 equivalence classes. [2025-01-09 22:43:25,990 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 46 of 46 statements. [2025-01-09 22:43:25,990 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:43:25,990 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:43:27,461 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 22:43:27,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 22:43:27,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473765069] [2025-01-09 22:43:27,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473765069] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 22:43:27,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153767409] [2025-01-09 22:43:27,461 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:43:27,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:43:27,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 22:43:27,463 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 22:43:27,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-01-09 22:43:27,548 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 46 statements into 1 equivalence classes. [2025-01-09 22:43:27,625 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 46 of 46 statements. [2025-01-09 22:43:27,626 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:43:27,626 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:43:27,629 INFO L256 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 116 conjuncts are in the unsatisfiable core [2025-01-09 22:43:27,632 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 22:43:27,659 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-01-09 22:43:27,920 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-01-09 22:43:27,971 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2025-01-09 22:43:28,066 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2025-01-09 22:43:28,066 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2025-01-09 22:43:28,091 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2025-01-09 22:43:28,091 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2025-01-09 22:43:28,212 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2025-01-09 22:43:28,216 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-01-09 22:43:28,484 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 23 [2025-01-09 22:43:28,488 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2025-01-09 22:43:28,491 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-01-09 22:43:28,495 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2025-01-09 22:43:28,687 WARN L873 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_sll_append_~head#1.base_BEFORE_CALL_7| Int)) (= (select (select |c_#memory_$Pointer$#1.offset| |v_ULTIMATE.start_sll_append_~head#1.base_BEFORE_CALL_7|) 0) 0)) (exists ((|node_create_~temp~0#1.base| Int)) (and (= (store |c_old(#memory_$Pointer$#2.base)| |node_create_~temp~0#1.base| (select |c_#memory_$Pointer$#2.base| |node_create_~temp~0#1.base|)) |c_#memory_$Pointer$#2.base|) (= (store |c_old(#length)| |node_create_~temp~0#1.base| (select |c_#length| |node_create_~temp~0#1.base|)) |c_#length|) (= (store |c_old(#memory_$Pointer$#2.offset)| |node_create_~temp~0#1.base| (select |c_#memory_$Pointer$#2.offset| |node_create_~temp~0#1.base|)) |c_#memory_$Pointer$#2.offset|) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|))))) is different from true [2025-01-09 22:43:28,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-01-09 22:43:28,715 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 40 [2025-01-09 22:43:28,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-01-09 22:43:28,720 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2025-01-09 22:43:28,732 INFO L349 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2025-01-09 22:43:28,732 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 30 [2025-01-09 22:43:28,735 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2025-01-09 22:43:28,913 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 36 [2025-01-09 22:43:29,037 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2025-01-09 22:43:29,039 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2025-01-09 22:43:29,125 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2025-01-09 22:43:29,125 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 22:43:29,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153767409] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 22:43:29,572 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-01-09 22:43:29,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 54 [2025-01-09 22:43:29,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331241979] [2025-01-09 22:43:29,572 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-01-09 22:43:29,573 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2025-01-09 22:43:29,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 22:43:29,573 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2025-01-09 22:43:29,574 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=3479, Unknown=1, NotChecked=118, Total=3782 [2025-01-09 22:43:29,574 INFO L87 Difference]: Start difference. First operand 83 states and 90 transitions. Second operand has 55 states, 52 states have (on average 1.5192307692307692) internal successors, (79), 48 states have internal predecessors, (79), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-01-09 22:43:31,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 22:43:31,704 INFO L93 Difference]: Finished difference Result 89 states and 97 transitions. [2025-01-09 22:43:31,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2025-01-09 22:43:31,704 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 52 states have (on average 1.5192307692307692) internal successors, (79), 48 states have internal predecessors, (79), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 46 [2025-01-09 22:43:31,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 22:43:31,705 INFO L225 Difference]: With dead ends: 89 [2025-01-09 22:43:31,705 INFO L226 Difference]: Without dead ends: 89 [2025-01-09 22:43:31,706 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1239 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=370, Invalid=6113, Unknown=1, NotChecked=158, Total=6642 [2025-01-09 22:43:31,707 INFO L435 NwaCegarLoop]: 54 mSDtfsCounter, 69 mSDsluCounter, 1245 mSDsCounter, 0 mSdLazyCounter, 1955 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 1299 SdHoareTripleChecker+Invalid, 2063 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2025-01-09 22:43:31,707 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 1299 Invalid, 2063 