./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/termination-memory-alloca/strreplace-alloca-1.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version da043454 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/termination-memory-alloca/strreplace-alloca-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/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 64bit --witnessprinter.graph.data.programhash d4de5096855b305f822a5b563f81ee8d3b63add498dc60d311755a4f31b28f6b --- Real Ultimate output --- This is Ultimate 0.3.0-wip.fs.system-includes-da04345-m [2025-04-30 10:49:05,392 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-04-30 10:49:05,441 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2025-04-30 10:49:05,448 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-04-30 10:49:05,448 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-04-30 10:49:05,476 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-04-30 10:49:05,478 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-04-30 10:49:05,478 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-04-30 10:49:05,478 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-04-30 10:49:05,479 INFO L153 SettingsManager]: * Use memory slicer=true [2025-04-30 10:49:05,479 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-04-30 10:49:05,479 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-04-30 10:49:05,480 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-04-30 10:49:05,480 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-04-30 10:49:05,480 INFO L153 SettingsManager]: * Use SBE=true [2025-04-30 10:49:05,480 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-04-30 10:49:05,480 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-04-30 10:49:05,480 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-04-30 10:49:05,481 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-04-30 10:49:05,481 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-04-30 10:49:05,481 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-04-30 10:49:05,481 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-04-30 10:49:05,481 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-04-30 10:49:05,481 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-04-30 10:49:05,481 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-04-30 10:49:05,481 INFO L153 SettingsManager]: * Use constant arrays=true [2025-04-30 10:49:05,481 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-04-30 10:49:05,481 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-30 10:49:05,482 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-30 10:49:05,482 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-30 10:49:05,482 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-30 10:49:05,482 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-04-30 10:49:05,482 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-30 10:49:05,482 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-30 10:49:05,482 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-30 10:49:05,482 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-30 10:49:05,482 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-04-30 10:49:05,482 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-04-30 10:49:05,482 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-04-30 10:49:05,482 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-04-30 10:49:05,482 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-04-30 10:49:05,482 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-04-30 10:49:05,482 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-04-30 10:49:05,482 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/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 -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d4de5096855b305f822a5b563f81ee8d3b63add498dc60d311755a4f31b28f6b [2025-04-30 10:49:05,701 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-04-30 10:49:05,710 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-04-30 10:49:05,712 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-04-30 10:49:05,713 INFO L270 PluginConnector]: Initializing CDTParser... [2025-04-30 10:49:05,713 INFO L274 PluginConnector]: CDTParser initialized [2025-04-30 10:49:05,715 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/termination-memory-alloca/strreplace-alloca-1.i [2025-04-30 10:49:07,032 INFO L538 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f6353a795/ae0c827e9b1d43049bd6d58b0a4ac460/FLAG714b050b1 [2025-04-30 10:49:07,297 INFO L389 CDTParser]: Found 1 translation units. [2025-04-30 10:49:07,300 INFO L178 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/termination-memory-alloca/strreplace-alloca-1.i [2025-04-30 10:49:07,312 INFO L432 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f6353a795/ae0c827e9b1d43049bd6d58b0a4ac460/FLAG714b050b1 [2025-04-30 10:49:08,082 INFO L440 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f6353a795/ae0c827e9b1d43049bd6d58b0a4ac460 [2025-04-30 10:49:08,085 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-04-30 10:49:08,086 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-04-30 10:49:08,087 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-04-30 10:49:08,087 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-04-30 10:49:08,090 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-04-30 10:49:08,090 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.04 10:49:08" (1/1) ... [2025-04-30 10:49:08,091 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a3218aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:49:08, skipping insertion in model container [2025-04-30 10:49:08,091 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.04 10:49:08" (1/1) ... [2025-04-30 10:49:08,115 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-04-30 10:49:08,357 WARN L1150 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-04-30 10:49:08,361 INFO L211 PostProcessor]: Analyzing one entry point: main [2025-04-30 10:49:08,371 INFO L200 MainTranslator]: Completed pre-run [2025-04-30 10:49:08,433 INFO L211 PostProcessor]: Analyzing one entry point: main [2025-04-30 10:49:08,454 INFO L204 MainTranslator]: Completed translation [2025-04-30 10:49:08,454 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:49:08 WrapperNode [2025-04-30 10:49:08,454 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-04-30 10:49:08,455 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-04-30 10:49:08,455 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-04-30 10:49:08,455 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-04-30 10:49:08,459 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:49:08" (1/1) ... [2025-04-30 10:49:08,470 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:49:08" (1/1) ... [2025-04-30 10:49:08,486 INFO L138 Inliner]: procedures = 111, calls = 10, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 55 [2025-04-30 10:49:08,488 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-04-30 10:49:08,488 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-04-30 10:49:08,488 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-04-30 10:49:08,489 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-04-30 10:49:08,495 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:49:08" (1/1) ... [2025-04-30 10:49:08,495 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:49:08" (1/1) ... [2025-04-30 10:49:08,497 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:49:08" (1/1) ... [2025-04-30 10:49:08,512 INFO L175 MemorySlicer]: Split 4 memory accesses to 1 slices as follows [4]. 