./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-examples/sanfoundry_24-2.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/sanfoundry_24-2.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 7e3ff0b77765ac98635f2070c186c57a6cae0bb79eb8bc9016d9d716e81867aa --- Real Ultimate output --- This is Ultimate 0.3.0-?-551b009-m [2025-01-09 22:07:14,043 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-01-09 22:07:14,102 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-01-09 22:07:14,107 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-01-09 22:07:14,107 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-01-09 22:07:14,131 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-01-09 22:07:14,131 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-01-09 22:07:14,131 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-01-09 22:07:14,132 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-01-09 22:07:14,132 INFO L153 SettingsManager]: * Use memory slicer=true [2025-01-09 22:07:14,132 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-01-09 22:07:14,132 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-01-09 22:07:14,133 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-01-09 22:07:14,133 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-01-09 22:07:14,133 INFO L153 SettingsManager]: * Use SBE=true [2025-01-09 22:07:14,133 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-01-09 22:07:14,133 INFO L153 SettingsManager]: * sizeof long=4 [2025-01-09 22:07:14,133 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-01-09 22:07:14,133 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-01-09 22:07:14,133 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-01-09 22:07:14,133 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-01-09 22:07:14,134 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-01-09 22:07:14,134 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-01-09 22:07:14,134 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-01-09 22:07:14,134 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-01-09 22:07:14,134 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-01-09 22:07:14,134 INFO L153 SettingsManager]: * sizeof long double=12 [2025-01-09 22:07:14,134 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-01-09 22:07:14,134 INFO L153 SettingsManager]: * Use constant arrays=true [2025-01-09 22:07:14,134 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-01-09 22:07:14,134 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-09 22:07:14,134 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-09 22:07:14,134 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-09 22:07:14,134 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 22:07:14,135 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-01-09 22:07:14,135 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-09 22:07:14,135 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-09 22:07:14,135 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-09 22:07:14,135 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 22:07:14,135 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-01-09 22:07:14,135 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-01-09 22:07:14,135 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-01-09 22:07:14,135 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-01-09 22:07:14,135 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-01-09 22:07:14,135 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-01-09 22:07:14,137 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-01-09 22:07:14,137 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-01-09 22:07:14,137 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 -> 7e3ff0b77765ac98635f2070c186c57a6cae0bb79eb8bc9016d9d716e81867aa [2025-01-09 22:07:14,412 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-01-09 22:07:14,421 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-01-09 22:07:14,424 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-01-09 22:07:14,426 INFO L270 PluginConnector]: Initializing CDTParser... [2025-01-09 22:07:14,426 INFO L274 PluginConnector]: CDTParser initialized [2025-01-09 22:07:14,428 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/sanfoundry_24-2.i [2025-01-09 22:07:15,733 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/ce30605e7/2fa373e1f2784d33a1029308784d2ca2/FLAGe7006cd3c [2025-01-09 22:07:16,043 INFO L384 CDTParser]: Found 1 translation units. [2025-01-09 22:07:16,044 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/array-examples/sanfoundry_24-2.i [2025-01-09 22:07:16,052 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/ce30605e7/2fa373e1f2784d33a1029308784d2ca2/FLAGe7006cd3c [2025-01-09 22:07:16,072 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/ce30605e7/2fa373e1f2784d33a1029308784d2ca2 [2025-01-09 22:07:16,074 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-01-09 22:07:16,076 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-01-09 22:07:16,078 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-01-09 22:07:16,079 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-01-09 22:07:16,083 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-01-09 22:07:16,084 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 10:07:16" (1/1) ... [2025-01-09 22:07:16,085 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d042d00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:07:16, skipping insertion in model container [2025-01-09 22:07:16,085 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 10:07:16" (1/1) ... [2025-01-09 22:07:16,100 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-01-09 22:07:16,231 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-09 22:07:16,241 INFO L200 MainTranslator]: Completed pre-run [2025-01-09 22:07:16,256 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-09 22:07:16,267 INFO L204 MainTranslator]: Completed translation [2025-01-09 22:07:16,267 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:07:16 WrapperNode [2025-01-09 22:07:16,267 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-01-09 22:07:16,268 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-01-09 22:07:16,268 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-01-09 22:07:16,268 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-01-09 22:07:16,273 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:07:16" (1/1) ... [2025-01-09 22:07:16,279 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:07:16" (1/1) ... [2025-01-09 22:07:16,303 INFO L138 Inliner]: procedures = 18, calls = 19, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 64 [2025-01-09 22:07:16,304 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-01-09 22:07:16,305 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-01-09 22:07:16,305 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-01-09 22:07:16,305 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-01-09 22:07:16,313 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:07:16" (1/1) ... [2025-01-09 22:07:16,313 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:07:16" (1/1) ... [2025-01-09 22:07:16,316 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:07:16" (1/1) ... [2025-01-09 22:07:16,336 INFO L175 MemorySlicer]: Split 7 memory accesses to 2 slices as follows [2, 5]. 71 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2025-01-09 22:07:16,337 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:07:16" (1/1) ... [2025-01-09 22:07:16,337 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:07:16" (1/1) ... [2025-01-09 22:07:16,342 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:07:16" (1/1) ... [2025-01-09 22:07:16,345 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:07:16" (1/1) ... [2025-01-09 22:07:16,353 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:07:16" (1/1) ... [2025-01-09 22:07:16,354 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:07:16" (1/1) ... [2025-01-09 22:07:16,354 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:07:16" (1/1) ... [2025-01-09 22:07:16,356 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-01-09 22:07:16,356 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-01-09 22:07:16,361 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-01-09 22:07:16,361 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-01-09 22:07:16,362 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:07:16" (1/1) ... [2025-01-09 22:07:16,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 22:07:16,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 22:07:16,396 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 22:07:16,399 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 22:07:16,423 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-01-09 22:07:16,423 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-01-09 22:07:16,423 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-01-09 22:07:16,423 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-01-09 22:07:16,424 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-01-09 22:07:16,424 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-01-09 22:07:16,424 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-01-09 22:07:16,424 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-01-09 22:07:16,424 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-01-09 22:07:16,424 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-01-09 22:07:16,424 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2025-01-09 22:07:16,425 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2025-01-09 22:07:16,425 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-01-09 22:07:16,494 INFO L234 CfgBuilder]: Building ICFG [2025-01-09 22:07:16,495 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-01-09 22:07:16,730 INFO L? ?]: Removed 33 outVars from TransFormulas that were not future-live. [2025-01-09 22:07:16,730 INFO L283 CfgBuilder]: Performing block encoding [2025-01-09 22:07:16,741 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-01-09 22:07:16,742 INFO L312 CfgBuilder]: Removed 0 assume(true) statements. [2025-01-09 22:07:16,742 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 10:07:16 BoogieIcfgContainer [2025-01-09 22:07:16,742 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-01-09 22:07:16,745 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-01-09 22:07:16,745 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-01-09 22:07:16,749 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-01-09 22:07:16,749 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.01 10:07:16" (1/3) ... [2025-01-09 22:07:16,751 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b74d8bb 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 22:07:16,751 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:07:16" (2/3) ... [2025-01-09 22:07:16,752 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b74d8bb 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 22:07:16,752 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 22:07:16,753 INFO L128 eAbstractionObserver]: Analyzing ICFG sanfoundry_24-2.i [2025-01-09 22:07:16,767 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-01-09 22:07:16,770 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG sanfoundry_24-2.i that has 2 procedures, 44 locations, 1 initial locations, 3 loop locations, and 12 error locations. [2025-01-09 22:07:16,806 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-01-09 22:07:16,817 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;@48a90e9c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-01-09 22:07:16,818 INFO L334 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2025-01-09 22:07:16,821 INFO L276 IsEmpty]: Start isEmpty. Operand has 44 