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1955 Invalid, 0 Unknown, 94 Unchecked, 1.1s Time] [2025-01-09 22:43:31,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2025-01-09 22:43:31,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 85. [2025-01-09 22:43:31,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 65 states have (on average 1.323076923076923) internal successors, (86), 79 states have internal predecessors, (86), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-01-09 22:43:31,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 92 transitions. [2025-01-09 22:43:31,711 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 92 transitions. Word has length 46 [2025-01-09 22:43:31,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 22:43:31,711 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 92 transitions. [2025-01-09 22:43:31,711 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 52 states have (on average 1.5192307692307692) internal successors, (79), 48 states have internal predecessors, (79), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-01-09 22:43:31,712 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 92 transitions. [2025-01-09 22:43:31,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2025-01-09 22:43:31,712 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 22:43:31,712 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 22:43:31,719 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-01-09 22:43:31,912 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:43:31,913 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-01-09 22:43:31,913 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 22:43:31,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1374084079, now seen corresponding path program 2 times [2025-01-09 22:43:31,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 22:43:31,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135816471] [2025-01-09 22:43:31,914 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 22:43:31,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 22:43:31,923 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 50 statements into 2 equivalence classes. [2025-01-09 22:43:31,957 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 50 of 50 statements. [2025-01-09 22:43:31,957 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 22:43:31,957 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:43:33,473 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 22:43:33,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 22:43:33,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135816471] [2025-01-09 22:43:33,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135816471] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 22:43:33,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354305394] [2025-01-09 22:43:33,473 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 22:43:33,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:43:33,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 22:43:33,475 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 22:43:33,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-01-09 22:43:33,577 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 50 statements into 2 equivalence classes. [2025-01-09 22:43:33,617 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 50 of 50 statements. [2025-01-09 22:43:33,617 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 22:43:33,617 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:43:33,625 INFO L256 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 132 conjuncts are in the unsatisfiable core [2025-01-09 22:43:33,628 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 22:43:33,776 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-01-09 22:43:33,780 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-01-09 22:43:34,025 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2025-01-09 22:43:34,025 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2025-01-09 22:43:34,030 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-01-09 22:43:34,034 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-01-09 22:43:34,150 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2025-01-09 22:43:34,154 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2025-01-09 22:43:34,375 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2025-01-09 22:43:34,375 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 27 [2025-01-09 22:43:34,380 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-01-09 22:43:34,383 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2025-01-09 22:43:34,541 WARN L873 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_sll_append_~head#1.base_BEFORE_CALL_8| Int)) (= (select (select |c_#memory_$Pointer$#1.offset| |v_ULTIMATE.start_sll_append_~head#1.base_BEFORE_CALL_8|) 0) 0)) (exists ((|node_create_~temp~0#1.base| Int)) (and (= (store |c_old(#memory_$Pointer$#2.base)| |node_create_~temp~0#1.base| (select |c_#memory_$Pointer$#2.base| |node_create_~temp~0#1.base|)) |c_#memory_$Pointer$#2.base|) (= (store |c_old(#memory_$Pointer$#2.offset)| |node_create_~temp~0#1.base| (select |c_#memory_$Pointer$#2.offset| |node_create_~temp~0#1.base|)) |c_#memory_$Pointer$#2.offset|) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|))))) is different from true [2025-01-09 22:43:34,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-01-09 22:43:34,569 INFO L349 Elim1Store]: treesize reduction 29, result has 14.7 percent of original size [2025-01-09 22:43:34,569 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 68 treesize of output 51 [2025-01-09 22:43:34,589 INFO L349 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2025-01-09 22:43:34,589 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 30 [2025-01-09 22:43:34,593 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 33 [2025-01-09 22:43:34,693 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 41 [2025-01-09 22:43:34,968 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 13 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2025-01-09 22:43:34,969 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 22:43:35,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354305394] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 22:43:35,322 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-01-09 22:43:35,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 54 [2025-01-09 22:43:35,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099629488] [2025-01-09 22:43:35,323 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-01-09 22:43:35,323 