100 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0]. The 2 writes are split as follows [2]. [2025-04-30 10:49:08,513 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:49:08" (1/1) ... [2025-04-30 10:49:08,513 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:49:08" (1/1) ... [2025-04-30 10:49:08,519 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:49:08" (1/1) ... [2025-04-30 10:49:08,519 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:49:08" (1/1) ... [2025-04-30 10:49:08,524 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:49:08" (1/1) ... [2025-04-30 10:49:08,525 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:49:08" (1/1) ... [2025-04-30 10:49:08,525 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:49:08" (1/1) ... [2025-04-30 10:49:08,529 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-04-30 10:49:08,529 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-04-30 10:49:08,530 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-04-30 10:49:08,530 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-04-30 10:49:08,531 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:49:08" (1/1) ... [2025-04-30 10:49:08,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-30 10:49:08,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-30 10:49:08,556 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-04-30 10:49:08,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-04-30 10:49:08,580 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-04-30 10:49:08,580 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-04-30 10:49:08,580 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-04-30 10:49:08,580 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-04-30 10:49:08,580 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-04-30 10:49:08,580 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-04-30 10:49:08,655 INFO L234 CfgBuilder]: Building ICFG [2025-04-30 10:49:08,656 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-04-30 10:49:08,772 INFO L? ?]: Removed 31 outVars from TransFormulas that were not future-live. [2025-04-30 10:49:08,772 INFO L283 CfgBuilder]: Performing block encoding [2025-04-30 10:49:08,780 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-04-30 10:49:08,781 INFO L312 CfgBuilder]: Removed 1 assume(true) statements. [2025-04-30 10:49:08,782 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.04 10:49:08 BoogieIcfgContainer [2025-04-30 10:49:08,782 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-04-30 10:49:08,783 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-04-30 10:49:08,783 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-04-30 10:49:08,787 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-04-30 10:49:08,787 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.04 10:49:08" (1/3) ... [2025-04-30 10:49:08,787 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fb0fdfc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.04 10:49:08, skipping insertion in model container [2025-04-30 10:49:08,789 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.04 10:49:08" (2/3) ... [2025-04-30 10:49:08,789 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fb0fdfc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.04 10:49:08, skipping insertion in model container [2025-04-30 10:49:08,789 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.04 10:49:08" (3/3) ... [2025-04-30 10:49:08,790 INFO L128 eAbstractionObserver]: Analyzing ICFG strreplace-alloca-1.i [2025-04-30 10:49:08,801 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-04-30 10:49:08,802 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG strreplace-alloca-1.i that has 1 procedures, 27 locations, 30 edges, 1 initial locations, 1 loop locations, and 9 error locations. [2025-04-30 10:49:08,832 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-04-30 10:49:08,843 INFO L340 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;@4b96ad3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-30 10:49:08,844 INFO L341 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2025-04-30 10:49:08,848 INFO L278 IsEmpty]: Start isEmpty. Operand has 27 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 26 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-30 10:49:08,851 INFO L284 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2025-04-30 10:49:08,851 INFO L210 NwaCegarLoop]: Found error trace [2025-04-30 10:49:08,852 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2025-04-30 10:49:08,852 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2025-04-30 10:49:08,856 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-30 10:49:08,857 INFO L85 PathProgramCache]: Analyzing trace with hash 28693828, now seen corresponding path program 1 times [2025-04-30 10:49:08,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-30 10:49:08,863 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071869538] [2025-04-30 10:49:08,863 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-30 10:49:08,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-30 10:49:08,919 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-04-30 10:49:08,931 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-04-30 10:49:08,932 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-30 10:49:08,932 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:49:09,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-30 10:49:09,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-30 10:49:09,029 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071869538] [2025-04-30 10:49:09,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071869538] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-30 10:49:09,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-30 10:49:09,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-04-30 10:49:09,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668501470] [2025-04-30 10:49:09,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-30 10:49:09,034 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-04-30 10:49:09,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-30 10:49:09,051 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-04-30 10:49:09,051 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-04-30 10:49:09,052 INFO L87 Difference]: Start difference. First operand has 27 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 26 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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) [2025-04-30 10:49:09,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-04-30 10:49:09,093 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2025-04-30 10:49:09,094 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-30 10:49:09,095 INFO L79 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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 5 [2025-04-30 10:49:09,095 INFO L85 Accepts]: Finished accepts. some prefix is accepted. [2025-04-30 10:49:09,098 INFO L225 Difference]: With dead ends: 26 [2025-04-30 10:49:09,101 INFO L226 Difference]: Without dead ends: 24 [2025-04-30 10:49:09,102 INFO L436 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 [2025-04-30 10:49:09,104 INFO L437 NwaCegarLoop]: 25 mSDtfsCounter, 1 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-04-30 10:49:09,106 INFO L438 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 38 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-04-30 10:49:09,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2025-04-30 10:49:09,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2025-04-30 10:49:09,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.625) internal successors, (26), 23 states have internal predecessors, (26), 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) [2025-04-30 10:49:09,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2025-04-30 10:49:09,128 INFO L79 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 5 [2025-04-30 10:49:09,128 INFO L85 Accepts]: Finished accepts. word is rejected. [2025-04-30 10:49:09,128 INFO L485 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2025-04-30 10:49:09,128 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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) [2025-04-30 10:49:09,129 INFO L278 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2025-04-30 10:49:09,129 INFO L284 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2025-04-30 10:49:09,129 INFO L210 NwaCegarLoop]: Found error trace [2025-04-30 10:49:09,129 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2025-04-30 10:49:09,129 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-04-30 10:49:09,129 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2025-04-30 10:49:09,129 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-30 10:49:09,129 INFO L85 PathProgramCache]: Analyzing trace with hash 