states, 28 states have (on average 1.6785714285714286) internal successors, (47), 40 states have internal predecessors, (47), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-01-09 22:07:16,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2025-01-09 22:07:16,825 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 22:07:16,826 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2025-01-09 22:07:16,826 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2025-01-09 22:07:16,830 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 22:07:16,830 INFO L85 PathProgramCache]: Analyzing trace with hash 925637, now seen corresponding path program 1 times [2025-01-09 22:07:16,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 22:07:16,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934128974] [2025-01-09 22:07:16,835 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:07:16,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 22:07:16,881 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 4 statements into 1 equivalence classes. [2025-01-09 22:07:16,896 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 4 of 4 statements. [2025-01-09 22:07:16,897 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:07:16,897 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:07:17,014 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 22:07:17,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 22:07:17,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934128974] [2025-01-09 22:07:17,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934128974] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 22:07:17,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 22:07:17,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-01-09 22:07:17,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607404173] [2025-01-09 22:07:17,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 22:07:17,021 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-01-09 22:07:17,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 22:07:17,044 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-01-09 22:07:17,045 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-01-09 22:07:17,046 INFO L87 Difference]: Start difference. First operand has 44 states, 28 states have (on average 1.6785714285714286) internal successors, (47), 40 states have internal predecessors, (47), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 2 states have (on average 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 22:07:17,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 22:07:17,122 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2025-01-09 22:07:17,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-01-09 22:07:17,125 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 22:07:17,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 22:07:17,129 INFO L225 Difference]: With dead ends: 38 [2025-01-09 22:07:17,130 INFO L226 Difference]: Without dead ends: 36 [2025-01-09 22:07:17,131 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 22:07:17,135 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 20 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-09 22:07:17,136 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 40 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-09 22:07:17,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2025-01-09 22:07:17,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2025-01-09 22:07:17,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 32 states have internal predecessors, (37), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-01-09 22:07:17,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2025-01-09 22:07:17,167 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 4 [2025-01-09 22:07:17,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 22:07:17,167 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2025-01-09 22:07:17,168 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 22:07:17,168 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2025-01-09 22:07:17,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2025-01-09 22:07:17,168 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 22:07:17,168 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2025-01-09 22:07:17,168 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-01-09 22:07:17,168 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2025-01-09 22:07:17,169 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 22:07:17,169 INFO L85 PathProgramCache]: Analyzing trace with hash 925638, now seen corresponding path program 1 times [2025-01-09 22:07:17,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 22:07:17,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114766594] [2025-01-09 22:07:17,169 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:07:17,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 22:07:17,175 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 4 statements into 1 equivalence classes. [2025-01-09 22:07:17,181 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 4 of 4 statements. [2025-01-09 22:07:17,181 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:07:17,181 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:07:17,256 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 22:07:17,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 22:07:17,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114766594] [2025-01-09 22:07:17,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114766594] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 22:07:17,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 22:07:17,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-01-09 22:07:17,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064478368] [2025-01-09 22:07:17,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 22:07:17,258 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-01-09 22:07:17,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 22:07:17,260 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-01-09 22:07:17,260 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-01-09 22:07:17,260 INFO L87 Difference]: Start difference. First operand 36 states and 41 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 22:07:17,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 22:07:17,324 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2025-01-09 22:07:17,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-01-09 22:07:17,325 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 22:07:17,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 22:07:17,326 INFO L225 Difference]: With dead ends: 55 [2025-01-09 22:07:17,327 INFO L226 Difference]: Without dead ends: 55 [2025-01-09 22:07:17,327 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 22:07:17,328 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 15 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-09 22:07:17,328 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 45 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-09 22:07:17,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2025-01-09 22:07:17,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 46. [2025-01-09 22:07:17,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 36 states have (on average 1.4444444444444444) internal successors, (52), 42 states have internal predecessors, (52), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-01-09 22:07:17,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2025-01-09 22:07:17,336 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 4 [2025-01-09 22:07:17,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 22:07:17,337 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2025-01-09 22:07:17,337 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 22:07:17,337 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2025-01-09 22:07:17,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2025-01-09 22:07:17,337 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 22:07:17,337 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2025-01-09 22:07:17,337 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-01-09 22:07:17,337 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2025-01-09 22:07:17,338 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 22:07:17,338 INFO L85 PathProgramCache]: Analyzing trace with hash 889743708, now seen corresponding path program 1 times [2025-01-09 22:07:17,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 22:07:17,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593501108] [2025-01-09 22:07:17,338 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:07:17,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 22:07:17,345 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-01-09 22:07:17,350 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-01-09 22:07:17,351 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:07:17,351 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:07:17,447 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 22:07:17,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 22:07:17,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593501108] [2025-01-09 22:07:17,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593501108] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 22:07:17,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 22:07:17,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-01-09 22:07:17,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242939895] [2025-01-09 22:07:17,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 22:07:17,449 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-01-09 22:07:17,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 22:07:17,449 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-01-09 22:07:17,449 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-01-09 22:07:17,450 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 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 22:07:17,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 22:07:17,499 INFO L93 Difference]: Finished difference Result 45 states and 55 transitions. [2025-01-09 22:07:17,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-01-09 22:07:17,500 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 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 6 [2025-01-09 22:07:17,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 22:07:17,500 INFO L225 Difference]: With dead ends: 45 [2025-01-09 22:07:17,500 INFO L226 Difference]: Without dead ends: 44 [2025-01-09 22:07:17,500 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 22:07:17,501 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 19 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-09 22:07:17,501 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 59 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-09 22:07:17,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2025-01-09 22:07:17,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2025-01-09 22:07:17,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 35 states have (on average 1.4) internal successors, (49), 40 states have internal predecessors, (49), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-01-09 22:07:17,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2025-01-09 22:07:17,506 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 6 [2025-01-09 22:07:17,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 22:07:17,506 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2025-01-09 22:07:17,506 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 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 22:07:17,506 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2025-01-09 