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2025-01-09 22:43:35,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 22:43:35,325 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2025-01-09 22:43:35,325 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=3233, Unknown=1, NotChecked=114, Total=3540 [2025-01-09 22:43:35,325 INFO L87 Difference]: Start difference. First operand 85 states and 92 transitions. Second operand has 54 states, 52 states have (on average 1.5384615384615385) internal successors, (80), 48 states have internal predecessors, (80), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-01-09 22:43:36,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 22:43:36,307 INFO L93 Difference]: Finished difference Result 115 states and 126 transitions. [2025-01-09 22:43:36,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-01-09 22:43:36,307 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 52 states have (on average 1.5384615384615385) internal successors, (80), 48 states have internal predecessors, (80), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 50 [2025-01-09 22:43:36,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 22:43:36,309 INFO L225 Difference]: With dead ends: 115 [2025-01-09 22:43:36,309 INFO L226 Difference]: Without dead ends: 115 [2025-01-09 22:43:36,310 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1248 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=269, Invalid=4426, Unknown=1, NotChecked=134, Total=4830 [2025-01-09 22:43:36,310 INFO L435 NwaCegarLoop]: 55 mSDtfsCounter, 16 mSDsluCounter, 1255 mSDsCounter, 0 mSdLazyCounter, 1380 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 1310 SdHoareTripleChecker+Invalid, 1501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 107 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-01-09 22:43:36,310 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 1310 Invalid, 1501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1380 Invalid, 0 Unknown, 107 Unchecked, 0.6s Time] [2025-01-09 22:43:36,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2025-01-09 22:43:36,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 110. [2025-01-09 22:43:36,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 87 states have (on average 1.264367816091954) internal successors, (110), 101 states have internal predecessors, (110), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2025-01-09 22:43:36,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 120 transitions. [2025-01-09 22:43:36,317 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 120 transitions. Word has length 50 [2025-01-09 22:43:36,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 22:43:36,318 INFO L471 AbstractCegarLoop]: Abstraction has 110 states and 120 transitions. [2025-01-09 22:43:36,318 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 52 states have (on average 1.5384615384615385) internal successors, (80), 48 states have internal predecessors, (80), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-01-09 22:43:36,318 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 120 transitions. [2025-01-09 22:43:36,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2025-01-09 22:43:36,318 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 22:43:36,318 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 22:43:36,328 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-01-09 22:43:36,519 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:43:36,519 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-01-09 22:43:36,520 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 22:43:36,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1592350994, now seen corresponding path program 1 times [2025-01-09 22:43:36,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 22:43:36,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999409822] [2025-01-09 22:43:36,520 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:43:36,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 22:43:36,530 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 50 statements into 1 equivalence classes. [2025-01-09 22:43:36,535 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 50 of 50 statements. [2025-01-09 22:43:36,535 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:43:36,535 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:43:36,630 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2025-01-09 22:43:36,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 22:43:36,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999409822] [2025-01-09 22:43:36,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999409822] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 22:43:36,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 22:43:36,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-01-09 22:43:36,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632320426] [2025-01-09 22:43:36,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 22:43:36,631 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-01-09 22:43:36,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 22:43:36,632 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-01-09 22:43:36,632 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2025-01-09 22:43:36,632 INFO L87 Difference]: Start difference. First operand 110 states and 120 transitions. Second operand has 9 states, 8 states have (on average 3.5) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-01-09 22:43:36,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 22:43:36,733 INFO L93 Difference]: Finished difference Result 112 states and 124 transitions. [2025-01-09 22:43:36,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-01-09 22:43:36,733 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.5) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 50 [2025-01-09 22:43:36,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 22:43:36,733 INFO L225 Difference]: With dead ends: 112 [2025-01-09 22:43:36,733 INFO L226 Difference]: Without dead ends: 112 [2025-01-09 22:43:36,734 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2025-01-09 22:43:36,735 INFO L435 NwaCegarLoop]: 51 mSDtfsCounter, 37 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-09 22:43:36,735 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 279 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-09 22:43:36,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2025-01-09 22:43:36,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2025-01-09 22:43:36,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 89 states have (on average 