28693829, now seen corresponding path program 1 times [2025-04-30 10:49:09,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-30 10:49:09,130 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846510674] [2025-04-30 10:49:09,130 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-30 10:49:09,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-30 10:49:09,139 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-04-30 10:49:09,153 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-04-30 10:49:09,153 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-30 10:49:09,153 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:49:09,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-30 10:49:09,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-30 10:49:09,310 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846510674] [2025-04-30 10:49:09,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846510674] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-30 10:49:09,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-30 10:49:09,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-04-30 10:49:09,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223799601] [2025-04-30 10:49:09,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-30 10:49:09,312 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-04-30 10:49:09,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-30 10:49:09,313 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-04-30 10:49:09,313 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-04-30 10:49:09,313 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 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) [2025-04-30 10:49:09,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-04-30 10:49:09,333 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2025-04-30 10:49:09,333 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-04-30 10:49:09,334 INFO L79 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 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 5 [2025-04-30 10:49:09,334 INFO L85 Accepts]: Finished accepts. some prefix is accepted. [2025-04-30 10:49:09,334 INFO L225 Difference]: With dead ends: 26 [2025-04-30 10:49:09,334 INFO L226 Difference]: Without dead ends: 26 [2025-04-30 10:49:09,334 INFO L436 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 [2025-04-30 10:49:09,335 INFO L437 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-04-30 10:49:09,335 INFO L438 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-04-30 10:49:09,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2025-04-30 10:49:09,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2025-04-30 10:49:09,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 25 states have internal predecessors, (28), 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) [2025-04-30 10:49:09,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2025-04-30 10:49:09,337 INFO L79 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 5 [2025-04-30 10:49:09,337 INFO L85 Accepts]: Finished accepts. word is rejected. [2025-04-30 10:49:09,337 INFO L485 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2025-04-30 10:49:09,337 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 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) [2025-04-30 10:49:09,340 INFO L278 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2025-04-30 10:49:09,340 INFO L284 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2025-04-30 10:49:09,340 INFO L210 NwaCegarLoop]: Found error trace [2025-04-30 10:49:09,340 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2025-04-30 10:49:09,340 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-04-30 10:49:09,341 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2025-04-30 10:49:09,341 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-30 10:49:09,341 INFO L85 PathProgramCache]: Analyzing trace with hash 28695751, now seen corresponding path program 1 times [2025-04-30 10:49:09,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-30 10:49:09,342 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670078261] [2025-04-30 10:49:09,342 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-30 10:49:09,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-30 10:49:09,351 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-04-30 10:49:09,358 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-04-30 10:49:09,358 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-30 10:49:09,358 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:49:09,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-30 10:49:09,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-30 10:49:09,512 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670078261] [2025-04-30 10:49:09,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670078261] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-30 10:49:09,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-30 10:49:09,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-04-30 10:49:09,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571013487] [2025-04-30 10:49:09,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-30 10:49:09,513 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-04-30 10:49:09,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-30 10:49:09,513 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-04-30 10:49:09,513 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2025-04-30 10:49:09,513 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 5 states, 4 states have (on average 1.25) internal successors, (5), 5 states have internal predecessors, (5), 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) [2025-04-30 10:49:09,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-04-30 10:49:09,528 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2025-04-30 10:49:09,528 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-04-30 10:49:09,528 INFO L79 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 5 states have internal predecessors, (5), 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 5 [2025-04-30 10:49:09,528 INFO L85 Accepts]: Finished accepts. some prefix is accepted. [2025-04-30 10:49:09,529 INFO L225 Difference]: With dead ends: 25 [2025-04-30 10:49:09,529 INFO L226 Difference]: Without dead ends: 25 [2025-04-30 10:49:09,529 INFO L436 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2025-04-30 10:49:09,530 INFO L437 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-04-30 10:49:09,530 INFO L438 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-04-30 10:49:09,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2025-04-30 10:49:09,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2025-04-30 10:49:09,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 16 states have (on average 1.5625) internal successors, (25), 22 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) [2025-04-30 10:49:09,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2025-04-30 10:49:09,532 INFO L79 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 5 [2025-04-30 10:49:09,532 INFO L85 Accepts]: Finished accepts. word is rejected. [2025-04-30 10:49:09,532 INFO L485 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2025-04-30 10:49:09,532 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 5 states have internal predecessors, (5), 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) [2025-04-30 10:49:09,532 INFO L278 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2025-04-30 10:49:09,533 INFO L284 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2025-04-30 10:49:09,533 INFO L210 NwaCegarLoop]: Found error trace [2025-04-30 10:49:09,533 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-04-30 10:49:09,533 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-04-30 10:49:09,534 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2025-04-30 10:49:09,536 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-30 10:49:09,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1804964392, now seen corresponding path program 1 times [2025-04-30 10:49:09,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-30 10:49:09,536 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536189690] [2025-04-30 