./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-examples/standard_strcpy_ground-2.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/array-examples/standard_strcpy_ground-2.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 1dc3813f801c08c10697b6f3aeaa3afb846521f0bb73d940036cc656d8340c66 --- Real Ultimate output --- This is Ultimate 0.3.0-?-551b009-m [2025-01-09 22:07:13,688 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-01-09 22:07:13,747 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-01-09 22:07:13,752 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-01-09 22:07:13,753 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-01-09 22:07:13,774 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-01-09 22:07:13,775 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-01-09 22:07:13,775 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-01-09 22:07:13,775 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-01-09 22:07:13,776 INFO L153 SettingsManager]: * Use memory slicer=true [2025-01-09 22:07:13,776 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-01-09 22:07:13,776 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-01-09 22:07:13,777 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-01-09 22:07:13,777 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-01-09 22:07:13,777 INFO L153 SettingsManager]: * Use SBE=true [2025-01-09 22:07:13,777 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-01-09 22:07:13,777 INFO L153 SettingsManager]: * sizeof long=4 [2025-01-09 22:07:13,777 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-01-09 22:07:13,778 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-01-09 22:07:13,778 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-01-09 22:07:13,778 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-01-09 22:07:13,778 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-01-09 22:07:13,778 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-01-09 22:07:13,778 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-01-09 22:07:13,778 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-01-09 22:07:13,778 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-01-09 22:07:13,778 INFO L153 SettingsManager]: * sizeof long double=12 [2025-01-09 22:07:13,778 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-01-09 22:07:13,778 INFO L153 SettingsManager]: * Use constant arrays=true [2025-01-09 22:07:13,779 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-01-09 22:07:13,779 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-09 22:07:13,779 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-09 22:07:13,779 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-09 22:07:13,779 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 22:07:13,779 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-01-09 22:07:13,779 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-09 22:07:13,780 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-09 22:07:13,780 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-09 22:07:13,780 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 22:07:13,780 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-01-09 22:07:13,780 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-01-09 22:07:13,780 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-01-09 22:07:13,780 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-01-09 22:07:13,780 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-01-09 22:07:13,780 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-01-09 22:07:13,781 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-01-09 22:07:13,781 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-01-09 22:07:13,781 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 -> 1dc3813f801c08c10697b6f3aeaa3afb846521f0bb73d940036cc656d8340c66 [2025-01-09 22:07:14,011 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-01-09 22:07:14,029 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-01-09 22:07:14,030 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-01-09 22:07:14,031 INFO L270 PluginConnector]: Initializing CDTParser... [2025-01-09 22:07:14,032 INFO L274 PluginConnector]: CDTParser initialized [2025-01-09 22:07:14,033 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_strcpy_ground-2.i [2025-01-09 22:07:15,214 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/4eeb0ba8a/5db54e3a11b04c0c92193d1d5fc6052d/FLAG1536bf840 [2025-01-09 22:07:15,437 INFO L384 CDTParser]: Found 1 translation units. [2025-01-09 22:07:15,438 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/array-examples/standard_strcpy_ground-2.i [2025-01-09 22:07:15,444 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/4eeb0ba8a/5db54e3a11b04c0c92193d1d5fc6052d/FLAG1536bf840 [2025-01-09 22:07:15,750 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/4eeb0ba8a/5db54e3a11b04c0c92193d1d5fc6052d [2025-01-09 22:07:15,751 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-01-09 22:07:15,752 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-01-09 22:07:15,753 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-01-09 22:07:15,753 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-01-09 22:07:15,756 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-01-09 22:07:15,756 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 10:07:15" (1/1) ... [2025-01-09 22:07:15,757 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40b21774 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:07:15, skipping insertion in model container [2025-01-09 22:07:15,757 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 10:07:15" (1/1) ... [2025-01-09 22:07:15,765 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-01-09 22:07:15,864 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-09 22:07:15,871 INFO L200 MainTranslator]: Completed pre-run [2025-01-09 22:07:15,883 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-09 22:07:15,895 INFO L204 MainTranslator]: Completed translation [2025-01-09 22:07:15,896 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:07:15 WrapperNode [2025-01-09 22:07:15,896 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-01-09 22:07:15,897 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-01-09 22:07:15,898 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-01-09 22:07:15,898 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-01-09 22:07:15,901 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:07:15" (1/1) ... [2025-01-09 22:07:15,906 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:07:15" (1/1) ... [2025-01-09 22:07:15,919 INFO L138 Inliner]: procedures = 16, calls = 20, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 59 [2025-01-09 22:07:15,920 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-01-09 22:07:15,921 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-01-09 22:07:15,921 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-01-09 22:07:15,921 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-01-09 22:07:15,925 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:07:15" (1/1) ... [2025-01-09 22:07:15,925 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:07:15" (1/1) ... [2025-01-09 22:07:15,926 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:07:15" (1/1) ... [2025-01-09 22:07:15,937 INFO L175 MemorySlicer]: Split 8 memory accesses to 3 slices as follows [2, 4, 2]. 50 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2025-01-09 22:07:15,937 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:07:15" (1/1) ... [2025-01-09 22:07:15,937 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:07:15" (1/1) ... [2025-01-09 22:07:15,943 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:07:15" (1/1) ... [2025-01-09 22:07:15,943 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:07:15" (1/1) ... [2025-01-09 22:07:15,945 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:07:15" (1/1) ... [2025-01-09 22:07:15,945 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:07:15" (1/1) ... [2025-01-09 22:07:15,946 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:07:15" (1/1) ... [2025-01-09 22:07:15,947 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-01-09 22:07:15,947 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-01-09 22:07:15,947 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-01-09 22:07:15,947 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-01-09 22:07:15,948 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:07:15" (1/1) ... [2025-01-09 22:07:15,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 22:07:15,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 22:07:15,973 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 22:07:15,975 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 22:07:15,991 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-01-09 22:07:15,992 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-01-09 22:07:15,992 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-01-09 22:07:15,992 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-01-09 22:07:15,992 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-01-09 22:07:15,992 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-01-09 22:07:15,992 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-01-09 22:07:15,992 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2025-01-09 22:07:15,992 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-01-09 22:07:15,992 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-01-09 22:07:15,992 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-01-09 22:07:15,992 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-01-09 22:07:15,992 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-01-09 22:07:15,992 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-01-09 22:07:16,038 INFO L234 CfgBuilder]: Building ICFG [2025-01-09 22:07:16,040 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-01-09 22:07:16,155 INFO L? ?]: Removed 37 outVars from TransFormulas that were not future-live. [2025-01-09 22:07:16,155 INFO L283 CfgBuilder]: Performing block encoding [2025-01-09 22:07:16,161 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-01-09 22:07:16,162 INFO L312 CfgBuilder]: Removed 1 assume(true) statements. [2025-01-09 22:07:16,162 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 10:07:16 BoogieIcfgContainer [2025-01-09 22:07:16,162 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-01-09 22:07:16,163 