./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety/960521-1-1.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/memsafety/960521-1-1.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 4591ef5e575ce80e216cc4837705a7c6f141a943d9af6ca1eb606ab877abd06b --- Real Ultimate output --- This is Ultimate 0.3.0-?-551b009-m [2025-01-09 22:17:25,344 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-01-09 22:17:25,399 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-01-09 22:17:25,406 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-01-09 22:17:25,406 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-01-09 22:17:25,419 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-01-09 22:17:25,420 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-01-09 22:17:25,420 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-01-09 22:17:25,420 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-01-09 22:17:25,420 INFO L153 SettingsManager]: * Use memory slicer=true [2025-01-09 22:17:25,420 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-01-09 22:17:25,420 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-01-09 22:17:25,420 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-01-09 22:17:25,420 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-01-09 22:17:25,420 INFO L153 SettingsManager]: * Use SBE=true [2025-01-09 22:17:25,420 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-01-09 22:17:25,420 INFO L153 SettingsManager]: * sizeof long=4 [2025-01-09 22:17:25,420 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-01-09 22:17:25,420 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-01-09 22:17:25,420 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-01-09 22:17:25,423 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-01-09 22:17:25,423 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-01-09 22:17:25,423 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-01-09 22:17:25,424 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-01-09 22:17:25,424 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-01-09 22:17:25,424 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-01-09 22:17:25,424 INFO L153 SettingsManager]: * sizeof long double=12 [2025-01-09 22:17:25,424 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-01-09 22:17:25,424 INFO L153 SettingsManager]: * Use constant arrays=true [2025-01-09 22:17:25,424 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-01-09 22:17:25,424 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-09 22:17:25,424 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-09 22:17:25,424 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-09 22:17:25,424 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 22:17:25,424 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-01-09 22:17:25,424 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-09 22:17:25,424 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-09 22:17:25,424 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-09 22:17:25,424 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 22:17:25,424 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-01-09 22:17:25,424 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-01-09 22:17:25,424 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-01-09 22:17:25,425 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-01-09 22:17:25,425 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-01-09 22:17:25,425 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-01-09 22:17:25,425 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-01-09 22:17:25,425 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-01-09 22:17:25,425 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 -> 4591ef5e575ce80e216cc4837705a7c6f141a943d9af6ca1eb606ab877abd06b [2025-01-09 22:17:25,699 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-01-09 22:17:25,704 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-01-09 22:17:25,706 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-01-09 22:17:25,707 INFO L270 PluginConnector]: Initializing CDTParser... [2025-01-09 22:17:25,707 INFO L274 PluginConnector]: CDTParser initialized [2025-01-09 22:17:25,708 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety/960521-1-1.i [2025-01-09 22:17:26,837 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/dc8aa7399/9a7052e2f2ee4224b19c6eeb571ff706/FLAG6b64022af [2025-01-09 22:17:27,072 INFO L384 CDTParser]: Found 1 translation units. [2025-01-09 22:17:27,073 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/memsafety/960521-1-1.i [2025-01-09 22:17:27,081 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/dc8aa7399/9a7052e2f2ee4224b19c6eeb571ff706/FLAG6b64022af [2025-01-09 22:17:27,095 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/dc8aa7399/9a7052e2f2ee4224b19c6eeb571ff706 [2025-01-09 22:17:27,097 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-01-09 22:17:27,098 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-01-09 22:17:27,098 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-01-09 22:17:27,099 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-01-09 22:17:27,101 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-01-09 22:17:27,102 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 10:17:27" (1/1) ... [2025-01-09 22:17:27,102 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33f67c65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:17:27, skipping insertion in model container [2025-01-09 22:17:27,103 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 10:17:27" (1/1) ... [2025-01-09 22:17:27,126 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-01-09 22:17:27,280 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-09 22:17:27,286 INFO L200 MainTranslator]: Completed pre-run [2025-01-09 22:17:27,311 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-09 22:17:27,327 INFO L204 MainTranslator]: Completed translation [2025-01-09 22:17:27,328 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:17:27 WrapperNode [2025-01-09 22:17:27,328 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-01-09 22:17:27,329 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-01-09 22:17:27,329 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-01-09 22:17:27,329 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-01-09 22:17:27,333 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:17:27" (1/1) ... [2025-01-09 22:17:27,338 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:17:27" (1/1) ... [2025-01-09 22:17:27,351 INFO L138 Inliner]: procedures = 121, calls = 17, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 58 [2025-01-09 22:17:27,351 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-01-09 22:17:27,352 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-01-09 22:17:27,352 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-01-09 22:17:27,352 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-01-09 22:17:27,358 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:17:27" (1/1) ... [2025-01-09 22:17:27,358 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:17:27" (1/1) ... [2025-01-09 22:17:27,359 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:17:27" (1/1) ... [2025-01-09 22:17:27,366 INFO L175 MemorySlicer]: Split 6 memory accesses to 3 slices as follows [2, 3, 1]. 50 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 3 writes are split as follows [0, 2, 1]. [2025-01-09 22:17:27,367 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:17:27" (1/1) ... [2025-01-09 22:17:27,367 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:17:27" (1/1) ... [2025-01-09 22:17:27,370 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:17:27" (1/1) ... [2025-01-09 22:17:27,371 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:17:27" (1/1) ... [2025-01-09 22:17:27,372 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:17:27" (1/1) ... [2025-01-09 22:17:27,373 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:17:27" (1/1) ... [2025-01-09 22:17:27,373 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:17:27" (1/1) ... [2025-01-09 22:17:27,374 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-01-09 22:17:27,375 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-01-09 22:17:27,375 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-01-09 22:17:27,375 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-01-09 22:17:27,376 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:17:27" (1/1) ... [2025-01-09 22:17:27,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 22:17:27,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 22:17:27,405 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 22:17:27,414 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 22:17:27,438 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-01-09 22:17:27,438 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-01-09 22:17:27,438 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-01-09 22:17:27,438 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-01-09 22:17:27,438 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-01-09 22:17:27,439 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2025-01-09 22:17:27,439 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-01-09 22:17:27,439 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-01-09 22:17:27,439 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-01-09 22:17:27,439 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-01-09 22:17:27,439 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-01-09 22:17:27,439 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-01-09 22:17:27,439 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-01-09 22:17:27,439 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-01-09 22:17:27,510 INFO L234 CfgBuilder]: Building ICFG [2025-01-09 22:17:27,511 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-01-09 22:17:27,608 INFO L? ?]: Removed 12 outVars from TransFormulas that were not future-live. [2025-01-09 22:17:27,608 INFO L283 CfgBuilder]: Performing block encoding [2025-01-09 22:17:27,615 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-01-09 22:17:27,615 INFO L312 CfgBuilder]: Removed 0 assume(true) statements. [2025-01-09 22:17:27,616 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 10:17:27 BoogieIcfgContainer [2025-01-09 22:17:27,616 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-01-09 22:17:27,617 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-01-09 22:17:27,617 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-01-09 22:17:27,622 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-01-09 22:17:27,622 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.01 10:17:27" (1/3) ... [2025-01-09 22:17:27,623 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39d624ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 