10:49:09,536 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-30 10:49:09,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-30 10:49:09,548 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-04-30 10:49:09,553 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-04-30 10:49:09,553 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-30 10:49:09,553 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:49:09,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-30 10:49:09,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-30 10:49:09,622 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536189690] [2025-04-30 10:49:09,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536189690] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-30 10:49:09,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-30 10:49:09,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-04-30 10:49:09,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109597394] [2025-04-30 10:49:09,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-30 10:49:09,623 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-04-30 10:49:09,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-30 10:49:09,623 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-04-30 10:49:09,624 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-04-30 10:49:09,624 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) 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) [2025-04-30 10:49:09,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-04-30 10:49:09,665 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2025-04-30 10:49:09,665 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-04-30 10:49:09,665 INFO L79 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) 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 [2025-04-30 10:49:09,665 INFO L85 Accepts]: Finished accepts. some prefix is accepted. [2025-04-30 10:49:09,667 INFO L225 Difference]: With dead ends: 20 [2025-04-30 10:49:09,667 INFO L226 Difference]: Without dead ends: 20 [2025-04-30 10:49:09,667 INFO L436 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-04-30 10:49:09,669 INFO L437 NwaCegarLoop]: 12 mSDtfsCounter, 9 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-04-30 10:49:09,669 INFO L438 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 22 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-04-30 10:49:09,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2025-04-30 10:49:09,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2025-04-30 10:49:09,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 16 states have (on average 1.375) internal successors, (22), 19 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) [2025-04-30 10:49:09,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2025-04-30 10:49:09,671 INFO L79 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 7 [2025-04-30 10:49:09,671 INFO L85 Accepts]: Finished accepts. word is rejected. [2025-04-30 10:49:09,671 INFO L485 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2025-04-30 10:49:09,671 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) 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) [2025-04-30 10:49:09,671 INFO L278 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2025-04-30 10:49:09,671 INFO L284 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2025-04-30 10:49:09,672 INFO L210 NwaCegarLoop]: Found error trace [2025-04-30 10:49:09,672 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-04-30 10:49:09,672 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-04-30 10:49:09,672 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2025-04-30 10:49:09,672 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-30 10:49:09,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1804964393, now seen corresponding path program 1 times [2025-04-30 10:49:09,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-30 10:49:09,672 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818237266] [2025-04-30 10:49:09,672 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-30 10:49:09,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-30 10:49:09,679 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-04-30 10:49:09,685 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-04-30 10:49:09,685 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-30 10:49:09,685 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:49:09,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-30 10:49:09,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-30 10:49:09,831 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818237266] [2025-04-30 10:49:09,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818237266] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-30 10:49:09,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-30 10:49:09,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-04-30 10:49:09,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184128618] [2025-04-30 10:49:09,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-30 10:49:09,832 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-04-30 10:49:09,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-30 10:49:09,832 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-04-30 10:49:09,833 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-04-30 10:49:09,833 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 6 states, 5 states have (on average 1.4) internal successors, (7), 6 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) [2025-04-30 10:49:09,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-04-30 10:49:09,874 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2025-04-30 10:49:09,875 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-04-30 10:49:09,875 INFO L79 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 6 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 [2025-04-30 10:49:09,875 INFO L85 Accepts]: Finished accepts. some prefix is accepted. [2025-04-30 10:49:09,876 INFO L225 Difference]: With dead ends: 29 [2025-04-30 10:49:09,876 INFO L226 Difference]: Without dead ends: 29 [2025-04-30 10:49:09,876 INFO L436 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-04-30 10:49:09,876 INFO L437 NwaCegarLoop]: 15 mSDtfsCounter, 9 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-04-30 10:49:09,876 INFO L438 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 49 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-04-30 10:49:09,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2025-04-30 10:49:09,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 25. [2025-04-30 10:49:09,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 21 states have (on average 1.380952380952381) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-30 10:49:09,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2025-04-30 10:49:09,878 INFO L79 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 7 [2025-04-30 10:49:09,878 INFO L85 Accepts]: Finished accepts. word is rejected. [2025-04-30 10:49:09,878 INFO L485 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2025-04-30 10:49:09,878 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 6 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) [2025-04-30 10:49:09,878 INFO L278 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2025-04-30 10:49:09,878 INFO L284 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2025-04-30 10:49:09,878 INFO L210 NwaCegarLoop]: Found error trace [2025-04-30 10:49:09,879 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-30 10:49:09,879 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-04-30 10:49:09,879 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2025-04-30 10:49:09,879 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-30 10:49:09,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1532119396, now seen corresponding path program 1 times [2025-04-30 10:49:09,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-30 10:49:09,879 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997841550] [2025-04-30 10:49:09,880 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-30 10:49:09,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-30 10:49:09,893 