22:07:17,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2025-01-09 22:07:17,507 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 22:07:17,507 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2025-01-09 22:07:17,507 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-01-09 22:07:17,507 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2025-01-09 22:07:17,508 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 22:07:17,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1805828105, now seen corresponding path program 1 times [2025-01-09 22:07:17,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 22:07:17,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649651024] [2025-01-09 22:07:17,508 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:07:17,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 22:07:17,519 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-01-09 22:07:17,531 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-01-09 22:07:17,531 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:07:17,531 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:07:17,682 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 22:07:17,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 22:07:17,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649651024] [2025-01-09 22:07:17,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649651024] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 22:07:17,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853435558] [2025-01-09 22:07:17,682 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:07:17,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:07:17,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 22:07:17,685 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 22:07:17,688 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 22:07:17,727 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-01-09 22:07:17,736 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-01-09 22:07:17,736 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:07:17,737 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:07:17,738 INFO L256 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-01-09 22:07:17,742 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 22:07:17,792 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-01-09 22:07:17,882 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 22:07:17,882 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 22:07:17,980 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 22:07:17,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853435558] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 22:07:17,981 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 22:07:17,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2025-01-09 22:07:17,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194839216] [2025-01-09 22:07:17,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 22:07:17,982 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-01-09 22:07:17,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 22:07:17,982 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-01-09 22:07:17,982 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2025-01-09 22:07:17,983 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 states have internal predecessors, (19), 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 22:07:18,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 22:07:18,237 INFO L93 Difference]: Finished difference Result 103 states and 131 transitions. [2025-01-09 22:07:18,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-01-09 22:07:18,238 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 states have internal predecessors, (19), 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 22:07:18,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 22:07:18,239 INFO L225 Difference]: With dead ends: 103 [2025-01-09 22:07:18,239 INFO L226 Difference]: Without dead ends: 103 [2025-01-09 22:07:18,239 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2025-01-09 22:07:18,240 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 60 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-01-09 22:07:18,240 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 112 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-01-09 22:07:18,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2025-01-09 22:07:18,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 95. [2025-01-09 22:07:18,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 82 states have (on average 1.2682926829268293) internal successors, (104), 85 states have internal predecessors, (104), 8 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2025-01-09 22:07:18,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 120 transitions. [2025-01-09 22:07:18,249 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 120 transitions. Word has length 7 [2025-01-09 22:07:18,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 22:07:18,249 INFO L471 AbstractCegarLoop]: Abstraction has 95 states and 120 transitions. [2025-01-09 22:07:18,249 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 states have internal predecessors, (19), 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 22:07:18,249 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 120 transitions. [2025-01-09 22:07:18,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2025-01-09 22:07:18,250 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 22:07:18,250 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1] [2025-01-09 22:07:18,258 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 22:07:18,453 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:07:18,454 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2025-01-09 22:07:18,454 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 22:07:18,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1554653004, now seen corresponding path program 1 times [2025-01-09 22:07:18,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 22:07:18,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528453661] [2025-01-09 22:07:18,455 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:07:18,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 22:07:18,460 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-01-09 22:07:18,466 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-01-09 22:07:18,466 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:07:18,467 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:07:18,557 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 22:07:18,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 22:07:18,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528453661] [2025-01-09 22:07:18,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528453661] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 22:07:18,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844735901] [2025-01-09 22:07:18,557 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:07:18,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:07:18,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 22:07:18,560 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 22:07:18,561 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 22:07:18,593 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-01-09 22:07:18,603 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-01-09 22:07:18,604 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:07:18,604 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:07:18,605 INFO L256 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-01-09 22:07:18,606 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 22:07:18,718 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 22:07:18,718 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 22:07:18,802 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 22 treesize of output 18 [2025-01-09 22:07:18,860 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 22:07:18,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844735901] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 22:07:18,861 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 22:07:18,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 11 [2025-01-09 22:07:18,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167715715] [2025-01-09 22:07:18,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 22:07:18,862 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-01-09 22:07:18,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 22:07:18,863 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-01-09 22:07:18,863 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2025-01-09 22:07:18,863 INFO L87 Difference]: Start difference. First operand 95 states and 120 transitions. Second operand has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 12 states have internal predecessors, (30), 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 22:07:19,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 22:07:19,044 INFO L93 Difference]: Finished difference Result 115 states and 146 transitions. [2025-01-09 22:07:19,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-01-09 22:07:19,045 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 12 states have internal predecessors, (30), 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 11 [2025-01-09 22:07:19,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 22:07:19,046 INFO L225 Difference]: With dead ends: 115 [2025-01-09 22:07:19,046 INFO L226 Difference]: Without dead ends: 115 [2025-01-09 22:07:19,046 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2025-01-09 22:07:19,047 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 195 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-09 22:07:19,047 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 103 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-09 22:07:19,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2025-01-09 22:07:19,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 95. [2025-01-09 22:07:19,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 82 states have (on average 1.2682926829268293) internal successors, (104), 85 states have internal predecessors, (104), 8 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2025-01-09 22:07:19,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 120 transitions. [2025-01-09 22:07:19,058 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 120 transitions. Word has length 11 [2025-01-09 22:07:19,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 22:07:19,058 INFO L471 AbstractCegarLoop]: Abstraction has 95 states and 120 transitions. [2025-01-09 22:07:19,059 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 12 states have internal predecessors, (30), 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 22:07:19,059 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 120 transitions. [2025-01-09 22:07:19,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2025-01-09 22:07:19,059 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 22:07:19,059 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 22:07:19,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-01-09 22:07:19,260 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:07:19,260 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2025-01-09 22:07:19,261 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 22:07:19,261 INFO L85 PathProgramCache]: Analyzing trace with hash 476295711, now seen corresponding path program 1 times [2025-01-09 22:07:19,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 22:07:19,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219807280] [2025-01-09 22:07:19,261 