10:17:27, skipping insertion in model container [2025-01-09 22:17:27,623 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:17:27" (2/3) ... [2025-01-09 22:17:27,623 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39d624ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 10:17:27, skipping insertion in model container [2025-01-09 22:17:27,623 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 10:17:27" (3/3) ... [2025-01-09 22:17:27,625 INFO L128 eAbstractionObserver]: Analyzing ICFG 960521-1-1.i [2025-01-09 22:17:27,635 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-01-09 22:17:27,636 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG 960521-1-1.i that has 1 procedures, 50 locations, 1 initial locations, 2 loop locations, and 21 error locations. [2025-01-09 22:17:27,667 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-01-09 22:17:27,678 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;@5b8ba271, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-01-09 22:17:27,678 INFO L334 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2025-01-09 22:17:27,682 INFO L276 IsEmpty]: Start isEmpty. Operand has 50 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 49 states have internal predecessors, (52), 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 22:17:27,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2025-01-09 22:17:27,687 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 22:17:27,687 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1] [2025-01-09 22:17:27,687 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2025-01-09 22:17:27,692 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 22:17:27,692 INFO L85 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2025-01-09 22:17:27,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 22:17:27,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775960419] [2025-01-09 22:17:27,699 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:17:27,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 22:17:27,751 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-01-09 22:17:27,765 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-01-09 22:17:27,766 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:17:27,766 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:17:27,846 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 22:17:27,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 22:17:27,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775960419] [2025-01-09 22:17:27,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775960419] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 22:17:27,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 22:17:27,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-01-09 22:17:27,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852268034] [2025-01-09 22:17:27,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 22:17:27,857 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-01-09 22:17:27,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 22:17:27,874 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-01-09 22:17:27,875 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-01-09 22:17:27,876 INFO L87 Difference]: Start difference. First operand has 50 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 49 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 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 22:17:27,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 22:17:27,928 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2025-01-09 22:17:27,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-01-09 22:17:27,929 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 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 3 [2025-01-09 22:17:27,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 22:17:27,933 INFO L225 Difference]: With dead ends: 49 [2025-01-09 22:17:27,933 INFO L226 Difference]: Without dead ends: 47 [2025-01-09 22:17:27,934 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 22:17:27,936 INFO L435 NwaCegarLoop]: 49 mSDtfsCounter, 0 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-09 22:17:27,937 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 79 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-09 22:17:27,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2025-01-09 22:17:27,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2025-01-09 22:17:27,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 46 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 22:17:27,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2025-01-09 22:17:27,964 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 3 [2025-01-09 22:17:27,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 22:17:27,965 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2025-01-09 22:17:27,965 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 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 22:17:27,965 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2025-01-09 22:17:27,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2025-01-09 22:17:27,965 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 22:17:27,965 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1] [2025-01-09 22:17:27,966 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-01-09 22:17:27,966 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2025-01-09 22:17:27,966 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 22:17:27,966 INFO L85 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2025-01-09 22:17:27,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 22:17:27,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995896210] [2025-01-09 22:17:27,967 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:17:27,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 22:17:27,973 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-01-09 22:17:27,992 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-01-09 22:17:27,993 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:17:27,993 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:17:28,069 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 22:17:28,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 22:17:28,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995896210] [2025-01-09 22:17:28,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995896210] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 22:17:28,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 22:17:28,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-01-09 22:17:28,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43368891] [2025-01-09 22:17:28,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 22:17:28,071 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-01-09 22:17:28,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 22:17:28,071 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-01-09 22:17:28,072 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-01-09 22:17:28,072 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 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 22:17:28,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 22:17:28,091 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2025-01-09 22:17:28,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-01-09 22:17:28,093 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 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 3 [2025-01-09 22:17:28,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 22:17:28,094 INFO L225 Difference]: With dead ends: 46 [2025-01-09 22:17:28,094 INFO L226 Difference]: Without dead ends: 46 [2025-01-09 22:17:28,094 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 22:17:28,095 INFO L435 NwaCegarLoop]: 47 mSDtfsCounter, 0 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-09 22:17:28,095 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 85 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-09 22:17:28,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2025-01-09 22:17:28,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2025-01-09 22:17:28,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 45 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 22:17:28,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2025-01-09 22:17:28,097 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 3 [2025-01-09 22:17:28,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 22:17:28,098 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2025-01-09 22:17:28,098 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 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 22:17:28,098 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2025-01-09 22:17:28,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2025-01-09 22:17:28,098 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 22:17:28,098 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2025-01-09 22:17:28,098 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-01-09 22:17:28,098 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2025-01-09 22:17:28,099 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 22:17:28,099 INFO L85 PathProgramCache]: Analyzing trace with hash 889446184, now seen corresponding path program 1 times [2025-01-09 22:17:28,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 22:17:28,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198318171] [2025-01-09 22:17:28,099 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:17:28,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 22:17:28,105 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-01-09 22:17:28,111 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-01-09 22:17:28,112 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:17:28,112 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:17:28,190 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 22:17:28,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 22:17:28,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198318171] [2025-01-09 22:17:28,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198318171] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 22:17:28,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 22:17:28,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-01-09 22:17:28,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636526696] [2025-01-09 22:17:28,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 22:17:28,191 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-01-09 22:17:28,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 22:17:28,191 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-01-09 22:17:28,191 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-01-09 22:17:28,191 INFO L87 Difference]: Start difference. First operand 46 states and 48 