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-04-30 10:49:09,897 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-04-30 10:49:09,897 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-30 10:49:09,897 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:49:09,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-30 10:49:09,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-30 10:49:09,944 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997841550] [2025-04-30 10:49:09,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997841550] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-30 10:49:09,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-30 10:49:09,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-04-30 10:49:09,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222617373] [2025-04-30 10:49:09,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-30 10:49:09,944 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-04-30 10:49:09,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-30 10:49:09,946 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-04-30 10:49:09,946 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-04-30 10:49:09,946 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-30 10:49:09,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-04-30 10:49:09,962 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2025-04-30 10:49:09,962 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-04-30 10:49:09,962 INFO L79 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2025-04-30 10:49:09,962 INFO L85 Accepts]: Finished accepts. some prefix is accepted. [2025-04-30 10:49:09,963 INFO L225 Difference]: With dead ends: 24 [2025-04-30 10:49:09,963 INFO L226 Difference]: Without dead ends: 21 [2025-04-30 10:49:09,963 INFO L436 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-04-30 10:49:09,963 INFO L437 NwaCegarLoop]: 15 mSDtfsCounter, 11 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-04-30 10:49:09,964 INFO L438 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 28 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-04-30 10:49:09,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2025-04-30 10:49:09,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2025-04-30 10:49:09,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 20 states have internal predecessors, (24), 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) [2025-04-30 10:49:09,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2025-04-30 10:49:09,967 INFO L79 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 11 [2025-04-30 10:49:09,967 INFO L85 Accepts]: Finished accepts. word is rejected. [2025-04-30 10:49:09,967 INFO L485 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2025-04-30 10:49:09,967 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-30 10:49:09,967 INFO L278 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2025-04-30 10:49:09,968 INFO L284 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2025-04-30 10:49:09,968 INFO L210 NwaCegarLoop]: Found error trace [2025-04-30 10:49:09,968 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-30 10:49:09,968 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-04-30 10:49:09,968 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2025-04-30 10:49:09,968 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-30 10:49:09,968 INFO L85 PathProgramCache]: Analyzing trace with hash -253422426, now seen corresponding path program 1 times [2025-04-30 10:49:09,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-30 10:49:09,968 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832943911] [2025-04-30 10:49:09,968 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-30 10:49:09,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-30 10:49:09,974 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-04-30 10:49:09,982 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-04-30 10:49:09,983 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-30 10:49:09,983 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:49:10,105 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-30 10:49:10,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-30 10:49:10,106 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832943911] [2025-04-30 10:49:10,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832943911] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-30 10:49:10,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-30 10:49:10,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-04-30 10:49:10,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714722742] [2025-04-30 10:49:10,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-30 10:49:10,106 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-04-30 10:49:10,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-30 10:49:10,107 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-04-30 10:49:10,107 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2025-04-30 10:49:10,107 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 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) [2025-04-30 10:49:10,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-04-30 10:49:10,149 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2025-04-30 10:49:10,149 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-04-30 10:49:10,149 INFO L79 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 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 12 [2025-04-30 10:49:10,149 INFO L85 Accepts]: Finished accepts. some prefix is accepted. [2025-04-30 10:49:10,149 INFO L225 Difference]: With dead ends: 26 [2025-04-30 10:49:10,150 INFO L226 Difference]: Without dead ends: 21 [2025-04-30 10:49:10,151 INFO L436 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2025-04-30 10:49:10,151 INFO L437 NwaCegarLoop]: 14 mSDtfsCounter, 1 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-04-30 10:49:10,152 INFO L438 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 57 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-04-30 10:49:10,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2025-04-30 10:49:10,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2025-04-30 10:49:10,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 20 states have internal predecessors, (23), 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) [2025-04-30 10:49:10,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2025-04-30 10:49:10,155 INFO L79 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 12 [2025-04-30 10:49:10,156 INFO L85 Accepts]: Finished accepts. word is rejected. [2025-04-30 10:49:10,156 INFO L485 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2025-04-30 10:49:10,156 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 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) [2025-04-30 10:49:10,156 INFO L278 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2025-04-30 10:49:10,156 INFO L284 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2025-04-30 10:49:10,157 INFO L210 NwaCegarLoop]: Found error trace [2025-04-30 10:49:10,157 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-30 10:49:10,157 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-04-30 10:49:10,157 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2025-04-30 10:49:10,171 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-30 10:49:10,172 INFO L85 PathProgramCache]: Analyzing trace with hash -646449436, now seen corresponding path program 1 times [2025-04-30 10:49:10,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-30 10:49:10,172 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616235792] [2025-04-30 10:49:10,172 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-30 10:49:10,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-30 10:49:10,178 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-04-30 10:49:10,185 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-04-30 10:49:10,186 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-30 10:49:10,186 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:49:10,407 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-30 10:49:10,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-30 10:49:10,407 