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:07:19,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 22:07:19,267 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-01-09 22:07:19,278 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-01-09 22:07:19,279 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:07:19,279 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:07:19,335 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 22:07:19,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 22:07:19,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219807280] [2025-01-09 22:07:19,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219807280] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 22:07:19,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 22:07:19,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-01-09 22:07:19,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365998063] [2025-01-09 22:07:19,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 22:07:19,336 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-01-09 22:07:19,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 22:07:19,337 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-01-09 22:07:19,337 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-01-09 22:07:19,337 INFO L87 Difference]: Start difference. First operand 95 states and 120 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 22:07:19,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 22:07:19,400 INFO L93 Difference]: Finished difference Result 114 states and 142 transitions. [2025-01-09 22:07:19,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-01-09 22:07:19,400 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2025-01-09 22:07:19,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 22:07:19,401 INFO L225 Difference]: With dead ends: 114 [2025-01-09 22:07:19,401 INFO L226 Difference]: Without dead ends: 111 [2025-01-09 22:07:19,401 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 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 22:07:19,403 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 16 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-09 22:07:19,403 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 66 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-09 22:07:19,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2025-01-09 22:07:19,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 96. [2025-01-09 22:07:19,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 83 states have (on average 1.2409638554216869) internal successors, (103), 86 states have internal predecessors, (103), 8 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2025-01-09 22:07:19,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 119 transitions. [2025-01-09 22:07:19,417 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 119 transitions. Word has length 14 [2025-01-09 22:07:19,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 22:07:19,417 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 119 transitions. [2025-01-09 22:07:19,417 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 22:07:19,417 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 119 transitions. [2025-01-09 22:07:19,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2025-01-09 22:07:19,418 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 22:07:19,418 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1] [2025-01-09 22:07:19,418 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-01-09 22:07:19,418 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2025-01-09 22:07:19,420 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 22:07:19,420 INFO L85 PathProgramCache]: Analyzing trace with hash 186561030, now seen corresponding path program 2 times [2025-01-09 22:07:19,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 22:07:19,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322155847] [2025-01-09 22:07:19,420 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 22:07:19,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 22:07:19,429 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-01-09 22:07:19,438 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-01-09 22:07:19,438 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 22:07:19,438 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:07:19,616 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 22:07:19,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 22:07:19,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322155847] [2025-01-09 22:07:19,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322155847] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 22:07:19,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911505891] [2025-01-09 22:07:19,617 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 22:07:19,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:07:19,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 22:07:19,619 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 22:07:19,621 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 22:07:19,661 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-01-09 22:07:19,675 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-01-09 22:07:19,675 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 22:07:19,675 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:07:19,676 INFO L256 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-01-09 22:07:19,677 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 22:07:19,687 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-01-09 22:07:19,860 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 22:07:19,860 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 22:07:20,050 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 22:07:20,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911505891] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 22:07:20,051 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 22:07:20,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2025-01-09 22:07:20,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534884605] [2025-01-09 22:07:20,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 22:07:20,052 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-01-09 22:07:20,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 22:07:20,053 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-01-09 22:07:20,053 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2025-01-09 22:07:20,053 INFO L87 Difference]: Start difference. First operand 96 states and 119 transitions. Second operand has 17 states, 16 states have (on average 2.875) internal successors, (46), 17 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 22:07:20,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 22:07:20,750 INFO L93 Difference]: Finished difference Result 281 states and 360 transitions. [2025-01-09 22:07:20,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-01-09 22:07:20,751 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.875) internal successors, (46), 17 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) Word has length 16 [2025-01-09 22:07:20,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 22:07:20,752 INFO L225 Difference]: With dead ends: 281 [2025-01-09 22:07:20,752 INFO L226 Difference]: Without dead ends: 281 [2025-01-09 22:07:20,753 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=154, Invalid=266, Unknown=0, NotChecked=0, Total=420 [2025-01-09 22:07:20,753 INFO L435 NwaCegarLoop]: 72 mSDtfsCounter, 449 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 716 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 461 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-01-09 22:07:20,754 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [461 Valid, 417 Invalid, 863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 716 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2025-01-09 22:07:20,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2025-01-09 22:07:20,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 210. [2025-01-09 22:07:20,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 185 states have (on average 1.2378378378378379) internal successors, (229), 188 states have internal predecessors, (229), 20 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2025-01-09 22:07:20,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 269 transitions. [2025-01-09 22:07:20,775 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 269 transitions. Word has length 16 [2025-01-09 22:07:20,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 22:07:20,776 INFO L471 AbstractCegarLoop]: Abstraction has 210 states and 269 transitions. [2025-01-09 22:07:20,776 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.875) internal successors, (46), 17 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 22:07:20,776 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 269 transitions. [2025-01-09 22:07:20,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2025-01-09 22:07:20,776 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 22:07:20,776 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 22:07:20,785 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 22:07:20,977 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:07:20,978 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2025-01-09 22:07:20,978 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 22:07:20,978 INFO L85 PathProgramCache]: Analyzing trace with hash 109779618, now seen corresponding path program 1 times [2025-01-09 22:07:20,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 22:07:20,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890818541] [2025-01-09 22:07:20,978 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:07:20,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 22:07:20,984 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-01-09 22:07:20,991 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-01-09 22:07:20,992 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:07:20,992 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:07:21,196 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-09 22:07:21,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 22:07:21,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890818541] [2025-01-09 22:07:21,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890818541] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 22:07:21,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 22:07:21,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-01-09 22:07:21,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693107531] [2025-01-09 22:07:21,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 22:07:21,197 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-01-09 22:07:21,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 22:07:21,198 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-01-09 22:07:21,198 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2025-01-09 22:07:21,198 INFO L87 Difference]: Start difference. First operand 210 states and 269 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 22:07:21,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 22:07:21,292 INFO L93 Difference]: Finished difference Result 224 states and 282 transitions. [2025-01-09 22:07:21,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-01-09 22:07:21,293 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2025-01-09 22:07:21,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 22:07:21,294 INFO L225 Difference]: With dead ends: 224 [2025-01-09 22:07:21,294 INFO L226 Difference]: Without dead ends: 224 [2025-01-09 22:07:21,294 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2025-01-09 22:07:21,295 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 6 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-09 22:07:21,295 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 170 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-09 22:07:21,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2025-01-09 22:07:21,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 214. [2025-01-09 22:07:21,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 188 states have (on average 1.2340425531914894) internal successors, (232), 191 states have internal predecessors, (232), 20 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2025-01-09 22:07:21,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 272 transitions. [2025-01-09 22:07:21,315 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 272 transitions. Word has length 17 [2025-01-09 22:07:21,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 22:07:21,315 INFO L471 AbstractCegarLoop]: Abstraction has 214 states and 272 transitions. [2025-01-09 22:07:21,315 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 22:07:21,315 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 272 transitions. [2025-01-09 22:07:21,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2025-01-09 22:07:21,316 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 22:07:21,316 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 22:07:21,316 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-01-09 22:07:21,316 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2025-01-09 22:07:21,317 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 22:07:21,317 INFO L85 PathProgramCache]: Analyzing trace with hash 1694954979, now seen corresponding path program 1 times [2025-01-09 22:07:21,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 22:07:21,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761527123] [2025-01-09 22:07:21,317 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:07:21,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 22:07:21,323 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-01-09 22:07:21,338 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-01-09 22:07:21,339 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:07:21,339 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:07:21,581 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-09 22:07:21,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 22:07:21,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761527123] [2025-01-09 22:07:21,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761527123] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 22:07:21,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 22:07:21,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-01-09 22:07:21,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625580404] [2025-01-09 22:07:21,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 22:07:21,583 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-01-09 22:07:21,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 22:07:21,583 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-01-09 22:07:21,584 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2025-01-09 22:07:21,584 INFO L87 Difference]: Start difference. First operand 214 states and 272 transitions. Second operand has 8 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 22:07:21,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 22:07:21,678 INFO L93 Difference]: Finished difference Result 220 states and 278 transitions. [2025-01-09 22:07:21,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-01-09 22:07:21,679 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2025-01-09 22:07:21,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 22:07:21,680 INFO L225 Difference]: With dead ends: 220 [2025-01-09 22:07:21,680 INFO L226 Difference]: Without dead ends: 220 [2025-01-09 22:07:21,680 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2025-01-09 22:07:21,681 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 6 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-09 22:07:21,681 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 159 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-09 22:07:21,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2025-01-09 22:07:21,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 210. [2025-01-09 22:07:21,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 185 states have (on average 1.2324324324324325) internal successors, (228), 187 states have internal predecessors, (228), 20 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2025-01-09 22:07:21,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 268 transitions. [2025-01-09 22:07:21,698 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 268 transitions. Word has length 22 [2025-01-09 22:07:21,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 22:07:21,698 INFO L471 AbstractCegarLoop]: Abstraction has 210 states and 268 transitions. [2025-01-09 22:07:21,698 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 22:07:21,699 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 268 transitions. [2025-01-09 22:07:21,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2025-01-09 22:07:21,702 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 22:07:21,702 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 2, 2, 2, 1, 1, 1, 1] [2025-01-09 22:07:21,702 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2025-01-09 22:07:21,702 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2025-01-09 22:07:21,703 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 22:07:21,703 INFO L85 PathProgramCache]: Analyzing trace with hash 163108111, now seen corresponding path program 1 times [2025-01-09 22:07:21,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 22:07:21,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831879558] [2025-01-09 22:07:21,703 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:07:21,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 22:07:21,712 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-01-09 22:07:21,721 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-01-09 22:07:21,723 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:07:21,723 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:07:21,872 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2025-01-09 22:07:21,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 22:07:21,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831879558] [2025-01-09 22:07:21,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831879558] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 22:07:21,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733216004] [2025-01-09 22:07:21,873 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:07:21,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:07:21,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 22:07:21,875 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 22:07:21,877 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 22:07:21,911 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-01-09 22:07:21,926 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-01-09 22:07:21,927 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:07:21,927 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:07:21,927 INFO L256 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-01-09 22:07:21,929 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 22:07:22,126 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 26 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 22:07:22,126 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 22:07:22,242 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 24 treesize of output 20 [2025-01-09 22:07:22,381 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 26 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 22:07:22,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733216004] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 22:07:22,381 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 22:07:22,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 10, 10] total 23 [2025-01-09 22:07:22,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371428927] [2025-01-09 22:07:22,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 22:07:22,382 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-01-09 22:07:22,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 22:07:22,382 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-01-09 22:07:22,383 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2025-01-09 22:07:22,383 INFO L87 Difference]: Start difference. First operand 210 states and 268 transitions. Second operand has 24 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 24 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 22:07:22,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 22:07:22,860 INFO L93 Difference]: Finished difference Result 293 states and 376 transitions. [2025-01-09 22:07:22,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-01-09 22:07:22,861 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 24 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) Word has length 28 [2025-01-09 22:07:22,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 22:07:22,862 INFO L225 Difference]: With dead ends: 293 [2025-01-09 22:07:22,862 INFO L226 Difference]: Without dead ends: 293 [2025-01-09 22:07:22,863 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=230, Invalid=526, Unknown=0, NotChecked=0, Total=756 [2025-01-09 22:07:22,863 INFO L435 NwaCegarLoop]: 67 mSDtfsCounter, 536 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 542 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-01-09 22:07:22,864 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [542 Valid, 301 Invalid, 629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-01-09 22:07:22,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2025-01-09 22:07:22,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 210. [2025-01-09 22:07:22,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 185 states have (on average 1.2324324324324325) internal successors, (228), 187 states have internal predecessors, (228), 20 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2025-01-09 22:07:22,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 268 transitions. [2025-01-09 22:07:22,877 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 268 transitions. Word has length 28 [2025-01-09 22:07:22,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 22:07:22,877 INFO L471 AbstractCegarLoop]: Abstraction has 210 states and 268 transitions. [2025-01-09 22:07:22,877 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 24 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 22:07:22,877 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 268 transitions. [2025-01-09 22:07:22,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2025-01-09 22:07:22,879 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 22:07:22,879 INFO L218 NwaCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1] [2025-01-09 22:07:22,885 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-01-09 22:07:23,079 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,SelfDestructingSolverStorable9 [2025-01-09 22:07:23,080 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2025-01-09 22:07:23,080 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 22:07:23,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1271203482, now seen corresponding path program 3 times [2025-01-09 22:07:23,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 22:07:23,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366181753] [2025-01-09 22:07:23,080 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 22:07:23,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 22:07:23,096 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 34 statements into 11 equivalence classes. [2025-01-09 22:07:23,145 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) and asserted 34 of 34 statements. [2025-01-09 22:07:23,145 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2025-01-09 22:07:23,145 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:07:23,509 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 22:07:23,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 22:07:23,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366181753] [2025-01-09 22:07:23,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366181753] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 22:07:23,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087705141] [2025-01-09 22:07:23,509 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 22:07:23,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:07:23,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 22:07:23,512 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 22:07:23,514 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 22:07:23,553 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 34 statements into 11 equivalence classes. [2025-01-09 22:07:23,610 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) and asserted 34 of 34 statements. [2025-01-09 22:07:23,610 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2025-01-09 22:07:23,610 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:07:23,612 INFO L256 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-01-09 22:07:23,614 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 22:07:23,621 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-01-09 22:07:23,940 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 22:07:23,941 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 22:07:24,331 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 22:07:24,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087705141] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 22:07:24,332 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 22:07:24,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 34 [2025-01-09 22:07:24,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506823901] [2025-01-09 22:07:24,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 22:07:24,332 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2025-01-09 22:07:24,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 22:07:24,333 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2025-01-09 22:07:24,334 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=879, Unknown=0, NotChecked=0, Total=1190 [2025-01-09 22:07:24,334 INFO L87 Difference]: Start difference. First operand 210 states and 268 transitions. Second operand has 35 states, 34 states have (on average 2.8529411764705883) internal successors, (97), 35 states have internal predecessors, (97), 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 22:07:26,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 22:07:26,759 INFO L93 Difference]: Finished difference Result 1422 states and 1846 transitions. [2025-01-09 22:07:26,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2025-01-09 22:07:26,760 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.8529411764705883) internal successors, (97), 35 states have internal predecessors, (97), 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 34 [2025-01-09 22:07:26,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 22:07:26,766 INFO L225 Difference]: With dead ends: 1422 [2025-01-09 22:07:26,766 INFO L226 Difference]: Without dead ends: 1422 [2025-01-09 22:07:26,769 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=856, Invalid=2114, Unknown=0, NotChecked=0, Total=2970 [2025-01-09 22:07:26,771 INFO L435 NwaCegarLoop]: 142 mSDtfsCounter, 1667 mSDsluCounter, 1058 mSDsCounter, 0 mSdLazyCounter, 2300 mSolverCounterSat, 584 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1693 SdHoareTripleChecker+Valid, 1200 SdHoareTripleChecker+Invalid, 2884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 584 IncrementalHoareTripleChecker+Valid, 2300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2025-01-09 22:07:26,771 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1693 Valid, 1200 Invalid, 2884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [584 Valid, 2300 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2025-01-09 22:07:26,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1422 states. [2025-01-09 22:07:26,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1422 to 491. [2025-01-09 22:07:26,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 436 states have (on average 1.2362385321100917) internal successors, (539), 438 states have internal predecessors, (539), 50 states have call successors, (50), 2 states have call predecessors, (50), 2 states have return successors, (50), 50 states have call predecessors, (50), 50 states have call successors, (50) [2025-01-09 22:07:26,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 639 transitions. [2025-01-09 22:07:26,818 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 639 transitions. Word has length 34 [2025-01-09 22:07:26,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 22:07:26,818 INFO L471 AbstractCegarLoop]: Abstraction has 491 states and 639 transitions. [2025-01-09 22:07:26,818 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.8529411764705883) internal successors, (97), 35 states have internal predecessors, (97), 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 22:07:26,818 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 639 transitions. [2025-01-09 22:07:26,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2025-01-09 22:07:26,843 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 22:07:26,843 INFO L218 NwaCegarLoop]: trace histogram [11, 11, 11, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 22:07:26,851 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 22:07:27,044 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2025-01-09 22:07:27,045 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2025-01-09 22:07:27,045 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 22:07:27,045 INFO L85 PathProgramCache]: Analyzing trace with hash -151018833, now seen corresponding path program 1 times [2025-01-09 22:07:27,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 22:07:27,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526727987] [2025-01-09 22:07:27,046 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:07:27,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 22:07:27,056 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 67 statements into 1 equivalence classes. [2025-01-09 22:07:27,065 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 67 of 67 statements. [2025-01-09 22:07:27,065 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:07:27,066 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:07:27,560 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 168 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 22:07:27,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 22:07:27,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526727987] [2025-01-09 22:07:27,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526727987] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 22:07:27,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507025580] [2025-01-09 22:07:27,560 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:07:27,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:07:27,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 22:07:27,562 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 22:07:27,563 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 22:07:27,607 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 67 statements into 1 equivalence classes. [2025-01-09 22:07:27,636 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 67 of 67 statements. [2025-01-09 22:07:27,636 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:07:27,636 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:07:27,637 INFO L256 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-01-09 22:07:27,639 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 22:07:27,745 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 145 proven. 32 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2025-01-09 22:07:27,745 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 22:07:27,984 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 145 proven. 32 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2025-01-09 22:07:27,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507025580] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 22:07:27,984 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 22:07:27,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 16, 16] total 38 [2025-01-09 22:07:27,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483162785] [2025-01-09 22:07:27,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 22:07:27,987 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2025-01-09 22:07:27,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 22:07:27,988 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2025-01-09 22:07:27,989 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=1076, Unknown=0, NotChecked=0, Total=1406 [2025-01-09 22:07:27,989 INFO L87 Difference]: Start difference. First operand 491 states and 639 transitions. Second operand has 38 states, 38 states have (on average 3.1052631578947367) internal successors, (118), 38 states have internal predecessors, (118), 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 22:07:29,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 22:07:29,445 INFO L93 Difference]: Finished difference Result 1271 states and 1643 transitions. [2025-01-09 22:07:29,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2025-01-09 22:07:29,446 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.1052631578947367) internal successors, (118), 38 states have internal predecessors, (118), 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 67 [2025-01-09 22:07:29,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 22:07:29,452 INFO L225 Difference]: With dead ends: 1271 [2025-01-09 22:07:29,452 INFO L226 Difference]: Without dead ends: 1271 [2025-01-09 22:07:29,453 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 117 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1419 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1387, Invalid=4163, Unknown=0, NotChecked=0, Total=5550 [2025-01-09 22:07:29,454 INFO L435 NwaCegarLoop]: 151 mSDtfsCounter, 476 mSDsluCounter, 1453 mSDsCounter, 0 mSdLazyCounter, 2258 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 478 SdHoareTripleChecker+Valid, 1604 SdHoareTripleChecker+Invalid, 2423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 2258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2025-01-09 22:07:29,454 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [478 Valid, 1604 Invalid, 2423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 2258 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2025-01-09 22:07:29,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1271 states. [2025-01-09 22:07:29,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1271 to 620. [2025-01-09 22:07:29,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 620 states, 549 states have (on average 1.2112932604735884) internal successors, (665), 551 states have internal predecessors, (665), 66 states have call successors, (66), 2 states have call predecessors, (66), 2 states have return successors, (66), 66 states have call predecessors, (66), 66 states have call successors, (66) [2025-01-09 22:07:29,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 797 transitions. [2025-01-09 22:07:29,494 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 797 transitions. Word has length 67 [2025-01-09 22:07:29,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 22:07:29,494 INFO L471 AbstractCegarLoop]: Abstraction has 620 states and 797 transitions. [2025-01-09 22:07:29,495 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.1052631578947367) internal successors, (118), 38 states have internal predecessors, (118), 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 22:07:29,495 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 797 transitions. [2025-01-09 22:07:29,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2025-01-09 22:07:29,497 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 22:07:29,497 INFO L218 NwaCegarLoop]: trace histogram [23, 22, 22, 1, 1, 1] [2025-01-09 22:07:29,506 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 22:07:29,698 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 22:07:29,698 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2025-01-09 22:07:29,698 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 22:07:29,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1695301670, now seen corresponding path program 4 times [2025-01-09 22:07:29,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 22:07:29,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548280700] [2025-01-09 22:07:29,699 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-09 22:07:29,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 22:07:29,717 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 70 statements into 2 equivalence classes. [2025-01-09 22:07:29,743 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 70 of 70 statements. [2025-01-09 22:07:29,743 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-01-09 22:07:29,743 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:07:30,582 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 22:07:30,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 22:07:30,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548280700] [2025-01-09 22:07:30,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548280700] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 22:07:30,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230894535] [2025-01-09 22:07:30,583 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-09 22:07:30,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:07:30,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 22:07:30,585 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 22:07:30,587 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 22:07:30,639 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 70 statements into 2 equivalence classes. [2025-01-09 22:07:30,827 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 70 of 70 statements. [2025-01-09 22:07:30,827 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-01-09 22:07:30,828 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:07:30,830 INFO L256 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 51 conjuncts are in the unsatisfiable core [2025-01-09 22:07:30,833 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 22:07:30,844 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-01-09 22:07:31,901 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 22:07:31,902 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 22:07:33,025 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 22:07:33,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230894535] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 22:07:33,026 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 22:07:33,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 71 [2025-01-09 22:07:33,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867652451] [2025-01-09 22:07:33,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 22:07:33,027 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2025-01-09 22:07:33,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 22:07:33,028 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2025-01-09 22:07:33,029 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1224, Invalid=3888, Unknown=0, NotChecked=0, Total=5112 [2025-01-09 22:07:33,029 INFO L87 Difference]: Start difference. First operand 620 states and 797 transitions. Second operand has 72 states, 71 states have (on average 2.9295774647887325) internal successors, (208), 72 states have internal predecessors, (208), 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 22:07:40,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 22:07:40,076 INFO L93 Difference]: Finished difference Result 1986 states and 2571 transitions. [2025-01-09 22:07:40,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2025-01-09 22:07:40,076 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 71 states have (on average 2.9295774647887325) internal successors, (208), 72 states have internal predecessors, (208), 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 70 [2025-01-09 22:07:40,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 22:07:40,084 INFO L225 Difference]: With dead ends: 1986 [2025-01-09 22:07:40,084 INFO L226 Difference]: Without dead ends: 1986 [2025-01-09 22:07:40,086 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2643 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2786, Invalid=5956, Unknown=0, NotChecked=0, Total=8742 [2025-01-09 22:07:40,086 INFO L435 NwaCegarLoop]: 284 mSDtfsCounter, 6015 mSDsluCounter, 6585 mSDsCounter, 0 mSdLazyCounter, 13629 mSolverCounterSat, 1866 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6063 SdHoareTripleChecker+Valid, 6869 SdHoareTripleChecker+Invalid, 15495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1866 IncrementalHoareTripleChecker+Valid, 13629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2025-01-09 22:07:40,087 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6063 Valid, 6869 Invalid, 15495 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1866 Valid, 13629 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2025-01-09 22:07:40,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1986 states. [2025-01-09 22:07:40,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1986 to 952. [2025-01-09 22:07:40,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 952 states, 848 states have (on average 1.2287735849056605) internal successors, (1042), 850 states have internal predecessors, (1042), 99 states have call successors, (99), 2 states have call predecessors, (99), 2 states have return successors, (99), 99 states have call predecessors, (99), 99 states have call successors, (99) [2025-01-09 22:07:40,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 952 states to 952 states and 1240 transitions. [2025-01-09 22:07:40,120 INFO L78 Accepts]: Start accepts. Automaton has 952 states and 1240 transitions. Word has length 70 [2025-01-09 22:07:40,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 22:07:40,120 INFO L471 AbstractCegarLoop]: Abstraction has 952 states and 1240 transitions. [2025-01-09 22:07:40,120 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 71 states have (on average 2.9295774647887325) internal successors, (208), 72 states have internal predecessors, (208), 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 22:07:40,120 INFO L276 IsEmpty]: Start isEmpty. Operand 952 states and 1240 transitions. [2025-01-09 22:07:40,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2025-01-09 22:07:40,123 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 22:07:40,123 INFO L218 NwaCegarLoop]: trace histogram [23, 23, 23, 7, 6, 6, 6, 1, 1, 1, 1] [2025-01-09 22:07:40,133 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-01-09 22:07:40,323 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 22:07:40,324 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2025-01-09 22:07:40,324 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 22:07:40,324 INFO L85 PathProgramCache]: Analyzing trace with hash -2129062469, now seen corresponding path program 2 times [2025-01-09 22:07:40,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 22:07:40,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787903140] [2025-01-09 22:07:40,324 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 22:07:40,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 22:07:40,340 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 98 statements into 2 equivalence classes. [2025-01-09 22:07:40,359 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 98 of 98 statements. [2025-01-09 22:07:40,359 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 22:07:40,359 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:07:40,723 INFO L134 CoverageAnalysis]: Checked inductivity of 854 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 782 trivial. 0 not checked. [2025-01-09 22:07:40,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 22:07:40,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787903140] [2025-01-09 22:07:40,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787903140] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 22:07:40,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422278212] [2025-01-09 22:07:40,724 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 22:07:40,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:07:40,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 22:07:40,726 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 22:07:40,728 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 22:07:40,783 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 98 statements into 2 equivalence classes. [2025-01-09 22:07:40,832 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 98 of 98 statements. [2025-01-09 22:07:40,833 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 22:07:40,833 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:07:40,838 INFO L256 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-01-09 22:07:40,841 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 22:07:41,334 INFO L134 CoverageAnalysis]: Checked inductivity of 854 backedges. 57 proven. 405 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2025-01-09 22:07:41,335 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 22:07:41,792 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 24 treesize of output 20 [2025-01-09 22:07:41,980 INFO L134 CoverageAnalysis]: Checked inductivity of 854 backedges. 57 proven. 405 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2025-01-09 22:07:41,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422278212] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 22:07:41,980 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 22:07:41,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 16, 16] total 39 [2025-01-09 22:07:41,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149990065] [2025-01-09 22:07:41,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 22:07:41,981 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2025-01-09 22:07:41,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 22:07:41,983 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2025-01-09 22:07:41,983 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=381, Invalid=1179, Unknown=0, NotChecked=0, Total=1560 [2025-01-09 22:07:41,984 INFO L87 Difference]: Start difference. First operand 952 states and 1240 transitions. Second operand has 40 states, 39 states have (on average 3.4358974358974357) internal successors, (134), 40 states have internal predecessors, (134), 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 22:07:42,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 22:07:42,723 INFO L93 Difference]: Finished difference Result 1139 states and 1483 transitions. [2025-01-09 22:07:42,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-01-09 22:07:42,724 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 3.4358974358974357) internal successors, (134), 40 states have internal predecessors, (134), 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 22:07:42,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 22:07:42,729 INFO L225 Difference]: With dead ends: 1139 [2025-01-09 22:07:42,729 INFO L226 Difference]: Without dead ends: 1139 [2025-01-09 22:07:42,730 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 747 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=597, Invalid=1659, Unknown=0, NotChecked=0, Total=2256 [2025-01-09 22:07:42,731 INFO L435 NwaCegarLoop]: 97 mSDtfsCounter, 1582 mSDsluCounter, 595 mSDsCounter, 0 mSdLazyCounter, 1108 mSolverCounterSat, 343 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1596 SdHoareTripleChecker+Valid, 692 SdHoareTripleChecker+Invalid, 1451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 343 IncrementalHoareTripleChecker+Valid, 1108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-01-09 22:07:42,731 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1596 Valid, 692 Invalid, 1451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [343 Valid, 1108 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2025-01-09 22:07:42,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1139 states. [2025-01-09 22:07:42,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1139 to 952. [2025-01-09 22:07:42,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 952 states, 848 states have (on average 1.2287735849056605) internal successors, (1042), 850 states have internal predecessors, (1042), 99 states have call successors, (99), 2 states have call predecessors, (99), 2 states have return successors, (99), 99 states have call predecessors, (99), 99 states have call successors, (99) [2025-01-09 22:07:42,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 952 states to 952 states and 1240 transitions. [2025-01-09 22:07:42,755 INFO L78 Accepts]: Start accepts. Automaton has 952 states and 1240 transitions. Word has length 98 [2025-01-09 22:07:42,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 22:07:42,756 INFO L471 AbstractCegarLoop]: Abstraction has 952 states and 1240 transitions. [2025-01-09 22:07:42,756 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 3.4358974358974357) internal successors, (134), 40 states have internal predecessors, (134), 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 22:07:42,756 INFO L276 IsEmpty]: Start isEmpty. Operand 952 states and 1240 transitions. [2025-01-09 22:07:42,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2025-01-09 22:07:42,759 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 22:07:42,759 INFO L218 NwaCegarLoop]: trace histogram [23, 23, 23, 15, 14, 14, 14, 1, 1, 1, 1] [2025-01-09 22:07:42,767 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 22:07:42,959 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 22:07:42,960 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2025-01-09 22:07:42,960 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 22:07:42,961 INFO L85 PathProgramCache]: Analyzing trace with hash 198906579, now seen corresponding path program 3 times [2025-01-09 22:07:42,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 22:07:42,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780119867] [2025-01-09 22:07:42,961 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 22:07:42,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 22:07:42,991 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 130 statements into 24 equivalence classes. [2025-01-09 22:07:42,997 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 12 of 130 statements. [2025-01-09 22:07:42,998 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-01-09 22:07:42,998 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:07:43,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1174 backedges. 85 proven. 14 refuted. 0 times theorem prover too weak. 1075 trivial. 0 not checked. [2025-01-09 22:07:43,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 22:07:43,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780119867] [2025-01-09 22:07:43,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780119867] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 22:07:43,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640305340] [2025-01-09 22:07:43,072 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 22:07:43,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:07:43,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 22:07:43,074 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 22:07:43,076 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 22:07:43,146 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 130 statements into 24 equivalence classes. [2025-01-09 22:07:43,154 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 12 of 130 statements. [2025-01-09 22:07:43,154 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-01-09 22:07:43,154 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:07:43,155 INFO L256 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-01-09 22:07:43,157 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 22:07:43,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1174 backedges. 85 proven. 14 refuted. 0 times theorem prover too weak. 1075 trivial. 0 not checked. [2025-01-09 22:07:43,261 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 22:07:43,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1174 backedges. 45 proven. 54 refuted. 0 times theorem prover too weak. 1075 trivial. 0 not checked. [2025-01-09 22:07:43,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640305340] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 22:07:43,573 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 22:07:43,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2025-01-09 22:07:43,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315110822] [2025-01-09 22:07:43,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 22:07:43,574 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-01-09 22:07:43,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 22:07:43,575 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-01-09 22:07:43,575 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2025-01-09 22:07:43,575 INFO L87 Difference]: Start difference. First operand 952 states and 1240 transitions. Second operand has 14 states, 13 states have (on average 2.230769230769231) internal successors, (29), 14 states have internal predecessors, (29), 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 22:07:43,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 22:07:43,718 INFO L93 Difference]: Finished difference Result 958 states and 1248 transitions. [2025-01-09 22:07:43,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-01-09 22:07:43,719 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.230769230769231) internal successors, (29), 14 states have internal predecessors, (29), 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 130 [2025-01-09 22:07:43,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 22:07:43,720 INFO L225 Difference]: With dead ends: 958 [2025-01-09 22:07:43,721 INFO L226 Difference]: Without dead ends: 143 [2025-01-09 22:07:43,721 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2025-01-09 22:07:43,721 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 109 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-09 22:07:43,723 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 63 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-09 22:07:43,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2025-01-09 22:07:43,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2025-01-09 22:07:43,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.0070422535211268) internal successors, (143), 142 states have internal predecessors, (143), 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 22:07:43,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2025-01-09 22:07:43,726 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 130 [2025-01-09 22:07:43,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 22:07:43,726 INFO L471 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2025-01-09 22:07:43,726 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.230769230769231) internal successors, (29), 14 states have internal predecessors, (29), 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 22:07:43,726 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2025-01-09 22:07:43,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2025-01-09 22:07:43,727 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 22:07:43,727 INFO L218 NwaCegarLoop]: trace histogram [47, 46, 46, 1, 1, 1] [2025-01-09 22:07:43,735 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-01-09 22:07:43,927 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:07:43,928 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2025-01-09 22:07:43,928 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 22:07:43,928 INFO L85 PathProgramCache]: Analyzing trace with hash 888778150, now seen corresponding path program 5 times [2025-01-09 22:07:43,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 22:07:43,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555896952] [2025-01-09 22:07:43,928 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-09 22:07:43,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 22:07:43,946 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 142 statements into 47 equivalence classes. [2025-01-09 22:07:44,237 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) and asserted 142 of 142 statements. [2025-01-09 22:07:44,237 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2025-01-09 22:07:44,237 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:07:46,379 INFO L134 CoverageAnalysis]: Checked inductivity of 3197 backedges. 0 proven. 3197 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 22:07:46,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 22:07:46,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555896952] [2025-01-09 22:07:46,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555896952] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 22:07:46,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990467145] [2025-01-09 22:07:46,379 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-09 22:07:46,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:07:46,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 22:07:46,381 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 22:07:46,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-01-09 22:07:46,458 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 142 statements into 47 equivalence classes. [2025-01-09 22:08:43,691 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) and asserted 142 of 142 statements. [2025-01-09 22:08:43,691 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2025-01-09 22:08:43,691 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:08:43,714 INFO L256 TraceCheckSpWp]: Trace formula consists of 636 conjuncts, 99 conjuncts are in the unsatisfiable core [2025-01-09 22:08:43,717 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 22:08:43,722 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-01-09 22:08:47,003 INFO L134 CoverageAnalysis]: Checked inductivity of 3197 backedges. 0 proven. 3197 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 22:08:47,004 INFO L312 TraceCheckSpWp]: Computing backward predicates...