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-01-09 22:07:16,163 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-01-09 22:07:16,166 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-01-09 22:07:16,167 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.01 10:07:15" (1/3) ... [2025-01-09 22:07:16,167 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59bdf3fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 10:07:16, skipping insertion in model container [2025-01-09 22:07:16,167 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:07:15" (2/3) ... [2025-01-09 22:07:16,167 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59bdf3fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 10:07:16, skipping insertion in model container [2025-01-09 22:07:16,168 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 10:07:16" (3/3) ... [2025-01-09 22:07:16,168 INFO L128 eAbstractionObserver]: Analyzing ICFG standard_strcpy_ground-2.i [2025-01-09 22:07:16,178 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-01-09 22:07:16,179 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG standard_strcpy_ground-2.i that has 1 procedures, 38 locations, 1 initial locations, 3 loop locations, and 14 error locations. [2025-01-09 22:07:16,201 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-01-09 22:07:16,208 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;@2122e779, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-01-09 22:07:16,209 INFO L334 AbstractCegarLoop]: Starting to check reachability of 14 error locations. [2025-01-09 22:07:16,211 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 37 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 22:07:16,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2025-01-09 22:07:16,214 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 22:07:16,214 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2025-01-09 22:07:16,214 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-01-09 22:07:16,217 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 22:07:16,217 INFO L85 PathProgramCache]: Analyzing trace with hash 925637, now seen corresponding path program 1 times [2025-01-09 22:07:16,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 22:07:16,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35993934] [2025-01-09 22:07:16,222 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:07:16,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 22:07:16,261 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 4 statements into 1 equivalence classes. [2025-01-09 22:07:16,274 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 4 of 4 statements. [2025-01-09 22:07:16,275 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:07:16,275 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:07:16,361 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 22:07:16,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 22:07:16,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35993934] [2025-01-09 22:07:16,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35993934] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 22:07:16,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 22:07:16,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-01-09 22:07:16,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918398833] [2025-01-09 22:07:16,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 22:07:16,367 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-01-09 22:07:16,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 22:07:16,380 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-01-09 22:07:16,381 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-01-09 22:07:16,382 INFO L87 Difference]: Start difference. First operand has 38 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 37 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 22:07:16,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 22:07:16,417 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2025-01-09 22:07:16,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-01-09 22:07:16,419 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2025-01-09 22:07:16,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 22:07:16,425 INFO L225 Difference]: With dead ends: 33 [2025-01-09 22:07:16,425 INFO L226 Difference]: Without dead ends: 31 [2025-01-09 22:07:16,426 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 22:07:16,428 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 24 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-09 22:07:16,429 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 23 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-09 22:07:16,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2025-01-09 22:07:16,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2025-01-09 22:07:16,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 30 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 22:07:16,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2025-01-09 22:07:16,449 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 4 [2025-01-09 22:07:16,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 22:07:16,449 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2025-01-09 22:07:16,450 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 22:07:16,450 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2025-01-09 22:07:16,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2025-01-09 22:07:16,450 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 22:07:16,450 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2025-01-09 22:07:16,450 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-01-09 22:07:16,450 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-01-09 22:07:16,451 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 22:07:16,451 INFO L85 PathProgramCache]: Analyzing trace with hash 925638, now seen corresponding path program 1 times [2025-01-09 22:07:16,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 22:07:16,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485607626] [2025-01-09 22:07:16,451 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:07:16,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 22:07:16,457 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 4 statements into 1 equivalence classes. [2025-01-09 22:07:16,462 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 4 of 4 statements. [2025-01-09 22:07:16,462 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:07:16,462 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:07:16,575 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 22:07:16,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 22:07:16,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485607626] [2025-01-09 22:07:16,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485607626] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 22:07:16,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 22:07:16,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-01-09 22:07:16,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616198485] [2025-01-09 22:07:16,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 22:07:16,576 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-01-09 22:07:16,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 22:07:16,577 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-01-09 22:07:16,578 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-01-09 22:07:16,578 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 22:07:16,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 22:07:16,618 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2025-01-09 22:07:16,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-01-09 22:07:16,618 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2025-01-09 22:07:16,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 22:07:16,619 INFO L225 Difference]: With dead ends: 34 [2025-01-09 22:07:16,619 INFO L226 Difference]: Without dead ends: 34 [2025-01-09 22:07:16,619 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 22:07:16,619 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 1 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-09 22:07:16,620 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 43 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-09 22:07:16,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2025-01-09 22:07:16,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2025-01-09 22:07:16,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 32 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 22:07:16,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2025-01-09 22:07:16,625 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 4 [2025-01-09 22:07:16,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 22:07:16,625 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2025-01-09 22:07:16,625 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 22:07:16,625 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2025-01-09 22:07:16,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2025-01-09 22:07:16,626 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 22:07:16,626 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2025-01-09 22:07:16,626 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-01-09 22:07:16,627 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-01-09 22:07:16,627 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 22:07:16,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1805828105, now seen corresponding path program 1 times [2025-01-09 22:07:16,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 22:07:16,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832826389] [2025-01-09 22:07:16,627 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:07:16,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 22:07:16,642 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-01-09 22:07:16,657 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-01-09 22:07:16,657 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:07:16,657 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:07:16,818 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 22:07:16,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 22:07:16,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832826389] [2025-01-09 22:07:16,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832826389] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 