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616235792] [2025-04-30 10:49:10,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616235792] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-30 10:49:10,407 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41172423] [2025-04-30 10:49:10,408 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-30 10:49:10,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:49:10,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-30 10:49:10,410 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-30 10:49:10,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-04-30 10:49:10,445 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-04-30 10:49:10,458 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-04-30 10:49:10,458 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-30 10:49:10,458 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:49:10,460 INFO L256 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-04-30 10:49:10,463 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-30 10:49:10,511 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2025-04-30 10:49:10,621 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-30 10:49:10,622 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2025-04-30 10:49:10,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-30 10:49:10,709 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-30 10:49:10,899 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2025-04-30 10:49:10,905 INFO L354 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 15 treesize of output 11 [2025-04-30 10:49:10,912 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2025-04-30 10:49:10,924 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-30 10:49:10,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41172423] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-30 10:49:10,924 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-30 10:49:10,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 17 [2025-04-30 10:49:10,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463963543] [2025-04-30 10:49:10,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-30 10:49:10,925 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-04-30 10:49:10,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-30 10:49:10,925 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-04-30 10:49:10,925 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2025-04-30 10:49:10,925 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 18 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 18 states have internal predecessors, (28), 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) [2025-04-30 10:49:11,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-04-30 10:49:11,130 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2025-04-30 10:49:11,130 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-04-30 10:49:11,130 INFO L79 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 18 states have internal predecessors, (28), 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 12 [2025-04-30 10:49:11,130 INFO L85 Accepts]: Finished accepts. some prefix is accepted. [2025-04-30 10:49:11,131 INFO L225 Difference]: With dead ends: 29 [2025-04-30 10:49:11,131 INFO L226 Difference]: Without dead ends: 29 [2025-04-30 10:49:11,131 INFO L436 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2025-04-30 10:49:11,131 INFO L437 NwaCegarLoop]: 11 mSDtfsCounter, 29 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-04-30 10:49:11,132 INFO L438 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 107 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-04-30 10:49:11,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2025-04-30 10:49:11,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 22. [2025-04-30 10:49:11,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 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) [2025-04-30 10:49:11,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2025-04-30 10:49:11,133 INFO L79 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 12 [2025-04-30 10:49:11,133 INFO L85 Accepts]: Finished accepts. word is rejected. [2025-04-30 10:49:11,134 INFO L485 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2025-04-30 10:49:11,134 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 18 states have internal predecessors, (28), 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) [2025-04-30 10:49:11,134 INFO L278 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2025-04-30 10:49:11,134 INFO L284 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2025-04-30 10:49:11,134 INFO L210 NwaCegarLoop]: Found error trace [2025-04-30 10:49:11,134 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2025-04-30 10:49:11,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-04-30 10:49:11,335 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:49:11,335 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2025-04-30 10:49:11,335 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-30 10:49:11,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1006932789, now seen corresponding path program 2 times [2025-04-30 10:49:11,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-30 10:49:11,335 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486680895] [2025-04-30 10:49:11,335 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-30 10:49:11,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-30 10:49:11,342 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes. [2025-04-30 10:49:11,351 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-04-30 10:49:11,352 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-30 10:49:11,352 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:49:11,728 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-30 10:49:11,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-30 10:49:11,728 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486680895] [2025-04-30 10:49:11,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486680895] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-30 10:49:11,728 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782291938] [2025-04-30 10:49:11,728 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-30 10:49:11,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:49:11,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-30 10:49:11,730 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-30 10:49:11,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-04-30 10:49:11,765 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes. [2025-04-30 10:49:11,777 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-04-30 10:49:11,777 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-30 10:49:11,777 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:49:11,778 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 37 conjuncts are in the unsatisfiable core [2025-04-30 10:49:11,780 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-30 10:49:11,814 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2025-04-30 10:49:12,283 INFO L325 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2025-04-30 10:49:12,283 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 23 [2025-04-30 10:49:12,327 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-30 10:49:12,327 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-30 10:49:12,598 INFO L354 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 21 treesize of output 17 [2025-04-30 10:49:12,604 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2025-04-30 10:49:12,610 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2025-04-30 10:49:12,658 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-30 10:49:12,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782291938] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-30 10:49:12,658 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-30 10:49:12,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 26 [2025-04-30 10:49:12,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807927568] [2025-04-30 10:49:12,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-30 10:49:12,660 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-04-30 