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 22:17:28,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 22:17:28,222 INFO L93 Difference]: Finished difference Result 43 states and 45 transitions. [2025-01-09 22:17:28,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-01-09 22:17:28,223 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 22:17:28,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 22:17:28,223 INFO L225 Difference]: With dead ends: 43 [2025-01-09 22:17:28,223 INFO L226 Difference]: Without dead ends: 43 [2025-01-09 22:17:28,224 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 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 22:17:28,224 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 24 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-09 22:17:28,224 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 50 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-09 22:17:28,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2025-01-09 22:17:28,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2025-01-09 22:17:28,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 42 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 22:17:28,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2025-01-09 22:17:28,231 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 6 [2025-01-09 22:17:28,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 22:17:28,231 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2025-01-09 22:17:28,231 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 22:17:28,231 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2025-01-09 22:17:28,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2025-01-09 22:17:28,231 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 22:17:28,232 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2025-01-09 22:17:28,232 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-01-09 22:17:28,232 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2025-01-09 22:17:28,232 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 22:17:28,232 INFO L85 PathProgramCache]: Analyzing trace with hash 889446185, now seen corresponding path program 1 times [2025-01-09 22:17:28,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 22:17:28,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078656745] [2025-01-09 22:17:28,232 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:17:28,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 22:17:28,237 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-01-09 22:17:28,242 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-01-09 22:17:28,242 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:17:28,242 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:17:28,462 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 22:17:28,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 22:17:28,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078656745] [2025-01-09 22:17:28,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078656745] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 22:17:28,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 22:17:28,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-01-09 22:17:28,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116214797] [2025-01-09 22:17:28,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 22:17:28,464 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-01-09 22:17:28,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 22:17:28,465 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-01-09 22:17:28,465 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-01-09 22:17:28,465 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 6 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 22:17:28,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 22:17:28,572 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2025-01-09 22:17:28,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-01-09 22:17:28,572 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 6 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 22:17:28,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 22:17:28,573 INFO L225 Difference]: With dead ends: 48 [2025-01-09 22:17:28,573 INFO L226 Difference]: Without dead ends: 48 [2025-01-09 22:17:28,573 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2025-01-09 22:17:28,574 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 53 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-09 22:17:28,574 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 79 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-09 22:17:28,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2025-01-09 22:17:28,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2025-01-09 22:17:28,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 43 states have internal predecessors, (47), 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 22:17:28,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2025-01-09 22:17:28,580 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 6 [2025-01-09 22:17:28,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 22:17:28,580 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2025-01-09 22:17:28,580 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 6 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 22:17:28,580 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2025-01-09 22:17:28,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2025-01-09 22:17:28,580 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 22:17:28,580 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-01-09 22:17:28,580 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-01-09 22:17:28,580 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2025-01-09 22:17:28,581 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 22:17:28,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1803033964, now seen corresponding path program 1 times [2025-01-09 22:17:28,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 22:17:28,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384704501] [2025-01-09 22:17:28,582 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:17:28,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 22:17:28,588 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-01-09 22:17:28,591 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-01-09 22:17:28,591 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:17:28,591 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:17:28,627 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 22:17:28,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 22:17:28,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384704501] [2025-01-09 22:17:28,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384704501] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 22:17:28,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 22:17:28,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-01-09 22:17:28,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894331538] [2025-01-09 22:17:28,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 22:17:28,628 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-01-09 22:17:28,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 22:17:28,629 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-01-09 22:17:28,629 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-01-09 22:17:28,629 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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 22:17:28,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 22:17:28,655 INFO L93 Difference]: Finished difference Result 48 states and 51 transitions. [2025-01-09 22:17:28,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-01-09 22:17:28,656 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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 22:17:28,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 22:17:28,656 INFO L225 Difference]: With dead ends: 48 [2025-01-09 22:17:28,657 INFO L226 Difference]: Without dead ends: 48 [2025-01-09 22:17:28,657 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-01-09 22:17:28,658 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 46 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-09 22:17:28,658 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 64 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-09 22:17:28,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2025-01-09 22:17:28,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2025-01-09 22:17:28,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 43 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 22:17:28,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2025-01-09 22:17:28,660 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 7 [2025-01-09 22:17:28,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 22:17:28,660 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2025-01-09 22:17:28,660 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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 22:17:28,660 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2025-01-09 22:17:28,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2025-01-09 22:17:28,660 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 22:17:28,660 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 22:17:28,660 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-01-09 22:17:28,660 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2025-01-09 22:17:28,662 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 22:17:28,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1838002506, now seen corresponding path program 1 times [2025-01-09 22:17:28,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 22:17:28,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131955789] [2025-01-09 22:17:28,663 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:17:28,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 22:17:28,670 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-01-09 22:17:28,676 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-01-09 22:17:28,678 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:17:28,678 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:17:28,891 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 22:17:28,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 22:17:28,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131955789] [2025-01-09 22:17:28,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131955789] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 22:17:28,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706287711] [2025-01-09 22:17:28,891 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:17:28,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:17:28,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 