1.2696629213483146) internal successors, (113), 102 states have internal predecessors, (113), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2025-01-09 22:43:36,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 123 transitions. [2025-01-09 22:43:36,737 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 123 transitions. Word has length 50 [2025-01-09 22:43:36,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 22:43:36,737 INFO L471 AbstractCegarLoop]: Abstraction has 111 states and 123 transitions. [2025-01-09 22:43:36,737 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.5) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-01-09 22:43:36,737 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 123 transitions. [2025-01-09 22:43:36,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2025-01-09 22:43:36,739 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 22:43:36,739 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 22:43:36,739 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2025-01-09 22:43:36,739 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-01-09 22:43:36,739 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 22:43:36,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1592350993, now seen corresponding path program 1 times [2025-01-09 22:43:36,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 22:43:36,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760525556] [2025-01-09 22:43:36,739 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:43:36,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 22:43:36,749 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 50 statements into 1 equivalence classes. [2025-01-09 22:43:36,753 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 50 of 50 statements. [2025-01-09 22:43:36,753 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:43:36,753 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:43:37,069 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2025-01-09 22:43:37,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 22:43:37,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760525556] [2025-01-09 22:43:37,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760525556] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 22:43:37,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994006537] [2025-01-09 22:43:37,070 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:43:37,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:43:37,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 22:43:37,074 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 22:43:37,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-01-09 22:43:37,176 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 50 statements into 1 equivalence classes. [2025-01-09 22:43:37,211 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 50 of 50 statements. [2025-01-09 22:43:37,212 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:43:37,212 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:43:37,213 INFO L256 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 43 conjuncts are in the unsatisfiable core [2025-01-09 22:43:37,216 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 22:43:37,221 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-01-09 22:43:37,430 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2025-01-09 22:43:37,433 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2025-01-09 22:43:37,481 WARN L873 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_8| Int) (|v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_16| Int)) (let ((.cse0 (select (select |c_#memory_$Pointer$#1.offset| |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_8|) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_16|))) (and (<= .cse0 0) (<= 0 (+ 4 .cse0))))) (exists ((|node_create_~temp~0#1.base| Int)) (and (= (store |c_old(#length)| |node_create_~temp~0#1.base| (select |c_#length| |node_create_~temp~0#1.base|)) |c_#length|) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|))))) is different from true [2025-01-09 22:43:37,529 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2025-01-09 22:43:37,529 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2025-01-09 22:43:37,532 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2025-01-09 22:43:37,683 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2025-01-09 22:43:37,690 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-09 22:43:37,690 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 32 [2025-01-09 22:43:37,755 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 6 not checked. [2025-01-09 22:43:37,755 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 22:43:37,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994006537] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 22:43:37,929 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-01-09 22:43:37,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2025-01-09 22:43:37,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127115432] [2025-01-09 22:43:37,929 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-01-09 22:43:37,929 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-01-09 22:43:37,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 22:43:37,930 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-01-09 22:43:37,930 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=855, Unknown=1, NotChecked=58, Total=992 [2025-01-09 22:43:37,930 INFO L87 Difference]: Start difference. First operand 111 states and 123 transitions. Second operand has 28 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 25 states have internal predecessors, (68), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2025-01-09 22:43:38,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 22:43:38,549 INFO L93 Difference]: Finished difference Result 114 states and 125 transitions. [2025-01-09 22:43:38,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-01-09 22:43:38,550 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 25 states have internal predecessors, (68), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 50 [2025-01-09 22:43:38,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 22:43:38,551 INFO L225 Difference]: With dead ends: 114 [2025-01-09 22:43:38,551 INFO L226 Difference]: Without dead ends: 114 [2025-01-09 22:43:38,552 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=180, Invalid=1985, Unknown=1, NotChecked=90, Total=2256 [2025-01-09 22:43:38,552 INFO L435 NwaCegarLoop]: 42 mSDtfsCounter, 86 mSDsluCounter, 675 mSDsCounter, 0 mSdLazyCounter, 841 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 717 SdHoareTripleChecker+Invalid, 928 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 841 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-01-09 22:43:38,552 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 717 Invalid, 928 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 841 Invalid, 0 Unknown, 81 Unchecked, 0.3s Time] [2025-01-09 22:43:38,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2025-01-09 22:43:38,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2025-01-09 22:43:38,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 91 states have (on average 1.2527472527472527) internal successors, (114), 104 states have internal predecessors, (114), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2025-01-09 22:43:38,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 124 transitions. [2025-01-09 22:43:38,554 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 124 transitions. Word has length 50 [2025-01-09 22:43:38,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 22:43:38,554 INFO L471 AbstractCegarLoop]: Abstraction has 113 states and 124 transitions. [2025-01-09 22:43:38,554 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 25 states have internal predecessors, (68), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2025-01-09 22:43:38,554 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 124 transitions. [2025-01-09 22:43:38,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2025-01-09 22:43:38,555 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 22:43:38,555 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 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] [2025-01-09 22:43:38,561 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-01-09 22:43:38,759 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2025-01-09 22:43:38,759 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-01-09 22:43:38,759 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 22:43:38,759 INFO L85 PathProgramCache]: Analyzing trace with hash 198806623, now seen corresponding path program 1 times [2025-01-09 22:43:38,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 22:43:38,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172596956] [2025-01-09 22:43:38,759 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:43:38,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 22:43:38,768 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 53 statements into 1 equivalence classes. [2025-01-09 22:43:38,771 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 53 of 53 statements. [2025-01-09 22:43:38,772 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:43:38,772 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:43:38,863 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2025-01-09 22:43:38,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 22:43:38,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172596956] [2025-01-09 22:43:38,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172596956] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 22:43:38,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194654950] [2025-01-09 22:43:38,863 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:43:38,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:43:38,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 22:43:38,865 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 22:43:38,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-01-09 22:43:38,961 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 53 statements into 1 equivalence classes. [2025-01-09 22:43:38,991 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 53 of 53 statements. [2025-01-09 22:43:38,991 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:43:38,991 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:43:38,992 INFO L256 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-01-09 22:43:38,993 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 22:43:39,061 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2025-01-09 22:43:39,063 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 19 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-09 22:43:39,063 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 22:43:39,104 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2025-01-09 22:43:39,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194654950] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 22:43:39,104 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 22:43:39,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 12 [2025-01-09 22:43:39,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302611104] [2025-01-09 22:43:39,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 22:43:39,105 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-01-09 22:43:39,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 22:43:39,105 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-01-09 22:43:39,105 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2025-01-09 22:43:39,105 INFO L87 Difference]: Start difference. First operand 113 states and 124 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2025-01-09 22:43:43,126 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-01-09 22:43:47,135 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-01-09 22:43:51,154 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-01-09 22:43:55,185 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-01-09 22:43:55,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 22:43:55,273 INFO L93 Difference]: Finished difference Result 113 states and 123 transitions. [2025-01-09 22:43:55,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-01-09 22:43:55,274 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 53 [2025-01-09 22:43:55,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 22:43:55,274 INFO L225 Difference]: With dead ends: 113 [2025-01-09 22:43:55,274 INFO L226 Difference]: Without dead ends: 113 [2025-01-09 22:43:55,274 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2025-01-09 22:43:55,276 INFO L435 NwaCegarLoop]: 55 mSDtfsCounter, 77 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 0 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.1s IncrementalHoareTripleChecker+Time [2025-01-09 22:43:55,276 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 502 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 227 Invalid, 4 Unknown, 0 Unchecked, 16.1s Time] [2025-01-09 22:43:55,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2025-01-09 22:43:55,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2025-01-09 22:43:55,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 91 states have (on average 1.2417582417582418) internal successors, (113), 104 states have internal predecessors, (113), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2025-01-09 22:43:55,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 123 transitions. [2025-01-09 22:43:55,280 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 123 transitions. Word has length 53 [2025-01-09 22:43:55,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 22:43:55,280 INFO L471 AbstractCegarLoop]: Abstraction has 113 states and 123 transitions. [2025-01-09 22:43:55,280 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2025-01-09 22:43:55,280 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 123 transitions. [2025-01-09 22:43:55,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2025-01-09 22:43:55,281 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 22:43:55,281 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 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] [2025-01-09 22:43:55,287 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-01-09 22:43:55,485 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-01-09 22:43:55,485 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-01-09 22:43:55,485 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 22:43:55,485 INFO L85 PathProgramCache]: Analyzing trace with hash 2039055842, now seen corresponding path program 1 times [2025-01-09 22:43:55,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 22:43:55,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827798106] [2025-01-09 22:43:55,488 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:43:55,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 22:43:55,503 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 55 statements into 1 equivalence classes. [2025-01-09 22:43:55,513 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 55 of 55 statements. [2025-01-09 22:43:55,516 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:43:55,516 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:43:56,051 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-09 22:43:56,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 22:43:56,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827798106] [2025-01-09 22:43:56,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827798106] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 22:43:56,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663973873] [2025-01-09 22:43:56,052 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:43:56,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:43:56,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 22:43:56,054 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 22:43:56,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-01-09 22:43:56,163 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 55 statements into 1 equivalence classes. [2025-01-09 22:43:56,200 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 55 of 55 statements. [2025-01-09 22:43:56,201 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:43:56,201 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:43:56,203 INFO L256 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 73 conjuncts are in the unsatisfiable core [2025-01-09 22:43:56,205 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 22:43:56,353 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2025-01-09 22:43:56,353 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2025-01-09 22:43:56,396 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2025-01-09 22:43:56,490 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 5 [2025-01-09 22:43:56,493 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2025-01-09 22:43:56,493 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 7 [2025-01-09 22:43:56,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-01-09 22:43:56,589 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 23 [2025-01-09 22:43:56,608 INFO L349 Elim1Store]: treesize reduction 116, result has 32.2 percent of original size [2025-01-09 22:43:56,609 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 40 treesize of output 69 [2025-01-09 22:43:56,768 INFO L349 Elim1Store]: treesize reduction 41, result has 44.6 percent of original size [2025-01-09 22:43:56,768 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 49 [2025-01-09 22:43:56,916 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 152 treesize of output 116 [2025-01-09 22:43:56,920 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 91 [2025-01-09 22:43:57,085 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-09 22:43:57,085 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 97 treesize of output 55 [2025-01-09 22:43:57,318 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 28 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 22:43:57,319 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 22:43:57,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663973873] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 22:43:57,735 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-01-09 22:43:57,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2025-01-09 22:43:57,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555691861] [2025-01-09 22:43:57,735 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-01-09 22:43:57,735 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2025-01-09 22:43:57,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 22:43:57,736 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2025-01-09 22:43:57,736 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=2807, Unknown=0, NotChecked=0, Total=2970 [2025-01-09 22:43:57,737 INFO L87 Difference]: Start difference. First operand 113 states and 123 transitions. Second operand has 46 states, 44 states have (on average 2.1363636363636362) internal successors, (94), 40 states have internal predecessors, (94), 5 states have call successors, (5), 3 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2025-01-09 22:43:59,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 22:43:59,316 INFO L93 Difference]: Finished difference Result 120 states and 130 transitions. [2025-01-09 22:43:59,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2025-01-09 22:43:59,316 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 44 states have (on average 2.1363636363636362) internal successors, (94), 40 states have internal predecessors, (94), 5 states have call successors, (5), 3 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 55 [2025-01-09 22:43:59,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 22:43:59,317 INFO L225 Difference]: With dead ends: 120 [2025-01-09 22:43:59,317 INFO L226 Difference]: Without dead ends: 120 [2025-01-09 22:43:59,318 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1116 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=386, Invalid=5776, Unknown=0, NotChecked=0, Total=6162 [2025-01-09 22:43:59,319 INFO L435 NwaCegarLoop]: 40 mSDtfsCounter, 97 mSDsluCounter, 1071 mSDsCounter, 0 mSdLazyCounter, 1637 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 1111 SdHoareTripleChecker+Invalid, 1645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2025-01-09 22:43:59,319 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 1111 Invalid, 1645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1637 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2025-01-09 22:43:59,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2025-01-09 22:43:59,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 116. [2025-01-09 22:43:59,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 94 states have (on average 1.2446808510638299) internal successors, (117), 107 states have internal predecessors, (117), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2025-01-09 22:43:59,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 127 transitions. [2025-01-09 22:43:59,322 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 127 transitions. Word has length 55 [2025-01-09 22:43:59,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 22:43:59,323 INFO L471 AbstractCegarLoop]: Abstraction has 116 states and 127 transitions. [2025-01-09 22:43:59,323 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 44 states have (on average 2.1363636363636362) internal successors, (94), 40 states have internal predecessors, (94), 5 states have call successors, (5), 3 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2025-01-09 22:43:59,323 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 127 transitions. [2025-01-09 22:43:59,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2025-01-09 22:43:59,324 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 22:43:59,324 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 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] [2025-01-09 22:43:59,330 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-01-09 22:43:59,526 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-01-09 22:43:59,527 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-01-09 22:43:59,527 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 22:43:59,527 INFO L85 PathProgramCache]: Analyzing trace with hash -32917109, now seen corresponding path program 1 times [2025-01-09 22:43:59,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 22:43:59,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950126929] [2025-01-09 22:43:59,527 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:43:59,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 22:43:59,537 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 59 statements into 1 equivalence classes. [2025-01-09 22:43:59,546 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 59 of 59 statements. [2025-01-09 22:43:59,546 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:43:59,546 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:44:01,014 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 24 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 22:44:01,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 22:44:01,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950126929] [2025-01-09 22:44:01,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950126929] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 22:44:01,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888087971] [2025-01-09 22:44:01,014 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:44:01,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:44:01,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 22:44:01,016 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 22:44:01,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-01-09 22:44:01,133 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 59 statements into 1 equivalence classes. [2025-01-09 22:44:01,174 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 59 of 59 statements. [2025-01-09 22:44:01,175 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:44:01,175 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:44:01,182 INFO L256 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 133 conjuncts are in the unsatisfiable core [2025-01-09 22:44:01,189 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 22:44:01,195 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-01-09 22:44:01,604 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2025-01-09 22:44:01,605 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2025-01-09 22:44:01,613 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2025-01-09 22:44:01,708 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-01-09 22:44:01,716 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-01-09 22:44:01,941 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 23 [2025-01-09 22:44:01,945 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-01-09 22:44:01,950 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2025-01-09 22:44:01,953 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-01-09 22:44:12,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-01-09 22:44:12,519 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 40 [2025-01-09 22:44:12,625 INFO L349 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2025-01-09 22:44:12,626 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 30 [2025-01-09 22:44:12,637 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2025-01-09 22:44:12,656 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 29 [2025-01-09 22:44:16,431 INFO L349 Elim1Store]: treesize reduction 112, result has 15.8 percent of original size [2025-01-09 22:44:16,432 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 105 treesize of output 74 [2025-01-09 22:44:16,585 INFO L349 Elim1Store]: treesize reduction 63, result has 33.0 percent of original size [2025-01-09 22:44:16,586 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 88 treesize of output 51 [2025-01-09 22:44:17,601 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 146 treesize of output 114 [2025-01-09 22:44:19,249 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2025-01-09 22:44:19,631 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-09 22:44:19,631 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 81 treesize of output 173