10:49:12,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-30 10:49:12,660 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-04-30 10:49:12,660 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=605, Unknown=1, NotChecked=0, Total=702 [2025-04-30 10:49:12,661 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 27 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 27 states have internal predecessors, (42), 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) [2025-04-30 10:49:17,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-04-30 10:49:17,806 INFO L93 Difference]: Finished difference Result 59 states and 66 transitions. [2025-04-30 10:49:17,807 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-04-30 10:49:17,808 INFO L79 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 27 states have internal predecessors, (42), 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 17 [2025-04-30 10:49:17,808 INFO L85 Accepts]: Finished accepts. some prefix is accepted. [2025-04-30 10:49:17,808 INFO L225 Difference]: With dead ends: 59 [2025-04-30 10:49:17,808 INFO L226 Difference]: Without dead ends: 59 [2025-04-30 10:49:17,809 INFO L436 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=335, Invalid=1726, Unknown=9, NotChecked=0, Total=2070 [2025-04-30 10:49:17,809 INFO L437 NwaCegarLoop]: 13 mSDtfsCounter, 86 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 18 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2025-04-30 10:49:17,809 INFO L438 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 163 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 265 Invalid, 7 Unknown, 0 Unchecked, 2.3s Time] [2025-04-30 10:49:17,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2025-04-30 10:49:17,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 39. [2025-04-30 10:49:17,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 38 states have internal predecessors, (44), 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) [2025-04-30 10:49:17,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2025-04-30 10:49:17,813 INFO L79 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 17 [2025-04-30 10:49:17,813 INFO L85 Accepts]: Finished accepts. word is rejected. [2025-04-30 10:49:17,813 INFO L485 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2025-04-30 10:49:17,813 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 27 states have internal predecessors, (42), 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) [2025-04-30 10:49:17,813 INFO L278 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2025-04-30 10:49:17,813 INFO L284 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2025-04-30 10:49:17,813 INFO L210 NwaCegarLoop]: Found error trace [2025-04-30 10:49:17,813 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-30 10:49:17,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-04-30 10:49:18,017 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2025-04-30 10:49:18,017 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2025-04-30 10:49:18,018 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-30 10:49:18,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1588952255, now seen corresponding path program 1 times [2025-04-30 10:49:18,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-30 10:49:18,018 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434196235] [2025-04-30 10:49:18,018 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-30 10:49:18,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-30 10:49:18,027 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-04-30 10:49:18,043 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-04-30 10:49:18,044 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-30 10:49:18,044 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:49:18,554 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-30 10:49:18,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-30 10:49:18,554 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434196235] [2025-04-30 10:49:18,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434196235] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-30 10:49:18,554 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661668074] [2025-04-30 10:49:18,555 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-30 10:49:18,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:49:18,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-30 10:49:18,556 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-30 10:49:18,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-04-30 10:49:18,591 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-04-30 10:49:18,605 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-04-30 10:49:18,605 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-30 10:49:18,605 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-30 10:49:18,606 INFO L256 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 42 conjuncts are in the unsatisfiable core [2025-04-30 10:49:18,608 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-30 10:49:18,618 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2025-04-30 10:49:18,816 INFO L325 Elim1Store]: treesize reduction 35, result has 35.2 percent of original size [2025-04-30 10:49:18,816 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 26 [2025-04-30 10:49:19,253 INFO L325 Elim1Store]: treesize reduction 4, result has 82.6 percent of original size [2025-04-30 10:49:19,254 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 29 [2025-04-30 10:49:19,317 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-30 10:49:19,317 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-30 10:49:19,804 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 38 [2025-04-30 10:49:19,808 INFO L354 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 15 treesize of output 11 [2025-04-30 10:49:19,818 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 58 [2025-04-30 10:49:19,830 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-30 10:49:19,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661668074] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-30 10:49:19,831 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-30 10:49:19,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 34 [2025-04-30 10:49:19,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949283702] [2025-04-30 10:49:19,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-30 10:49:19,831 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2025-04-30 10:49:19,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-30 10:49:19,832 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2025-04-30 10:49:19,833 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1032, Unknown=0, NotChecked=0, Total=1190 [2025-04-30 10:49:19,833 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand has 35 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 35 states have internal predecessors, (61), 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) [2025-04-30 10:49:21,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-04-30 10:49:21,846 INFO L93 Difference]: Finished difference Result 96 states and 107 transitions. [2025-04-30 10:49:21,846 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2025-04-30 10:49:21,846 INFO L79 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 35 states have internal predecessors, (61), 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 24 [2025-04-30 10:49:21,846 INFO L85 Accepts]: Finished accepts. some prefix is accepted. [2025-04-30 10:49:21,846 INFO L225 Difference]: With dead ends: 96 [2025-04-30 10:49:21,846 INFO L226 Difference]: Without dead ends: 0 [2025-04-30 10:49:21,848 INFO L436 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 682 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=603, Invalid=2819, Unknown=0, NotChecked=0, Total=3422 [2025-04-30 10:49:21,848 INFO L437 NwaCegarLoop]: 15 mSDtfsCounter, 49 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-04-30 10:49:21,848 INFO L438 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 219 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-04-30 10:49:21,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2025-04-30 10:49:21,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2025-04-30 