22:17:28,899 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 22:17:28,907 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 22:17:28,936 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-01-09 22:17:28,944 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-01-09 22:17:28,944 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:17:28,944 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:17:28,946 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-01-09 22:17:28,948 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 22:17:28,980 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 22:17:28,985 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2025-01-09 22:17:28,991 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 10 treesize of output 8 [2025-01-09 22:17:29,153 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 22:17:29,153 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 22:17:29,262 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 22:17:29,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706287711] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 22:17:29,263 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 22:17:29,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 14 [2025-01-09 22:17:29,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772680247] [2025-01-09 22:17:29,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 22:17:29,263 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-01-09 22:17:29,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 22:17:29,264 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-01-09 22:17:29,264 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2025-01-09 22:17:29,264 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 15 states have internal predecessors, (25), 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 22:17:29,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 22:17:29,562 INFO L93 Difference]: Finished difference Result 61 states and 69 transitions. [2025-01-09 22:17:29,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-01-09 22:17:29,563 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 15 states have internal predecessors, (25), 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 9 [2025-01-09 22:17:29,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 22:17:29,564 INFO L225 Difference]: With dead ends: 61 [2025-01-09 22:17:29,564 INFO L226 Difference]: Without dead ends: 61 [2025-01-09 22:17:29,564 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2025-01-09 22:17:29,565 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 201 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-09 22:17:29,565 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 170 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-09 22:17:29,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2025-01-09 22:17:29,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 56. [2025-01-09 22:17:29,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 42 states have (on average 1.5) internal successors, (63), 55 states have internal predecessors, (63), 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 22:17:29,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 63 transitions. [2025-01-09 22:17:29,568 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 63 transitions. Word has length 9 [2025-01-09 22:17:29,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 22:17:29,568 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 63 transitions. [2025-01-09 22:17:29,568 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 15 states have internal predecessors, (25), 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 22:17:29,568 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 63 transitions. [2025-01-09 22:17:29,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2025-01-09 22:17:29,568 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 22:17:29,568 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 22:17:29,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-01-09 22:17:29,773 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:17:29,773 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2025-01-09 22:17:29,774 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 22:17:29,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1143508843, now seen corresponding path program 1 times [2025-01-09 22:17:29,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 22:17:29,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954219515] [2025-01-09 22:17:29,774 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:17:29,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 22:17:29,779 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-01-09 22:17:29,785 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-01-09 22:17:29,785 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:17:29,785 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:17:29,823 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 22:17:29,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 22:17:29,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954219515] [2025-01-09 22:17:29,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954219515] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 22:17:29,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 22:17:29,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-01-09 22:17:29,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481016087] [2025-01-09 22:17:29,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 22:17:29,824 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-01-09 22:17:29,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 22:17:29,824 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-01-09 22:17:29,824 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-01-09 22:17:29,824 INFO L87 Difference]: Start difference. First operand 56 states and 63 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 22:17:29,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 22:17:29,868 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2025-01-09 22:17:29,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-01-09 22:17:29,868 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2025-01-09 22:17:29,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 22:17:29,868 INFO L225 Difference]: With dead ends: 54 [2025-01-09 22:17:29,868 INFO L226 Difference]: Without dead ends: 54 [2025-01-09 22:17:29,868 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2025-01-09 22:17:29,869 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 16 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-09 22:17:29,869 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 59 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-09 22:17:29,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2025-01-09 22:17:29,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2025-01-09 22:17:29,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 42 states have (on average 1.4285714285714286) internal successors, (60), 53 states have internal predecessors, (60), 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 22:17:29,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2025-01-09 22:17:29,875 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 10 [2025-01-09 22:17:29,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 22:17:29,875 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2025-01-09 22:17:29,875 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 22:17:29,875 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2025-01-09 22:17:29,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2025-01-09 22:17:29,875 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 22:17:29,875 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 22:17:29,875 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-01-09 22:17:29,875 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2025-01-09 22:17:29,875 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 22:17:29,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1143508844, now seen corresponding path program 1 times [2025-01-09 22:17:29,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 22:17:29,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376904304] [2025-01-09 22:17:29,876 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:17:29,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 22:17:29,884 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-01-09 22:17:29,887 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-01-09 22:17:29,887 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:17:29,888 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:17:29,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 22:17:29,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 22:17:29,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376904304] [2025-01-09 22:17:29,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376904304] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 22:17:29,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191980674] [2025-01-09 22:17:29,925 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:17:29,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:17:29,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 22:17:29,931 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 22:17:29,934 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 22:17:29,964 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-01-09 22:17:29,972 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-01-09 22:17:29,972 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:17:29,972 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:17:29,972 INFO L256 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-01-09 22:17:29,973 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 22:17:30,053 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 22:17:30,053 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 22:17:30,120 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 22:17:30,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191980674] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 22:17:30,120 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 22:17:30,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2025-01-09 22:17:30,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462197062] [2025-01-09 22:17:30,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 22:17:30,120 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-01-09 22:17:30,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 22:17:30,121 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-01-09 22:17:30,121 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2025-01-09 22:17:30,124 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 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 22:17:30,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 22:17:30,222 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2025-01-09 22:17:30,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-01-09 22:17:30,222 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2025-01-09 22:17:30,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 22:17:30,223 INFO L225 Difference]: With dead ends: 57 [2025-01-09 22:17:30,223 INFO L226 Difference]: Without dead ends: 57 [2025-01-09 22:17:30,223 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2025-01-09 22:17:30,223 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 72 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-09 22:17:30,224 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 112 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-09 22:17:30,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2025-01-09 22:17:30,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2025-01-09 22:17:30,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 53 states have internal predecessors, (57), 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 22:17:30,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2025-01-09 22:17:30,226 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 10 [2025-01-09 22:17:30,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 22:17:30,226 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2025-01-09 22:17:30,226 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 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 22:17:30,226 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2025-01-09 22:17:30,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2025-01-09 22:17:30,226 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 22:17:30,227 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1] [2025-01-09 22:17:30,232 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-01-09 22:17:30,427 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:17:30,427 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2025-01-09 22:17:30,427 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 22:17:30,427 INFO L85 PathProgramCache]: Analyzing trace with hash -2049599511, now seen corresponding path program 2 times [2025-01-09 22:17:30,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 22:17:30,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727269897] [2025-01-09 22:17:30,428 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 22:17:30,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 22:17:30,434 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-01-09 22:17:30,440 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-01-09 22:17:30,440 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 22:17:30,440 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:17:30,716 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 22:17:30,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 22:17:30,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727269897] [2025-01-09 22:17:30,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727269897] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 22:17:30,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192044593] [2025-01-09 22:17:30,716 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 22:17:30,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:17:30,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 22:17:30,719 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 22:17:30,721 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 22:17:30,761 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-01-09 22:17:30,775 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-01-09 22:17:30,776 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 22:17:30,776 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:17:30,776 INFO L256 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-01-09 22:17:30,778 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 22:17:30,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-01-09 22:17:30,790 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2025-01-09 22:17:30,793 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 10 treesize of output 8 [2025-01-09 22:17:31,062 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 22 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 22:17:31,063 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 22:17:31,394 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 22:17:31,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192044593] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 22:17:31,394 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 22:17:31,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2025-01-09 22:17:31,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104428914] [2025-01-09 22:17:31,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 22:17:31,394 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-01-09 22:17:31,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 22:17:31,395 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-01-09 22:17:31,395 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2025-01-09 22:17:31,395 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand has 23 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 23 states have internal predecessors, (52), 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 22:17:31,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 22:17:31,792 INFO L93 Difference]: Finished difference Result 70 states and 78 transitions. [2025-01-09 22:17:31,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-01-09 22:17:31,793 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 23 states have internal predecessors, (52), 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 18 [2025-01-09 22:17:31,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 22:17:31,794 INFO L225 Difference]: With dead ends: 70 [2025-01-09 22:17:31,794 INFO L226 Difference]: Without dead ends: 70 [2025-01-09 22:17:31,794 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=240, Invalid=690, Unknown=0, NotChecked=0, Total=930 [2025-01-09 22:17:31,794 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 219 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-01-09 22:17:31,794 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 115 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 372 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-01-09 22:17:31,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2025-01-09 22:17:31,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 67. [2025-01-09 22:17:31,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 56 states have (on average 1.3035714285714286) internal successors, (73), 66 states have internal predecessors, (73), 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 22:17:31,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 73 transitions. [2025-01-09 22:17:31,799 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 73 transitions. Word has length 18 [2025-01-09 22:17:31,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 22:17:31,799 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 73 transitions. [2025-01-09 22:17:31,799 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 23 states have internal predecessors, (52), 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 22:17:31,799 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 73 transitions. [2025-01-09 22:17:31,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2025-01-09 22:17:31,800 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 22:17:31,800 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 22:17:31,807 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 22:17:32,005 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:17:32,005 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2025-01-09 22:17:32,005 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 22:17:32,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1266984883, now seen corresponding path program 2 times [2025-01-09 22:17:32,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 22:17:32,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792437677] [2025-01-09 22:17:32,005 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 22:17:32,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 22:17:32,012 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 25 statements into 2 equivalence classes. [2025-01-09 22:17:32,019 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 7 of 25 statements. [2025-01-09 22:17:32,022 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-01-09 22:17:32,022 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:17:32,128 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2025-01-09 22:17:32,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 22:17:32,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792437677] [2025-01-09 22:17:32,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792437677] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 22:17:32,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 22:17:32,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-01-09 22:17:32,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694452761] [2025-01-09 22:17:32,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 22:17:32,129 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-01-09 22:17:32,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 22:17:32,129 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-01-09 22:17:32,130 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-01-09 22:17:32,130 INFO L87 Difference]: Start difference. First operand 67 states and 73 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 22:17:32,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 22:17:32,178 INFO L93 Difference]: Finished difference Result 55 states and 59 transitions. [2025-01-09 22:17:32,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-01-09 22:17:32,179 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2025-01-09 22:17:32,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 22:17:32,179 INFO L225 Difference]: With dead ends: 55 [2025-01-09 22:17:32,179 INFO L226 Difference]: Without dead ends: 55 [2025-01-09 22:17:32,179 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2025-01-09 22:17:32,180 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 26 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-09 22:17:32,180 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 37 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-09 22:17:32,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2025-01-09 22:17:32,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2025-01-09 22:17:32,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.18) internal successors, (59), 54 states have internal predecessors, (59), 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 22:17:32,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2025-01-09 22:17:32,182 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 25 [2025-01-09 22:17:32,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 22:17:32,182 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2025-01-09 22:17:32,182 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 22:17:32,182 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2025-01-09 22:17:32,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2025-01-09 22:17:32,183 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 22:17:32,183 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 22:17:32,183 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2025-01-09 22:17:32,183 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2025-01-09 22:17:32,183 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 22:17:32,183 INFO L85 PathProgramCache]: Analyzing trace with hash -574088080, now seen corresponding path program 1 times [2025-01-09 22:17:32,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 22:17:32,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341333885] [2025-01-09 22:17:32,184 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:17:32,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 22:17:32,189 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-01-09 22:17:32,193 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-01-09 22:17:32,194 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:17:32,194 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:17:32,278 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-09 22:17:32,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 22:17:32,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341333885] [2025-01-09 22:17:32,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341333885] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 22:17:32,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938123781] [2025-01-09 22:17:32,278 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:17:32,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:17:32,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 22:17:32,281 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 22:17:32,286 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 22:17:32,320 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-01-09 22:17:32,334 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-01-09 22:17:32,334 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:17:32,335 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:17:32,335 INFO L256 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-01-09 22:17:32,336 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 22:17:32,425 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-09 22:17:32,425 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 22:17:32,523 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-09 22:17:32,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938123781] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 22:17:32,523 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 22:17:32,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2025-01-09 22:17:32,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579441632] [2025-01-09 22:17:32,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 22:17:32,524 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-01-09 22:17:32,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 22:17:32,524 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-01-09 22:17:32,524 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=341, Unknown=0, NotChecked=0, Total=600 [2025-01-09 22:17:32,524 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand has 25 states, 25 states have (on average 2.76) internal successors, (69), 25 states have internal predecessors, (69), 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 22:17:32,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 22:17:32,696 INFO L93 Difference]: Finished difference Result 103 states and 121 transitions. [2025-01-09 22:17:32,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-01-09 22:17:32,697 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 25 states have internal predecessors, (69), 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 22:17:32,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 22:17:32,697 INFO L225 Difference]: With dead ends: 103 [2025-01-09 22:17:32,697 INFO L226 Difference]: Without dead ends: 103 [2025-01-09 22:17:32,698 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=392, Invalid=600, Unknown=0, NotChecked=0, Total=992 [2025-01-09 22:17:32,698 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 283 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-09 22:17:32,698 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [283 Valid, 74 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-09 22:17:32,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2025-01-09 22:17:32,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 85. [2025-01-09 22:17:32,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 80 states have (on average 1.1375) internal successors, (91), 84 states have internal predecessors, (91), 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 22:17:32,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 91 transitions. [2025-01-09 22:17:32,701 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 91 transitions. Word has length 28 [2025-01-09 22:17:32,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 22:17:32,701 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 91 transitions. [2025-01-09 22:17:32,701 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 25 states have internal predecessors, (69), 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 22:17:32,701 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 91 transitions. [2025-01-09 22:17:32,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2025-01-09 22:17:32,702 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 22:17:32,702 INFO L218 NwaCegarLoop]: trace histogram [14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 22:17:32,708 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 22:17:32,906 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,SelfDestructingSolverStorable10 [2025-01-09 22:17:32,907 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2025-01-09 22:17:32,907 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 22:17:32,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1613123056, now seen corresponding path program 2 times [2025-01-09 22:17:32,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 22:17:32,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088200416] [2025-01-09 22:17:32,907 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 22:17:32,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 22:17:32,916 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 52 statements into 2 equivalence classes. [2025-01-09 22:17:32,925 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 52 of 52 statements. [2025-01-09 22:17:32,925 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 22:17:32,925 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:17:33,284 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2025-01-09 22:17:33,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 22:17:33,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088200416] [2025-01-09 22:17:33,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088200416] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 22:17:33,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639389480] [2025-01-09 22:17:33,284 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 22:17:33,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:17:33,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 22:17:33,286 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 22:17:33,288 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 22:17:33,333 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 52 statements into 2 equivalence classes. [2025-01-09 22:17:33,353 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 52 of 52 statements. [2025-01-09 22:17:33,353 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 22:17:33,353 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:17:33,354 INFO L256 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-01-09 22:17:33,355 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 22:17:33,634 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-09 22:17:33,634 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 22:17:33,955 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-09 22:17:33,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639389480] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 22:17:33,956 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 22:17:33,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 18, 18] total 39 [2025-01-09 22:17:33,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911373916] [2025-01-09 22:17:33,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 22:17:33,956 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2025-01-09 22:17:33,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 22:17:33,957 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2025-01-09 22:17:33,958 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=548, Invalid=934, Unknown=0, NotChecked=0, Total=1482 [2025-01-09 22:17:33,958 INFO L87 Difference]: Start difference. First operand 85 states and 91 transitions. Second operand has 39 states, 39 states have (on average 2.7948717948717947) internal successors, (109), 39 states have internal predecessors, (109), 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 22:17:35,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 22:17:35,811 INFO L93 Difference]: Finished difference Result 198 states and 213 transitions. [2025-01-09 22:17:35,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2025-01-09 22:17:35,811 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.7948717948717947) internal successors, (109), 39 states have internal predecessors, (109), 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 52 [2025-01-09 22:17:35,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 22:17:35,813 INFO L225 Difference]: With dead ends: 198 [2025-01-09 22:17:35,813 INFO L226 Difference]: Without dead ends: 198 [2025-01-09 22:17:35,816 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1570 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2285, Invalid=4687, Unknown=0, NotChecked=0, Total=6972 [2025-01-09 22:17:35,816 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 518 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 518 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-01-09 22:17:35,816 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [518 Valid, 55 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-01-09 22:17:35,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2025-01-09 22:17:35,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 156. [2025-01-09 22:17:35,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 152 states have (on average 1.0328947368421053) internal successors, (157), 155 states have internal predecessors, (157), 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 22:17:35,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 157 transitions. [2025-01-09 22:17:35,826 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 157 transitions. Word has length 52 [2025-01-09 22:17:35,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 22:17:35,826 INFO L471 AbstractCegarLoop]: Abstraction has 156 states and 157 transitions. [2025-01-09 22:17:35,826 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.7948717948717947) internal successors, (109), 39 states have internal predecessors, (109), 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 22:17:35,826 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 157 transitions. [2025-01-09 22:17:35,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2025-01-09 22:17:35,831 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 22:17:35,831 INFO L218 NwaCegarLoop]: trace histogram [30, 30, 30, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 22:17:35,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-01-09 22:17:36,032 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,SelfDestructingSolverStorable11 [2025-01-09 22:17:36,032 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2025-01-09 22:17:36,032 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 22:17:36,033 INFO L85 PathProgramCache]: Analyzing trace with hash -1596012669, now seen corresponding path program 1 times [2025-01-09 22:17:36,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 22:17:36,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488637160] [2025-01-09 22:17:36,033 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:17:36,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 22:17:36,048 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 146 statements into 1 equivalence classes. [2025-01-09 22:17:36,058 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 146 of 146 statements. [2025-01-09 22:17:36,058 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:17:36,058 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:17:36,120 INFO L134 CoverageAnalysis]: Checked inductivity of 1665 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1665 trivial. 0 not checked. [2025-01-09 22:17:36,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 22:17:36,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488637160] [2025-01-09 22:17:36,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488637160] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 22:17:36,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 22:17:36,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-01-09 22:17:36,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340651584] [2025-01-09 22:17:36,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 22:17:36,121 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-01-09 22:17:36,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 22:17:36,122 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-01-09 22:17:36,122 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-01-09 22:17:36,122 INFO L87 Difference]: Start difference. First operand 156 states and 157 transitions. Second operand has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 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 22:17:36,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 22:17:36,129 INFO L93 Difference]: Finished difference Result 154 states and 155 transitions. [2025-01-09 22:17:36,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-01-09 22:17:36,129 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 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 146 [2025-01-09 22:17:36,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 22:17:36,130 INFO L225 Difference]: With dead ends: 154 [2025-01-09 22:17:36,130 INFO L226 Difference]: Without dead ends: 154 [2025-01-09 22:17:36,130 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 22:17:36,131 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 8 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-09 22:17:36,131 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 18 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-09 22:17:36,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2025-01-09 22:17:36,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2025-01-09 22:17:36,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 152 states have (on average 1.019736842105263) internal successors, (155), 153 states have internal predecessors, (155), 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 22:17:36,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 155 transitions. [2025-01-09 22:17:36,134 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 155 transitions. Word has length 146 [2025-01-09 22:17:36,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 22:17:36,134 INFO L471 AbstractCegarLoop]: Abstraction has 154 states and 155 transitions. [2025-01-09 22:17:36,134 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 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 22:17:36,134 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 155 transitions. [2025-01-09 22:17:36,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2025-01-09 22:17:36,135 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 22:17:36,135 INFO L218 NwaCegarLoop]: trace histogram [30, 30, 30, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 22:17:36,135 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2025-01-09 22:17:36,135 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2025-01-09 22:17:36,135 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 22:17:36,135 INFO L85 PathProgramCache]: Analyzing trace with hash -464847547, now seen corresponding path program 1 times [2025-01-09 22:17:36,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 22:17:36,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815497735] [2025-01-09 22:17:36,135 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:17:36,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 22:17:36,149 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 148 statements into 1 equivalence classes. [2025-01-09 22:17:36,175 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 148 of 148 statements. [2025-01-09 22:17:36,175 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:17:36,175 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:17:36,980 INFO L134 CoverageAnalysis]: Checked inductivity of 1665 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2025-01-09 22:17:36,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 22:17:36,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815497735] [2025-01-09 22:17:36,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815497735] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 22:17:36,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453194503] [2025-01-09 22:17:36,980 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 22:17:36,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:17:36,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 22:17:36,982 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 22:17:36,998 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 22:17:37,052 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 148 statements into 1 equivalence classes. [2025-01-09 22:17:37,096 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 148 of 148 statements. [2025-01-09 22:17:37,097 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 22:17:37,097 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:17:37,098 INFO L256 TraceCheckSpWp]: Trace formula consists of 582 conjuncts, 33 conjuncts are in the unsatisfiable core [2025-01-09 22:17:37,101 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 22:17:37,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1665 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2025-01-09 22:17:37,729 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 22:17:38,895 INFO L134 CoverageAnalysis]: Checked inductivity of 1665 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2025-01-09 22:17:38,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453194503] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 22:17:38,896 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 22:17:38,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 97 [2025-01-09 22:17:38,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077041539] [2025-01-09 22:17:38,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 22:17:38,897 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2025-01-09 22:17:38,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 22:17:38,898 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2025-01-09 22:17:38,900 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=4099, Invalid=5213, Unknown=0, NotChecked=0, Total=9312 [2025-01-09 22:17:38,900 INFO L87 Difference]: Start difference. First operand 154 states and 155 transitions. Second operand has 97 states, 97 states have (on average 3.0103092783505154) internal successors, (292), 97 states have internal predecessors, (292), 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 22:17:40,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 22:17:40,594 INFO L93 Difference]: Finished difference Result 388 states and 419 transitions. [2025-01-09 22:17:40,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2025-01-09 22:17:40,594 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 3.0103092783505154) internal successors, (292), 97 states have internal predecessors, (292), 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 148 [2025-01-09 22:17:40,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 22:17:40,595 INFO L225 Difference]: With dead ends: 388 [2025-01-09 22:17:40,595 INFO L226 Difference]: Without dead ends: 388 [2025-01-09 22:17:40,598 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5825 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=6176, Invalid=10080, Unknown=0, NotChecked=0, Total=16256 [2025-01-09 22:17:40,598 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 1154 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 345 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1154 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 345 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-01-09 22:17:40,599 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1154 Valid, 40 Invalid, 775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [345 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-01-09 22:17:40,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2025-01-09 22:17:40,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 298. [2025-01-09 22:17:40,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 296 states have (on average 1.010135135135135) internal successors, (299), 297 states have internal predecessors, (299), 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 22:17:40,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 299 transitions. [2025-01-09 22:17:40,603 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 299 transitions. Word has length 148 [2025-01-09 22:17:40,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 22:17:40,603 INFO L471 AbstractCegarLoop]: Abstraction has 298 states and 299 transitions. [2025-01-09 22:17:40,604 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 3.0103092783505154) internal successors, (292), 97 states have internal predecessors, (292), 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 22:17:40,604 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 299 transitions. [2025-01-09 22:17:40,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2025-01-09 22:17:40,606 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 22:17:40,606 INFO L218 NwaCegarLoop]: trace histogram [62, 62, 62, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 22:17:40,612 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-01-09 22:17:40,806 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,SelfDestructingSolverStorable13 [2025-01-09 22:17:40,806 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2025-01-09 22:17:40,807 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 22:17:40,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1885636027, now seen corresponding path program 2 times [2025-01-09 22:17:40,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 22:17:40,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589323574] [2025-01-09 22:17:40,807 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 22:17:40,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 22:17:40,832 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 292 statements into 2 equivalence classes. [2025-01-09 22:17:40,861 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 292 of 292 statements. [2025-01-09 22:17:40,862 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 22:17:40,862 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:17:41,951 INFO L134 CoverageAnalysis]: Checked inductivity of 7161 backedges. 0 proven. 1426 refuted. 0 times theorem prover too weak. 5735 trivial. 0 not checked. [2025-01-09 22:17:41,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 22:17:41,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589323574] [2025-01-09 22:17:41,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589323574] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 22:17:41,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667300282] [2025-01-09 22:17:41,951 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 22:17:41,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:17:41,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 22:17:41,954 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 22:17:41,955 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 22:17:42,045 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 292 statements into 2 equivalence classes. [2025-01-09 22:17:42,135 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 292 of 292 statements. [2025-01-09 22:17:42,135 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 22:17:42,135 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:17:42,144 INFO L256 TraceCheckSpWp]: Trace formula consists of 1110 conjuncts, 65 conjuncts are in the unsatisfiable core [2025-01-09 22:17:42,150 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 22:17:44,206 INFO L134 CoverageAnalysis]: Checked inductivity of 7161 backedges. 0 proven. 5735 refuted. 0 times theorem prover too weak. 1426 trivial. 0 not checked. [2025-01-09 22:17:44,206 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 22:17:47,255 INFO L134 CoverageAnalysis]: Checked inductivity of 7161 backedges. 0 proven. 5735 refuted. 0 times theorem prover too weak. 1426 trivial. 0 not checked. [2025-01-09 22:17:47,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667300282] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 22:17:47,256 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 22:17:47,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 66, 66] total 162 [2025-01-09 22:17:47,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097652294] [2025-01-09 22:17:47,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 22:17:47,256 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 162 states [2025-01-09 22:17:47,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 22:17:47,259 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 162 interpolants. [2025-01-09 22:17:47,263 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9346, Invalid=16736, Unknown=0, NotChecked=0, Total=26082 [2025-01-09 22:17:47,264 INFO L87 Difference]: Start difference. First operand 298 states and 299 transitions. Second operand has 162 states, 162 states have (on average 3.04320987654321) internal successors, (493), 162 states have internal predecessors, (493), 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 22:17:53,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 22:17:53,773 INFO L93 Difference]: Finished difference Result 772 states and 835 transitions. [2025-01-09 22:17:53,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2025-01-09 22:17:53,774 INFO L78 Accepts]: Start accepts. Automaton has has 162 states, 162 states have (on average 3.04320987654321) internal successors, (493), 162 states have internal predecessors, (493), 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 292 [2025-01-09 22:17:53,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 22:17:53,777 INFO L225 Difference]: With dead ends: 772 [2025-01-09 22:17:53,777 INFO L226 Difference]: Without dead ends: 772 [2025-01-09 22:17:53,782 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 744 GetRequests, 520 SyntacticMatches, 0 SemanticMatches, 224 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16093 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=17761, Invalid=33089, Unknown=0, NotChecked=0, Total=50850 [2025-01-09 22:17:53,783 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 1294 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 949 mSolverCounterSat, 447 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1294 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 1396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 447 IncrementalHoareTripleChecker+Valid, 949 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2025-01-09 22:17:53,783 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1294 Valid, 178 Invalid, 1396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [447 Valid, 949 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2025-01-09 22:17:53,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 772 states. [2025-01-09 22:17:53,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 772 to 586. [2025-01-09 22:17:53,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 584 states have (on average 1.00513698630137) internal successors, (587), 585 states have internal predecessors, (587), 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 22:17:53,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 587 transitions. [2025-01-09 22:17:53,790 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 587 transitions. Word has length 292 [2025-01-09 22:17:53,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 22:17:53,791 INFO L471 AbstractCegarLoop]: Abstraction has 586 states and 587 transitions. [2025-01-09 22:17:53,791 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 162 states, 162 states have (on average 3.04320987654321) internal successors, (493), 162 states have internal predecessors, (493), 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 22:17:53,791 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 587 transitions. [2025-01-09 22:17:53,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 581 [2025-01-09 22:17:53,796 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 22:17:53,796 INFO L218 NwaCegarLoop]: trace histogram [126, 126, 126, 63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 22:17:53,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-01-09 22:17:53,996 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:17:53,997 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2025-01-09 22:17:53,997 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 22:17:53,997 INFO L85 PathProgramCache]: Analyzing trace with hash -288459707, now seen corresponding path program 3 times [2025-01-09 22:17:53,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 22:17:53,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163986276] [2025-01-09 22:17:53,997 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 22:17:53,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 22:17:54,054 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 580 statements into 127 equivalence classes. [2025-01-09 22:17:54,498 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) and asserted 391 of 580 statements. [2025-01-09 22:17:54,499 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2025-01-09 22:17:54,499 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 22:17:57,337 INFO L134 CoverageAnalysis]: Checked inductivity of 29673 backedges. 0 proven. 5922 refuted. 0 times theorem prover too weak. 23751 trivial. 0 not checked. [2025-01-09 22:17:57,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 22:17:57,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163986276] [2025-01-09 22:17:57,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163986276] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 22:17:57,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890701629] [2025-01-09 22:17:57,338 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 22:17:57,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 22:17:57,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 22:17:57,340 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 22:17:57,341 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 22:17:57,483 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 580 statements into 127 equivalence classes.