22:07:16,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79075591] [2025-01-09 22:07:16,819 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:07:16,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:07:16,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 22:07:16,824 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 22:07:16,825 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 22:07:16,861 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-01-09 22:07:16,869 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-01-09 22:07:16,869 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:07:16,869 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:07:16,870 INFO L256 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-01-09 22:07:16,873 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 22:07:16,912 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 13 treesize of output 1 [2025-01-09 22:07:16,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-01-09 22:07:16,917 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 treesize of output 3 [2025-01-09 22:07:16,953 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 22:07:16,953 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 22:07:17,001 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 22:07:17,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79075591] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 22:07:17,001 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 22:07:17,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2025-01-09 22:07:17,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069898438] [2025-01-09 22:07:17,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 22:07:17,002 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-01-09 22:07:17,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 22:07:17,002 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-01-09 22:07:17,002 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2025-01-09 22:07:17,002 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 22:07:17,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 22:07:17,062 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2025-01-09 22:07:17,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-01-09 22:07:17,063 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 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 22:07:17,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 22:07:17,064 INFO L225 Difference]: With dead ends: 41 [2025-01-09 22:07:17,064 INFO L226 Difference]: Without dead ends: 41 [2025-01-09 22:07:17,065 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2025-01-09 22:07:17,065 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 22 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-09 22:07:17,065 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 32 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-09 22:07:17,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2025-01-09 22:07:17,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2025-01-09 22:07:17,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 32 states have (on average 1.40625) internal successors, (45), 40 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 22:07:17,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2025-01-09 22:07:17,068 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 7 [2025-01-09 22:07:17,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 22:07:17,068 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2025-01-09 22:07:17,068 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 22:07:17,068 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2025-01-09 22:07:17,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2025-01-09 22:07:17,069 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 22:07:17,069 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1] [2025-01-09 22:07:17,075 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 22:07:17,273 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:07:17,273 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-01-09 22:07:17,274 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 22:07:17,277 INFO L85 PathProgramCache]: Analyzing trace with hash -1335323223, now seen corresponding path program 1 times [2025-01-09 22:07:17,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 22:07:17,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200994969] [2025-01-09 22:07:17,277 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:07:17,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 22:07:17,281 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-01-09 22:07:17,286 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-01-09 22:07:17,287 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:07:17,287 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:07:17,405 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 22:07:17,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 22:07:17,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200994969] [2025-01-09 22:07:17,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200994969] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 22:07:17,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017263485] [2025-01-09 22:07:17,406 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:07:17,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:07:17,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 22:07:17,407 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 22:07:17,409 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 22:07:17,437 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-01-09 22:07:17,448 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-01-09 22:07:17,448 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:07:17,448 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:07:17,449 INFO L256 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-01-09 22:07:17,450 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 22:07:17,477 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 22:07:17,478 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 22:07:17,511 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 22:07:17,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017263485] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 22:07:17,512 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 22:07:17,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 11 [2025-01-09 22:07:17,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853369891] [2025-01-09 22:07:17,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 22:07:17,513 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-01-09 22:07:17,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 22:07:17,514 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-01-09 22:07:17,514 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2025-01-09 22:07:17,515 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 22:07:17,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 22:07:17,688 INFO L93 Difference]: Finished difference Result 166 states and 192 transitions. [2025-01-09 22:07:17,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-01-09 22:07:17,689 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2025-01-09 22:07:17,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 22:07:17,690 INFO L225 Difference]: With dead ends: 166 [2025-01-09 22:07:17,690 INFO L226 Difference]: Without dead ends: 166 [2025-01-09 22:07:17,690 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2025-01-09 22:07:17,691 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 313 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-09 22:07:17,691 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [313 Valid, 107 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-09 22:07:17,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2025-01-09 22:07:17,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 47. [2025-01-09 22:07:17,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 38 states have (on average 1.3157894736842106) internal successors, (50), 46 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 22:07:17,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2025-01-09 22:07:17,710 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 10 [2025-01-09 22:07:17,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 22:07:17,711 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2025-01-09 22:07:17,711 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 22:07:17,711 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2025-01-09 22:07:17,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2025-01-09 22:07:17,711 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 22:07:17,711 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1] [2025-01-09 22:07:17,720 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-01-09 22:07:17,917 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:07:17,917 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-01-09 22:07:17,919 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 22:07:17,919 INFO L85 PathProgramCache]: Analyzing trace with hash 186561030, now seen corresponding path program 2 times [2025-01-09 22:07:17,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 22:07:17,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266415485] [2025-01-09 22:07:17,919 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 22:07:17,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 22:07:17,926 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-01-09 22:07:17,934 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-01-09 22:07:17,934 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 22:07:17,934 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:07:18,095 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 9 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 22:07:18,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 22:07:18,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266415485] [2025-01-09 22:07:18,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266415485] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 22:07:18,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581900342] [2025-01-09 22:07:18,096 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 22:07:18,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:07:18,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 22:07:18,098 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 22:07:18,100 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 22:07:18,127 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-01-09 22:07:18,137 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-01-09 22:07:18,138 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 22:07:18,138 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:07:18,138 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-01-09 22:07:18,140 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 22:07:18,157 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 13 treesize of output 1 [2025-01-09 22:07:18,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-01-09 22:07:18,160 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 treesize of output 3 [2025-01-09 22:07:18,246 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 22:07:18,246 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-09 22:07:18,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581900342] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 22:07:18,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-01-09 22:07:18,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 9 [2025-01-09 22:07:18,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948829480] [2025-01-09 22:07:18,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 22:07:18,246 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-01-09 22:07:18,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 22:07:18,247 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-01-09 22:07:18,247 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2025-01-09 22:07:18,247 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 22:07:18,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 22:07:18,383 INFO L93 Difference]: Finished difference Result 121 states and 142 transitions. [2025-01-09 22:07:18,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-01-09 22:07:18,383 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2025-01-09 22:07:18,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 22:07:18,384 INFO L225 Difference]: With dead ends: 121 [2025-01-09 22:07:18,384 INFO L226 Difference]: Without dead ends: 121 [2025-01-09 22:07:18,384 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2025-01-09 22:07:18,385 INFO L435 NwaCegarLoop]: 63 mSDtfsCounter, 96 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-09 22:07:18,385 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 172 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-09 22:07:18,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2025-01-09 22:07:18,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 46. [2025-01-09 22:07:18,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 38 states have (on average 1.263157894736842) internal successors, (48), 45 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 22:07:18,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2025-01-09 22:07:18,388 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 16 [2025-01-09 22:07:18,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 22:07:18,388 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2025-01-09 22:07:18,388 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 22:07:18,388 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2025-01-09 22:07:18,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2025-01-09 22:07:18,388 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 22:07:18,388 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 22:07:18,395 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-01-09 22:07:18,591 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:07:18,591 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-01-09 22:07:18,591 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 22:07:18,592 INFO L85 PathProgramCache]: Analyzing trace with hash 913276082, now seen corresponding path program 1 times [2025-01-09 22:07:18,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 22:07:18,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572103593] [2025-01-09 22:07:18,592 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:07:18,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 22:07:18,600 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-01-09 22:07:18,607 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-01-09 22:07:18,609 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:07:18,610 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:07:18,663 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2025-01-09 22:07:18,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 22:07:18,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572103593] [2025-01-09 22:07:18,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572103593] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 22:07:18,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 22:07:18,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-01-09 22:07:18,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752214614] [2025-01-09 22:07:18,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 22:07:18,665 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-01-09 22:07:18,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 22:07:18,665 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-01-09 22:07:18,665 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-01-09 22:07:18,665 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 22:07:18,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 22:07:18,678 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2025-01-09 22:07:18,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-01-09 22:07:18,678 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2025-01-09 22:07:18,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 22:07:18,678 INFO L225 Difference]: With dead ends: 44 [2025-01-09 22:07:18,679 INFO L226 Difference]: Without dead ends: 44 [2025-01-09 22:07:18,679 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 22:07:18,679 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 16 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-09 22:07:18,681 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 20 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-09 22:07:18,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2025-01-09 22:07:18,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2025-01-09 22:07:18,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 38 states have (on average 1.2105263157894737) internal successors, (46), 43 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 22:07:18,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2025-01-09 22:07:18,685 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 25 [2025-01-09 22:07:18,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 22:07:18,685 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2025-01-09 22:07:18,685 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 22:07:18,685 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2025-01-09 22:07:18,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2025-01-09 22:07:18,685 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 22:07:18,685 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 22:07:18,686 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-01-09 22:07:18,686 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-01-09 22:07:18,686 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 22:07:18,686 INFO L85 PathProgramCache]: Analyzing trace with hash 913276083, now seen corresponding path program 1 times [2025-01-09 22:07:18,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 22:07:18,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509586622] [2025-01-09 22:07:18,686 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:07:18,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 22:07:18,695 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-01-09 22:07:18,703 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-01-09 22:07:18,704 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:07:18,704 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:07:18,799 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 22:07:18,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 22:07:18,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509586622] [2025-01-09 22:07:18,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509586622] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 22:07:18,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926031125] [2025-01-09 22:07:18,799 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:07:18,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:07:18,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 22:07:18,802 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 22:07:18,804 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 22:07:18,837 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-01-09 22:07:18,854 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-01-09 22:07:18,854 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:07:18,854 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:07:18,855 INFO L256 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-01-09 22:07:18,856 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 22:07:18,895 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 22:07:18,896 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 22:07:19,005 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 22:07:19,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926031125] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 22:07:19,006 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 22:07:19,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2025-01-09 22:07:19,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35218850] [2025-01-09 22:07:19,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 22:07:19,006 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-01-09 22:07:19,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 22:07:19,007 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-01-09 22:07:19,007 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2025-01-09 22:07:19,007 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 22:07:19,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 22:07:19,194 INFO L93 Difference]: Finished difference Result 319 states and 376 transitions. [2025-01-09 22:07:19,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-01-09 22:07:19,195 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2025-01-09 22:07:19,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 22:07:19,196 INFO L225 Difference]: With dead ends: 319 [2025-01-09 22:07:19,198 INFO L226 Difference]: Without dead ends: 319 [2025-01-09 22:07:19,198 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2025-01-09 22:07:19,198 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 472 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-01-09 22:07:19,198 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [472 Valid, 238 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-01-09 22:07:19,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2025-01-09 22:07:19,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 68. [2025-01-09 22:07:19,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 62 states have (on average 1.1290322580645162) internal successors, (70), 67 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 22:07:19,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2025-01-09 22:07:19,204 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 25 [2025-01-09 22:07:19,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 22:07:19,204 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2025-01-09 22:07:19,208 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 22:07:19,208 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2025-01-09 22:07:19,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2025-01-09 22:07:19,209 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 22:07:19,209 INFO L218 NwaCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 22:07:19,217 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 22:07:19,409 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,SelfDestructingSolverStorable6 [2025-01-09 22:07:19,410 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-01-09 22:07:19,410 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 22:07:19,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1745385421, now seen corresponding path program 2 times [2025-01-09 22:07:19,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 22:07:19,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538624236] [2025-01-09 22:07:19,411 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 22:07:19,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 22:07:19,439 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 49 statements into 2 equivalence classes. [2025-01-09 22:07:19,451 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 7 of 49 statements. [2025-01-09 22:07:19,452 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-01-09 22:07:19,452 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:07:19,506 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2025-01-09 22:07:19,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 22:07:19,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538624236] [2025-01-09 22:07:19,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538624236] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 22:07:19,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 22:07:19,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-01-09 22:07:19,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447502774] [2025-01-09 22:07:19,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 22:07:19,507 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-01-09 22:07:19,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 22:07:19,508 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-01-09 22:07:19,508 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-01-09 22:07:19,508 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 22:07:19,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 22:07:19,544 INFO L93 Difference]: Finished difference Result 84 states and 89 transitions. [2025-01-09 22:07:19,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-01-09 22:07:19,545 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2025-01-09 22:07:19,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 22:07:19,545 INFO L225 Difference]: With dead ends: 84 [2025-01-09 22:07:19,545 INFO L226 Difference]: Without dead ends: 84 [2025-01-09 22:07:19,546 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2025-01-09 22:07:19,546 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 54 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-09 22:07:19,546 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 26 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-09 22:07:19,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2025-01-09 22:07:19,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 71. [2025-01-09 22:07:19,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 65 states have (on average 1.1384615384615384) internal successors, (74), 70 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 22:07:19,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 74 transitions. [2025-01-09 22:07:19,549 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 74 transitions. Word has length 49 [2025-01-09 22:07:19,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 22:07:19,549 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 74 transitions. [2025-01-09 22:07:19,549 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 22:07:19,549 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 74 transitions. [2025-01-09 22:07:19,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2025-01-09 22:07:19,550 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 22:07:19,550 INFO L218 NwaCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 22:07:19,550 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-01-09 22:07:19,550 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-01-09 22:07:19,551 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 22:07:19,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1727697173, now seen corresponding path program 1 times [2025-01-09 22:07:19,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 22:07:19,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625379803] [2025-01-09 22:07:19,551 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:07:19,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 22:07:19,560 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 50 statements into 1 equivalence classes. [2025-01-09 22:07:19,568 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 50 of 50 statements. [2025-01-09 22:07:19,568 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:07:19,568 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:07:19,771 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 22:07:19,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 22:07:19,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625379803] [2025-01-09 22:07:19,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625379803] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 22:07:19,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184082700] [2025-01-09 22:07:19,772 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:07:19,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:07:19,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 22:07:19,774 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 22:07:19,775 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 22:07:19,824 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 50 statements into 1 equivalence classes. [2025-01-09 22:07:19,847 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 50 of 50 statements. [2025-01-09 22:07:19,847 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:07:19,847 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:07:19,848 INFO L256 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-01-09 22:07:19,849 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 22:07:19,898 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 22:07:19,899 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 22:07:20,193 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 22:07:20,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184082700] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 22:07:20,193 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 22:07:20,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2025-01-09 22:07:20,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928912941] [2025-01-09 22:07:20,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 22:07:20,194 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2025-01-09 22:07:20,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 22:07:20,195 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2025-01-09 22:07:20,195 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2025-01-09 22:07:20,195 INFO L87 Difference]: Start difference. First operand 71 states and 74 transitions. Second operand has 33 states, 33 states have (on average 2.9696969696969697) internal successors, (98), 33 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 22:07:20,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 22:07:20,545 INFO L93 Difference]: Finished difference Result 655 states and 775 transitions. [2025-01-09 22:07:20,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2025-01-09 22:07:20,546 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.9696969696969697) internal successors, (98), 33 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2025-01-09 22:07:20,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 22:07:20,547 INFO L225 Difference]: With dead ends: 655 [2025-01-09 22:07:20,547 INFO L226 Difference]: Without dead ends: 655 [2025-01-09 22:07:20,548 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2025-01-09 22:07:20,548 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 1192 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1192 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-01-09 22:07:20,549 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1192 Valid, 464 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-01-09 22:07:20,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2025-01-09 22:07:20,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 119. [2025-01-09 22:07:20,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 113 states have (on average 1.079646017699115) internal successors, (122), 118 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 22:07:20,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 122 transitions. [2025-01-09 22:07:20,559 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 122 transitions. Word has length 50 [2025-01-09 22:07:20,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 22:07:20,560 INFO L471 AbstractCegarLoop]: Abstraction has 119 states and 122 transitions. [2025-01-09 22:07:20,560 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.9696969696969697) internal successors, (98), 33 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 22:07:20,560 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 122 transitions. [2025-01-09 22:07:20,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2025-01-09 22:07:20,561 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 22:07:20,561 INFO L218 NwaCegarLoop]: trace histogram [30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 22:07:20,567 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 22:07:20,766 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:07:20,766 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-01-09 22:07:20,767 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 22:07:20,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1340286443, now seen corresponding path program 2 times [2025-01-09 22:07:20,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 22:07:20,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823454677] [2025-01-09 22:07:20,767 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 22:07:20,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 22:07:20,791 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 98 statements into 2 equivalence classes. [2025-01-09 22:07:20,794 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 8 of 98 statements. [2025-01-09 22:07:20,794 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-01-09 22:07:20,794 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:07:20,838 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1335 trivial. 0 not checked. [2025-01-09 22:07:20,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 22:07:20,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823454677] [2025-01-09 22:07:20,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823454677] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 22:07:20,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 22:07:20,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-01-09 22:07:20,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643643176] [2025-01-09 22:07:20,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 22:07:20,839 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-01-09 22:07:20,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 22:07:20,839 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-01-09 22:07:20,839 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-01-09 22:07:20,839 INFO L87 Difference]: Start difference. First operand 119 states and 122 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 22:07:20,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 22:07:20,875 INFO L93 Difference]: Finished difference Result 118 states and 121 transitions. [2025-01-09 22:07:20,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-01-09 22:07:20,875 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2025-01-09 22:07:20,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 22:07:20,877 INFO L225 Difference]: With dead ends: 118 [2025-01-09 22:07:20,878 INFO L226 Difference]: Without dead ends: 117 [2025-01-09 22:07:20,878 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-01-09 22:07:20,878 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 14 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-09 22:07:20,878 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 32 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-09 22:07:20,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2025-01-09 22:07:20,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2025-01-09 22:07:20,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 112 states have (on average 1.0714285714285714) internal successors, (120), 116 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 22:07:20,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 120 transitions. [2025-01-09 22:07:20,883 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 120 transitions. Word has length 98 [2025-01-09 22:07:20,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 22:07:20,883 INFO L471 AbstractCegarLoop]: Abstraction has 117 states and 120 transitions. [2025-01-09 22:07:20,883 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 22:07:20,883 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 120 transitions. [2025-01-09 22:07:20,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2025-01-09 22:07:20,885 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 22:07:20,885 INFO L218 NwaCegarLoop]: trace histogram [30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 22:07:20,885 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2025-01-09 22:07:20,885 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-01-09 22:07:20,885 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 22:07:20,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1340287306, now seen corresponding path program 1 times [2025-01-09 22:07:20,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 22:07:20,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366324856] [2025-01-09 22:07:20,886 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:07:20,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 22:07:20,898 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 98 statements into 1 equivalence classes. [2025-01-09 22:07:20,910 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 98 of 98 statements. [2025-01-09 22:07:20,910 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:07:20,910 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:07:21,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1335 trivial. 0 not checked. [2025-01-09 22:07:21,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 22:07:21,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366324856] [2025-01-09 22:07:21,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366324856] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 22:07:21,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 22:07:21,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-01-09 22:07:21,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191252024] [2025-01-09 22:07:21,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 22:07:21,061 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-01-09 22:07:21,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 22:07:21,062 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-01-09 22:07:21,062 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-01-09 22:07:21,062 INFO L87 Difference]: Start difference. First operand 117 states and 120 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 22:07:21,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 22:07:21,079 INFO L93 Difference]: Finished difference Result 120 states and 122 transitions. [2025-01-09 22:07:21,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-01-09 22:07:21,080 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2025-01-09 22:07:21,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 22:07:21,080 INFO L225 Difference]: With dead ends: 120 [2025-01-09 22:07:21,081 INFO L226 Difference]: Without dead ends: 118 [2025-01-09 22:07:21,081 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-01-09 22:07:21,081 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 5 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-09 22:07:21,081 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 37 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-09 22:07:21,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2025-01-09 22:07:21,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2025-01-09 22:07:21,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 112 states have (on average 1.0625) internal successors, (119), 116 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 22:07:21,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 119 transitions. [2025-01-09 22:07:21,084 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 119 transitions. Word has length 98 [2025-01-09 22:07:21,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 22:07:21,084 INFO L471 AbstractCegarLoop]: Abstraction has 117 states and 119 transitions. [2025-01-09 22:07:21,084 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 22:07:21,084 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 119 transitions. [2025-01-09 22:07:21,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2025-01-09 22:07:21,085 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 22:07:21,085 INFO L218 NwaCegarLoop]: trace histogram [30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 22:07:21,085 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2025-01-09 22:07:21,085 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-01-09 22:07:21,085 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 22:07:21,086 INFO L85 PathProgramCache]: Analyzing trace with hash 1398610628, now seen corresponding path program 1 times [2025-01-09 22:07:21,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 22:07:21,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438143581] [2025-01-09 22:07:21,086 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:07:21,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 22:07:21,098 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 99 statements into 1 equivalence classes. [2025-01-09 22:07:21,126 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 99 of 99 statements. [2025-01-09 22:07:21,128 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:07:21,128 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:07:22,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1336 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 22:07:22,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 22:07:22,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438143581] [2025-01-09 22:07:22,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438143581] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 22:07:22,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352573523] [2025-01-09 22:07:22,188 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:07:22,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:07:22,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 22:07:22,191 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 22:07:22,192 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 22:07:22,256 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 99 statements into 1 equivalence classes. [2025-01-09 22:07:22,296 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 99 of 99 statements. [2025-01-09 22:07:22,296 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:07:22,296 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:07:22,298 INFO L256 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 32 conjuncts are in the unsatisfiable core [2025-01-09 22:07:22,300 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 22:07:22,482 INFO L134 CoverageAnalysis]: Checked inductivity of 1336 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 22:07:22,482 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 22:07:23,627 INFO L134 CoverageAnalysis]: Checked inductivity of 1336 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 22:07:23,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352573523] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 22:07:23,627 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 22:07:23,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 65 [2025-01-09 22:07:23,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392192894] [2025-01-09 22:07:23,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 22:07:23,629 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2025-01-09 22:07:23,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 22:07:23,631 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2025-01-09 22:07:23,633 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2025-01-09 22:07:23,633 INFO L87 Difference]: Start difference. First operand 117 states and 119 transitions. Second operand has 65 states, 65 states have (on average 3.0) internal successors, (195), 65 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 22:07:25,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 22:07:25,131 INFO L93 Difference]: Finished difference Result 1312 states and 1497 transitions. [2025-01-09 22:07:25,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2025-01-09 22:07:25,131 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 3.0) internal successors, (195), 65 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2025-01-09 22:07:25,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 22:07:25,135 INFO L225 Difference]: With dead ends: 1312 [2025-01-09 22:07:25,135 INFO L226 Difference]: Without dead ends: 1312 [2025-01-09 22:07:25,136 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2025-01-09 22:07:25,136 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 4286 mSDsluCounter, 889 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 243 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4286 SdHoareTripleChecker+Valid, 906 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 243 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-01-09 22:07:25,137 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4286 Valid, 906 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [243 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-01-09 22:07:25,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1312 states. [2025-01-09 22:07:25,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1312 to 213. [2025-01-09 22:07:25,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 208 states have (on average 1.0336538461538463) internal successors, (215), 212 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 22:07:25,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 215 transitions. [2025-01-09 22:07:25,146 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 215 transitions. Word has length 99 [2025-01-09 22:07:25,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 22:07:25,146 INFO L471 AbstractCegarLoop]: Abstraction has 213 states and 215 transitions. [2025-01-09 22:07:25,146 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 3.0) internal successors, (195), 65 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 22:07:25,146 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 215 transitions. [2025-01-09 22:07:25,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2025-01-09 22:07:25,148 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 22:07:25,148 INFO L218 NwaCegarLoop]: trace histogram [62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 22:07:25,157 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-01-09 22:07:25,348 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,SelfDestructingSolverStorable11 [2025-01-09 22:07:25,349 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-01-09 22:07:25,350 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 22:07:25,350 INFO L85 PathProgramCache]: Analyzing trace with hash 179095748, now seen corresponding path program 2 times [2025-01-09 22:07:25,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 22:07:25,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634670135] [2025-01-09 22:07:25,350 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 22:07:25,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 22:07:25,406 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 195 statements into 2 equivalence classes. [2025-01-09 22:07:25,481 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 195 of 195 statements. [2025-01-09 22:07:25,481 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 22:07:25,481 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:07:28,116 INFO L134 CoverageAnalysis]: Checked inductivity of 5736 backedges. 0 proven. 5735 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 22:07:28,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 22:07:28,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634670135] [2025-01-09 22:07:28,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634670135] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 22:07:28,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913886006] [2025-01-09 22:07:28,117 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 22:07:28,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:07:28,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 22:07:28,119 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 22:07:28,121 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 22:07:28,196 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 195 statements into 2 equivalence classes. [2025-01-09 22:07:28,286 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 195 of 195 statements. [2025-01-09 22:07:28,286 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 22:07:28,286 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:07:28,290 INFO L256 TraceCheckSpWp]: Trace formula consists of 875 conjuncts, 64 conjuncts are in the unsatisfiable core [2025-01-09 22:07:28,294 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 22:07:28,485 INFO L134 CoverageAnalysis]: Checked inductivity of 5736 backedges. 0 proven. 5735 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 22:07:28,485 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 22:07:32,159 INFO L134 CoverageAnalysis]: Checked inductivity of 5736 backedges. 0 proven. 5735 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 22:07:32,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913886006] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 22:07:32,160 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 22:07:32,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 129 [2025-01-09 22:07:32,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832368177] [2025-01-09 22:07:32,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 22:07:32,162 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2025-01-09 22:07:32,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 22:07:32,165 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2025-01-09 22:07:32,168 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8256, Invalid=8256, Unknown=0, NotChecked=0, Total=16512 [2025-01-09 22:07:32,169 INFO L87 Difference]: Start difference. First operand 213 states and 215 transitions. Second operand has 129 states, 129 states have (on average 3.0) internal successors, (387), 129 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 22:07:44,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 22:07:44,447 INFO L93 Difference]: Finished difference Result 2656 states and 3033 transitions. [2025-01-09 22:07:44,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2025-01-09 22:07:44,447 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 3.0) internal successors, (387), 129 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2025-01-09 22:07:44,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 22:07:44,463 INFO L225 Difference]: With dead ends: 2656 [2025-01-09 22:07:44,467 INFO L226 Difference]: Without dead ends: 2656 [2025-01-09 22:07:44,470 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=8256, Invalid=8256, Unknown=0, NotChecked=0, Total=16512 [2025-01-09 22:07:44,470 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 9686 mSDsluCounter, 1786 mSDsCounter, 0 mSdLazyCounter, 1040 mSolverCounterSat, 543 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9686 SdHoareTripleChecker+Valid, 1803 SdHoareTripleChecker+Invalid, 1583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 543 IncrementalHoareTripleChecker+Valid, 1040 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2025-01-09 22:07:44,471 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9686 Valid, 1803 Invalid, 1583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [543 Valid, 1040 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2025-01-09 22:07:44,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2656 states. [2025-01-09 22:07:44,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2656 to 405. [2025-01-09 22:07:44,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 400 states have (on average 1.0175) internal successors, (407), 404 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 22:07:44,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 407 transitions. [2025-01-09 22:07:44,503 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 407 transitions. Word has length 195 [2025-01-09 22:07:44,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 22:07:44,504 INFO L471 AbstractCegarLoop]: Abstraction has 405 states and 407 transitions. [2025-01-09 22:07:44,504 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 129 states have (on average 3.0) internal successors, (387), 129 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 22:07:44,504 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 407 transitions. [2025-01-09 22:07:44,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2025-01-09 22:07:44,513 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 22:07:44,514 INFO L218 NwaCegarLoop]: trace histogram [126, 126, 126, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 22:07:44,530 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-01-09 22:07:44,720 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:07:44,720 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-01-09 22:07:44,721 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 22:07:44,721 INFO L85 PathProgramCache]: Analyzing trace with hash 223618244, now seen corresponding path program 3 times [2025-01-09 22:07:44,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 22:07:44,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784809428] [2025-01-09 22:07:44,721 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 22:07:44,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 22:07:44,787 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 387 statements into 127 equivalence classes. [2025-01-09 22:07:44,815 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 12 of 387 statements. [2025-01-09 22:07:44,815 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-01-09 22:07:44,815 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:07:44,884 INFO L134 CoverageAnalysis]: Checked inductivity of 23752 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 23751 trivial. 0 not checked. [2025-01-09 22:07:44,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 22:07:44,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784809428] [2025-01-09 22:07:44,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784809428] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 22:07:44,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831908620] [2025-01-09 22:07:44,884 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 22:07:44,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:07:44,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 22:07:44,886 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 22:07:44,888 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 22:07:45,015 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 387 statements into 127 equivalence classes. [2025-01-09 22:07:45,024 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 12 of 387 statements. [2025-01-09 22:07:45,024 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-01-09 22:07:45,024 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:07:45,025 INFO L256 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-01-09 22:07:45,032 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 22:07:45,408 INFO L134 CoverageAnalysis]: Checked inductivity of 23752 backedges. 251 proven. 1 refuted. 0 times theorem prover too weak. 23500 trivial. 0 not checked. [2025-01-09 22:07:45,408 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 22:07:45,483 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 7 treesize of output 5 [2025-01-09 22:07:45,828 INFO L134 CoverageAnalysis]: Checked inductivity of 23752 backedges. 0 proven. 252 refuted. 0 times theorem prover too weak. 23500 trivial. 0 not checked. [2025-01-09 22:07:45,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831908620] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 22:07:45,828 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 22:07:45,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 14 [2025-01-09 22:07:45,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116214797] [2025-01-09 22:07:45,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 22:07:45,829 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-01-09 22:07:45,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 22:07:45,829 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-01-09 22:07:45,829 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2025-01-09 22:07:45,829 INFO L87 Difference]: Start difference. First operand 405 states and 407 transitions. Second operand has 15 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 22:07:45,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 22:07:45,949 INFO L93 Difference]: Finished difference Result 442 states and 449 transitions. [2025-01-09 22:07:45,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-01-09 22:07:45,949 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 387 [2025-01-09 22:07:45,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 22:07:45,950 INFO L225 Difference]: With dead ends: 442 [2025-01-09 22:07:45,950 INFO L226 Difference]: Without dead ends: 442 [2025-01-09 22:07:45,951 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 781 GetRequests, 763 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=146, Invalid=234, Unknown=0, NotChecked=0, Total=380 [2025-01-09 22:07:45,951 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 202 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-09 22:07:45,952 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 65 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-09 22:07:45,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2025-01-09 22:07:45,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 417. [2025-01-09 22:07:45,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 412 states have (on average 1.0266990291262137) internal successors, (423), 416 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 22:07:45,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 423 transitions. [2025-01-09 22:07:45,960 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 423 transitions. Word has length 387 [2025-01-09 22:07:45,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 22:07:45,960 INFO L471 AbstractCegarLoop]: Abstraction has 417 states and 423 transitions. [2025-01-09 22:07:45,961 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 22:07:45,961 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 423 transitions. [2025-01-09 22:07:45,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2025-01-09 22:07:45,964 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 22:07:45,964 INFO L218 NwaCegarLoop]: trace histogram [126, 126, 126, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2025-01-09 22:07:45,973 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 22:07:46,164 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:07:46,165 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-01-09 22:07:46,165 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 22:07:46,165 INFO L85 PathProgramCache]: Analyzing trace with hash 316792312, now seen corresponding path program 1 times [2025-01-09 22:07:46,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 22:07:46,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622936342] [2025-01-09 22:07:46,166 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:07:46,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 22:07:46,204 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 390 statements into 1 equivalence classes. [2025-01-09 22:07:46,326 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 390 of 390 statements. [2025-01-09 22:07:46,327 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:07:46,327 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:07:54,667 INFO L134 CoverageAnalysis]: Checked inductivity of 23755 backedges. 0 proven. 23751 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-01-09 22:07:54,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 22:07:54,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622936342] [2025-01-09 22:07:54,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622936342] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 22:07:54,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256807346] [2025-01-09 22:07:54,668 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:07:54,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:07:54,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 22:07:54,670 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 22:07:54,701 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 22:07:54,830 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 390 statements into 1 equivalence classes. [2025-01-09 22:07:54,967 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 390 of 390 statements. [2025-01-09 22:07:54,967 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:07:54,967 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:07:54,981 INFO L256 TraceCheckSpWp]: Trace formula consists of 1720 conjuncts, 128 conjuncts are in the unsatisfiable core [2025-01-09 22:07:54,987 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 22:07:55,311 INFO L134 CoverageAnalysis]: Checked inductivity of 23755 backedges. 0 proven. 23751 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-01-09 22:07:55,312 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 22:08:09,514 INFO L134 CoverageAnalysis]: Checked inductivity of 23755 backedges. 0 proven. 23751 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-01-09 22:08:09,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256807346] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 22:08:09,514 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 22:08:09,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [129, 129, 129] total 257 [2025-01-09 22:08:09,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479180425] [2025-01-09 22:08:09,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 22:08:09,515 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 257 states [2025-01-09 22:08:09,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 22:08:09,529 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 257 interpolants. [2025-01-09 22:08:09,535 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=32896, Invalid=32896, Unknown=0, NotChecked=0, Total=65792 [2025-01-09 22:08:09,536 INFO L87 Difference]: Start difference. First operand 417 states and 423 transitions. Second operand has 257 states, 257 states have (on average 3.0) internal successors, (771), 257 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)