10:49:21,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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) [2025-04-30 10:49:21,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2025-04-30 10:49:21,849 INFO L79 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 24 [2025-04-30 10:49:21,849 INFO L85 Accepts]: Finished accepts. word is rejected. [2025-04-30 10:49:21,849 INFO L485 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2025-04-30 10:49:21,849 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 35 states have internal predecessors, (61), 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) [2025-04-30 10:49:21,849 INFO L278 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2025-04-30 10:49:21,849 INFO L284 IsEmpty]: Finished isEmpty. No accepting run. [2025-04-30 10:49:21,851 INFO L790 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 9 remaining) [2025-04-30 10:49:21,851 INFO L790 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 9 remaining) [2025-04-30 10:49:21,852 INFO L790 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 9 remaining) [2025-04-30 10:49:21,852 INFO L790 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 9 remaining) [2025-04-30 10:49:21,852 INFO L790 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 9 remaining) [2025-04-30 10:49:21,852 INFO L790 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 9 remaining) [2025-04-30 10:49:21,852 INFO L790 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 9 remaining) [2025-04-30 10:49:21,852 INFO L790 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 9 remaining) [2025-04-30 10:49:21,852 INFO L790 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK (0 of 9 remaining) [2025-04-30 10:49:21,858 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-04-30 10:49:22,056 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-30 10:49:22,058 INFO L422 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-30 10:49:22,060 INFO L171 ceAbstractionStarter]: Computing trace abstraction results [2025-04-30 10:49:22,063 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.04 10:49:22 BoogieIcfgContainer [2025-04-30 10:49:22,063 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-04-30 10:49:22,063 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2025-04-30 10:49:22,063 INFO L270 PluginConnector]: Initializing Witness Printer... [2025-04-30 10:49:22,064 INFO L274 PluginConnector]: Witness Printer initialized [2025-04-30 10:49:22,064 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.04 10:49:08" (3/4) ... [2025-04-30 10:49:22,065 INFO L146 WitnessPrinter]: Generating witness for correct program [2025-04-30 10:49:22,072 INFO L904 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2025-04-30 10:49:22,073 INFO L904 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2025-04-30 10:49:22,073 INFO L904 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2025-04-30 10:49:22,073 INFO L904 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2025-04-30 10:49:22,130 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2025-04-30 10:49:22,130 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.yml [2025-04-30 10:49:22,131 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2025-04-30 10:49:22,131 INFO L158 Benchmark]: Toolchain (without parser) took 14045.55ms. Allocated memory was 167.8MB in the beginning and 201.3MB in the end (delta: 33.6MB). Free memory was 131.9MB in the beginning and 96.2MB in the end (delta: 35.7MB). Peak memory consumption was 66.9MB. Max. memory is 16.1GB. [2025-04-30 10:49:22,131 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 201.3MB. Free memory is still 129.1MB. There was no memory consumed. Max. memory is 16.1GB. [2025-04-30 10:49:22,132 INFO L158 Benchmark]: CACSL2BoogieTranslator took 368.03ms. Allocated memory is still 167.8MB. Free memory was 131.5MB in the beginning and 112.5MB in the end (delta: 19.0MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2025-04-30 10:49:22,132 INFO L158 Benchmark]: Boogie Procedure Inliner took 33.01ms. Allocated memory is still 167.8MB. Free memory was 112.5MB in the beginning and 110.7MB in the end (delta: 1.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-04-30 10:49:22,132 INFO L158 Benchmark]: Boogie Preprocessor took 40.61ms. Allocated memory is still 167.8MB. Free memory was 110.7MB in the beginning and 109.0MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. [2025-04-30 10:49:22,133 INFO L158 Benchmark]: RCFGBuilder took 252.37ms. Allocated memory is still 167.8MB. Free memory was 109.0MB in the beginning and 95.9MB in the end (delta: 13.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-04-30 10:49:22,133 INFO L158 Benchmark]: TraceAbstraction took 13279.69ms. Allocated memory was 167.8MB in the beginning and 201.3MB in the end (delta: 33.6MB). Free memory was 95.5MB in the beginning and 102.6MB in the end (delta: -7.1MB). Peak memory consumption was 33.4MB. Max. memory is 16.1GB. [2025-04-30 10:49:22,133 INFO L158 Benchmark]: Witness Printer took 67.21ms. Allocated memory is still 201.3MB. Free memory was 102.6MB in the beginning and 96.2MB in the end (delta: 6.4MB). There was no memory consumed. Max. memory is 16.1GB. [2025-04-30 10:49:22,134 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 201.3MB. Free memory is still 129.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 368.03ms. Allocated memory is still 167.8MB. Free memory was 131.5MB in the beginning and 112.5MB in the end (delta: 19.0MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 33.01ms. Allocated memory is still 167.8MB. Free memory was 112.5MB in the beginning and 110.7MB in the end (delta: 1.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 40.61ms. Allocated memory is still 167.8MB. Free memory was 110.7MB in the beginning and 109.0MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 252.37ms. Allocated memory is still 167.8MB. Free memory was 109.0MB in the beginning and 95.9MB in the end (delta: 13.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 13279.69ms. Allocated memory was 167.8MB in the beginning and 201.3MB in the end (delta: 33.6MB). Free memory was 95.5MB in the beginning and 102.6MB in the end (delta: -7.1MB). Peak memory consumption was 33.4MB. Max. memory is 16.1GB. * Witness Printer took 67.21ms. Allocated memory is still 201.3MB. Free memory was 102.6MB in the beginning and 96.2MB in the end (delta: 6.4MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 560]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 27 locations, 30 edges, 9 error locations. Started 1 CEGAR loops. OverallTime: 13.2s, OverallIterations: 10, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 7.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 7 mSolverCounterUnknown, 195 SdHoareTripleChecker+Valid, 2.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 195 mSDsluCounter, 768 SdHoareTripleChecker+Invalid, 2.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 603 mSDsCounter, 46 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 920 IncrementalHoareTripleChecker+Invalid, 973 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 46 mSolverCounterUnsat, 165 mSDtfsCounter, 920 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 206 GetRequests, 60 SyntacticMatches, 5 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1161 ImplicationChecksByTransitivity, 6.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=39occurred in iteration=9, InterpolantAutomatonStates: 98, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 10 MinimizatonAttempts, 33 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 4.5s InterpolantComputationTime, 158 NumberOfCodeBlocks, 158 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 195 ConstructedInterpolants, 25 QuantifiedInterpolants, 2814 SizeOfPredicates, 15 NumberOfNonLiveVariables, 299 ConjunctsInSsa, 105 ConjunctsInUnsatCore, 16 InterpolantComputations, 7 PerfectInterpolantSequences, 8/79 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available, ConComCheckerStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 9 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2025-04-30 10:49:22,162 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE