./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/valid-memsafety.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/cstrcat-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a046e57d Calling Ultimate with: /root/.sdkman/candidates/java/current/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_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/cstrcat-alloca-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-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 32bit --witnessprinter.graph.data.programhash bfd8ca9d9dda86f57445168715d124831c95b647e7c1b1093bb129b0384cce9e --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-mul-div-a046e57-m [2024-10-13 10:28:25,958 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-13 10:28:26,035 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-13 10:28:26,040 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-13 10:28:26,042 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-13 10:28:26,066 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-13 10:28:26,066 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-13 10:28:26,067 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-13 10:28:26,067 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-13 10:28:26,070 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-13 10:28:26,070 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-13 10:28:26,071 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-13 10:28:26,071 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-13 10:28:26,071 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-13 10:28:26,071 INFO L153 SettingsManager]: * Use SBE=true [2024-10-13 10:28:26,072 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-13 10:28:26,072 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-13 10:28:26,072 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-13 10:28:26,072 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-13 10:28:26,072 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-13 10:28:26,072 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-13 10:28:26,074 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-13 10:28:26,074 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-13 10:28:26,075 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-13 10:28:26,075 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-13 10:28:26,075 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-13 10:28:26,075 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-13 10:28:26,075 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-13 10:28:26,076 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-13 10:28:26,076 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-13 10:28:26,076 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-13 10:28:26,076 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-13 10:28:26,076 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-13 10:28:26,076 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 10:28:26,077 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-13 10:28:26,077 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-13 10:28:26,077 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-13 10:28:26,077 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-13 10:28:26,077 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-13 10:28:26,077 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-13 10:28:26,077 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-13 10:28:26,079 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-13 10:28:26,079 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bfd8ca9d9dda86f57445168715d124831c95b647e7c1b1093bb129b0384cce9e [2024-10-13 10:28:26,300 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-13 10:28:26,323 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-13 10:28:26,326 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-13 10:28:26,327 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-13 10:28:26,327 INFO L274 PluginConnector]: CDTParser initialized [2024-10-13 10:28:26,328 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/cstrcat-alloca-2.i [2024-10-13 10:28:27,816 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-13 10:28:28,018 INFO L384 CDTParser]: Found 1 translation units. [2024-10-13 10:28:28,018 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/cstrcat-alloca-2.i [2024-10-13 10:28:28,033 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec19e966a/39f278cd6b4345ccbb5162cc8598ff9e/FLAG4b90e14d1 [2024-10-13 10:28:28,050 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec19e966a/39f278cd6b4345ccbb5162cc8598ff9e [2024-10-13 10:28:28,053 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-13 10:28:28,054 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-13 10:28:28,055 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-13 10:28:28,055 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-13 10:28:28,061 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-13 10:28:28,062 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:28:28" (1/1) ... [2024-10-13 10:28:28,063 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a3ba30c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:28:28, skipping insertion in model container [2024-10-13 10:28:28,063 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:28:28" (1/1) ... [2024-10-13 10:28:28,110 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-13 10:28:28,352 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 10:28:28,359 INFO L200 MainTranslator]: Completed pre-run [2024-10-13 10:28:28,392 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 10:28:28,413 INFO L204 MainTranslator]: Completed translation [2024-10-13 10:28:28,413 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:28:28 WrapperNode [2024-10-13 10:28:28,413 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-13 10:28:28,414 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-13 10:28:28,414 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-13 10:28:28,415 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-13 10:28:28,420 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:28:28" (1/1) ... [2024-10-13 10:28:28,428 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:28:28" (1/1) ... [2024-10-13 10:28:28,447 INFO L138 Inliner]: procedures = 117, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 99 [2024-10-13 10:28:28,447 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-13 10:28:28,448 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-13 10:28:28,448 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-13 10:28:28,448 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-13 10:28:28,458 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:28:28" (1/1) ... [2024-10-13 10:28:28,459 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:28:28" (1/1) ... [2024-10-13 10:28:28,461 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:28:28" (1/1) ... [2024-10-13 10:28:28,476 INFO L175 MemorySlicer]: Split 7 memory accesses to 2 slices as follows [4, 3]. 57 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0, 0]. The 5 writes are split as follows [3, 2]. [2024-10-13 10:28:28,477 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:28:28" (1/1) ... [2024-10-13 10:28:28,477 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:28:28" (1/1) ... [2024-10-13 10:28:28,484 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:28:28" (1/1) ... [2024-10-13 10:28:28,487 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:28:28" (1/1) ... [2024-10-13 10:28:28,488 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:28:28" (1/1) ... [2024-10-13 10:28:28,489 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:28:28" (1/1) ... [2024-10-13 10:28:28,491 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-13 10:28:28,495 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-13 10:28:28,496 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-13 10:28:28,496 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-13 10:28:28,496 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:28:28" (1/1) ... [2024-10-13 10:28:28,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 10:28:28,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 10:28:28,528 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) [2024-10-13 10:28:28,530 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 [2024-10-13 10:28:28,572 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-13 10:28:28,573 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-13 10:28:28,573 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-13 10:28:28,573 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-13 10:28:28,573 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-13 10:28:28,573 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-13 10:28:28,573 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-13 10:28:28,574 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-13 10:28:28,672 INFO L238 CfgBuilder]: Building ICFG [2024-10-13 10:28:28,674 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-13 10:28:28,815 INFO L? ?]: Removed 59 outVars from TransFormulas that were not future-live. [2024-10-13 10:28:28,815 INFO L287 CfgBuilder]: Performing block encoding [2024-10-13 10:28:28,855 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-13 10:28:28,857 INFO L314 CfgBuilder]: Removed 4 assume(true) statements. [2024-10-13 10:28:28,857 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:28:28 BoogieIcfgContainer [2024-10-13 10:28:28,857 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-13 10:28:28,860 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-13 10:28:28,860 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-13 10:28:28,863 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-13 10:28:28,863 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 10:28:28" (1/3) ... [2024-10-13 10:28:28,863 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53347e84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:28:28, skipping insertion in model container [2024-10-13 10:28:28,864 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:28:28" (2/3) ... [2024-10-13 10:28:28,864 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53347e84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:28:28, skipping insertion in model container [2024-10-13 10:28:28,865 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:28:28" (3/3) ... [2024-10-13 10:28:28,866 INFO L112 eAbstractionObserver]: Analyzing ICFG cstrcat-alloca-2.i [2024-10-13 10:28:28,879 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-13 10:28:28,880 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2024-10-13 10:28:28,920 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-13 10:28:28,925 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5cde2bf0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-13 10:28:28,926 INFO L334 AbstractCegarLoop]: Starting to check reachability of 15 error locations. [2024-10-13 10:28:28,930 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 36 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:28:28,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-10-13 10:28:28,935 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:28:28,936 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-13 10:28:28,937 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-10-13 10:28:28,941 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:28:28,942 INFO L85 PathProgramCache]: Analyzing trace with hash -138777939, now seen corresponding path program 1 times [2024-10-13 10:28:28,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:28:28,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135617232] [2024-10-13 10:28:28,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:28:28,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:28:29,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:28:29,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:28:29,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:28:29,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135617232] [2024-10-13 10:28:29,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135617232] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 10:28:29,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 10:28:29,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-13 10:28:29,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066433451] [2024-10-13 10:28:29,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 10:28:29,202 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-13 10:28:29,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:28:29,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-13 10:28:29,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-13 10:28:29,225 INFO L87 Difference]: Start difference. First operand has 37 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 36 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:28:29,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:28:29,347 INFO L93 Difference]: Finished difference Result 62 states and 77 transitions. [2024-10-13 10:28:29,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-13 10:28:29,350 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-10-13 10:28:29,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:28:29,356 INFO L225 Difference]: With dead ends: 62 [2024-10-13 10:28:29,357 INFO L226 Difference]: Without dead ends: 61 [2024-10-13 10:28:29,359 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-10-13 10:28:29,361 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 65 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 10:28:29,362 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 109 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 10:28:29,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-10-13 10:28:29,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 39. [2024-10-13 10:28:29,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 24 states have (on average 2.0) internal successors, (48), 38 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:28:29,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions. [2024-10-13 10:28:29,390 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 48 transitions. Word has length 6 [2024-10-13 10:28:29,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:28:29,390 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 48 transitions. [2024-10-13 10:28:29,390 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:28:29,391 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 48 transitions. [2024-10-13 10:28:29,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-10-13 10:28:29,391 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:28:29,392 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-13 10:28:29,392 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-13 10:28:29,392 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-10-13 10:28:29,393 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:28:29,393 INFO L85 PathProgramCache]: Analyzing trace with hash -138776017, now seen corresponding path program 1 times [2024-10-13 10:28:29,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:28:29,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958528785] [2024-10-13 10:28:29,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:28:29,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:28:29,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:28:29,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:28:29,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:28:29,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958528785] [2024-10-13 10:28:29,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958528785] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 10:28:29,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 10:28:29,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-13 10:28:29,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699562097] [2024-10-13 10:28:29,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 10:28:29,437 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 10:28:29,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:28:29,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 10:28:29,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 10:28:29,438 INFO L87 Difference]: Start difference. First operand 39 states and 48 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:28:29,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:28:29,481 INFO L93 Difference]: Finished difference Result 40 states and 48 transitions. [2024-10-13 10:28:29,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 10:28:29,481 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-10-13 10:28:29,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:28:29,481 INFO L225 Difference]: With dead ends: 40 [2024-10-13 10:28:29,482 INFO L226 Difference]: Without dead ends: 39 [2024-10-13 10:28:29,482 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 10:28:29,483 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 3 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 10:28:29,483 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 55 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 10:28:29,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-10-13 10:28:29,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2024-10-13 10:28:29,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 21 states have (on average 2.0) internal successors, (42), 35 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) [2024-10-13 10:28:29,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2024-10-13 10:28:29,490 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 6 [2024-10-13 10:28:29,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:28:29,491 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2024-10-13 10:28:29,491 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:28:29,491 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2024-10-13 10:28:29,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-10-13 10:28:29,491 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:28:29,492 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:28:29,492 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-13 10:28:29,492 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-10-13 10:28:29,493 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:28:29,493 INFO L85 PathProgramCache]: Analyzing trace with hash -7149119, now seen corresponding path program 1 times [2024-10-13 10:28:29,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:28:29,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64000493] [2024-10-13 10:28:29,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:28:29,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:28:29,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:28:29,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:28:29,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:28:29,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64000493] [2024-10-13 10:28:29,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64000493] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 10:28:29,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 10:28:29,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-13 10:28:29,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845084996] [2024-10-13 10:28:29,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 10:28:29,559 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 10:28:29,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:28:29,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 10:28:29,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-13 10:28:29,560 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:28:29,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:28:29,592 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2024-10-13 10:28:29,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 10:28:29,593 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-10-13 10:28:29,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:28:29,593 INFO L225 Difference]: With dead ends: 48 [2024-10-13 10:28:29,594 INFO L226 Difference]: Without dead ends: 48 [2024-10-13 10:28:29,594 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-13 10:28:29,595 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 11 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 10:28:29,595 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 73 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 10:28:29,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-10-13 10:28:29,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 40. [2024-10-13 10:28:29,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 25 states have (on average 1.92) internal successors, (48), 39 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:28:29,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2024-10-13 10:28:29,598 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 7 [2024-10-13 10:28:29,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:28:29,598 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2024-10-13 10:28:29,598 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:28:29,599 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2024-10-13 10:28:29,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-10-13 10:28:29,599 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:28:29,599 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:28:29,599 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-13 10:28:29,599 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-10-13 10:28:29,600 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:28:29,600 INFO L85 PathProgramCache]: Analyzing trace with hash 50109183, now seen corresponding path program 1 times [2024-10-13 10:28:29,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:28:29,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992332824] [2024-10-13 10:28:29,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:28:29,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:28:29,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:28:29,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:28:29,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:28:29,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992332824] [2024-10-13 10:28:29,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992332824] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 10:28:29,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 10:28:29,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-13 10:28:29,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123706618] [2024-10-13 10:28:29,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 10:28:29,688 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-13 10:28:29,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:28:29,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-13 10:28:29,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-13 10:28:29,689 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 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) [2024-10-13 10:28:29,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:28:29,764 INFO L93 Difference]: Finished difference Result 51 states and 62 transitions. [2024-10-13 10:28:29,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-13 10:28:29,765 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 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 [2024-10-13 10:28:29,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:28:29,766 INFO L225 Difference]: With dead ends: 51 [2024-10-13 10:28:29,766 INFO L226 Difference]: Without dead ends: 51 [2024-10-13 10:28:29,767 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-10-13 10:28:29,768 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 16 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 10:28:29,768 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 120 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 10:28:29,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-10-13 10:28:29,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 40. [2024-10-13 10:28:29,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 25 states have (on average 1.92) internal successors, (48), 39 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:28:29,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2024-10-13 10:28:29,774 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 7 [2024-10-13 10:28:29,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:28:29,775 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2024-10-13 10:28:29,775 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 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) [2024-10-13 10:28:29,775 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2024-10-13 10:28:29,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-10-13 10:28:29,775 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:28:29,775 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:28:29,775 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-13 10:28:29,776 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-10-13 10:28:29,776 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:28:29,776 INFO L85 PathProgramCache]: Analyzing trace with hash 51956225, now seen corresponding path program 1 times [2024-10-13 10:28:29,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:28:29,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047201680] [2024-10-13 10:28:29,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:28:29,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:28:29,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:28:29,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:28:29,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:28:29,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047201680] [2024-10-13 10:28:29,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047201680] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 10:28:29,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 10:28:29,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 10:28:29,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899257869] [2024-10-13 10:28:29,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 10:28:29,953 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 10:28:29,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:28:29,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 10:28:29,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 10:28:29,954 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 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) [2024-10-13 10:28:29,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:28:29,979 INFO L93 Difference]: Finished difference Result 38 states and 46 transitions. [2024-10-13 10:28:29,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 10:28:29,979 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 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 [2024-10-13 10:28:29,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:28:29,980 INFO L225 Difference]: With dead ends: 38 [2024-10-13 10:28:29,980 INFO L226 Difference]: Without dead ends: 38 [2024-10-13 10:28:29,980 INFO L431 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 [2024-10-13 10:28:29,982 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 12 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 10:28:29,982 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 44 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 10:28:29,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-10-13 10:28:29,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2024-10-13 10:28:29,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 25 states have (on average 1.84) internal successors, (46), 37 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:28:29,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2024-10-13 10:28:29,987 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 7 [2024-10-13 10:28:29,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:28:29,989 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2024-10-13 10:28:29,990 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 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) [2024-10-13 10:28:29,990 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2024-10-13 10:28:29,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-10-13 10:28:29,990 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:28:29,990 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:28:29,990 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-13 10:28:29,991 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-10-13 10:28:29,991 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:28:29,991 INFO L85 PathProgramCache]: Analyzing trace with hash 51956226, now seen corresponding path program 1 times [2024-10-13 10:28:29,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:28:29,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618624650] [2024-10-13 10:28:29,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:28:29,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:28:30,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:28:30,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:28:30,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:28:30,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618624650] [2024-10-13 10:28:30,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618624650] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 10:28:30,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 10:28:30,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-13 10:28:30,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395250198] [2024-10-13 10:28:30,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 10:28:30,214 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-13 10:28:30,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:28:30,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-13 10:28:30,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-13 10:28:30,219 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 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) [2024-10-13 10:28:30,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:28:30,387 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2024-10-13 10:28:30,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-13 10:28:30,387 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 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 [2024-10-13 10:28:30,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:28:30,389 INFO L225 Difference]: With dead ends: 41 [2024-10-13 10:28:30,389 INFO L226 Difference]: Without dead ends: 41 [2024-10-13 10:28:30,389 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-10-13 10:28:30,389 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 28 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 10:28:30,390 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 78 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 10:28:30,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-10-13 10:28:30,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2024-10-13 10:28:30,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 39 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:28:30,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2024-10-13 10:28:30,406 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 7 [2024-10-13 10:28:30,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:28:30,407 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2024-10-13 10:28:30,407 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 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) [2024-10-13 10:28:30,407 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2024-10-13 10:28:30,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-10-13 10:28:30,407 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:28:30,407 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:28:30,407 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-13 10:28:30,408 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-10-13 10:28:30,408 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:28:30,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1719580973, now seen corresponding path program 1 times [2024-10-13 10:28:30,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:28:30,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726937703] [2024-10-13 10:28:30,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:28:30,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:28:30,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:28:30,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:28:30,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:28:30,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726937703] [2024-10-13 10:28:30,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726937703] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 10:28:30,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 10:28:30,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-13 10:28:30,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697681125] [2024-10-13 10:28:30,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 10:28:30,651 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-13 10:28:30,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:28:30,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-13 10:28:30,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-13 10:28:30,652 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 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) [2024-10-13 10:28:30,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:28:30,725 INFO L93 Difference]: Finished difference Result 47 states and 59 transitions. [2024-10-13 10:28:30,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-13 10:28:30,726 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-10-13 10:28:30,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:28:30,726 INFO L225 Difference]: With dead ends: 47 [2024-10-13 10:28:30,726 INFO L226 Difference]: Without dead ends: 47 [2024-10-13 10:28:30,726 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-10-13 10:28:30,727 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 30 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 10:28:30,733 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 70 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 10:28:30,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-10-13 10:28:30,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 38. [2024-10-13 10:28:30,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 37 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:28:30,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2024-10-13 10:28:30,736 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 9 [2024-10-13 10:28:30,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:28:30,737 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2024-10-13 10:28:30,737 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 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) [2024-10-13 10:28:30,737 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2024-10-13 10:28:30,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-10-13 10:28:30,740 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:28:30,740 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:28:30,741 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-13 10:28:30,741 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-10-13 10:28:30,741 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:28:30,741 INFO L85 PathProgramCache]: Analyzing trace with hash 1719580974, now seen corresponding path program 1 times [2024-10-13 10:28:30,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:28:30,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600081812] [2024-10-13 10:28:30,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:28:30,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:28:30,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:28:30,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:28:30,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:28:30,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600081812] [2024-10-13 10:28:30,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600081812] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 10:28:30,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 10:28:30,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-13 10:28:30,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714952348] [2024-10-13 10:28:30,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 10:28:30,987 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-13 10:28:30,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:28:30,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-13 10:28:30,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-13 10:28:30,987 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 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) [2024-10-13 10:28:31,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:28:31,121 INFO L93 Difference]: Finished difference Result 47 states and 58 transitions. [2024-10-13 10:28:31,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-13 10:28:31,121 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-10-13 10:28:31,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:28:31,122 INFO L225 Difference]: With dead ends: 47 [2024-10-13 10:28:31,123 INFO L226 Difference]: Without dead ends: 47 [2024-10-13 10:28:31,127 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-10-13 10:28:31,128 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 14 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 10:28:31,128 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 94 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 10:28:31,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-10-13 10:28:31,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2024-10-13 10:28:31,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 33 states have (on average 1.6363636363636365) internal successors, (54), 43 states have internal predecessors, (54), 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) [2024-10-13 10:28:31,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 54 transitions. [2024-10-13 10:28:31,133 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 54 transitions. Word has length 9 [2024-10-13 10:28:31,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:28:31,133 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 54 transitions. [2024-10-13 10:28:31,133 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 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) [2024-10-13 10:28:31,133 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 54 transitions. [2024-10-13 10:28:31,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-10-13 10:28:31,137 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:28:31,137 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:28:31,137 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-13 10:28:31,138 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-10-13 10:28:31,138 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:28:31,138 INFO L85 PathProgramCache]: Analyzing trace with hash -800378960, now seen corresponding path program 1 times [2024-10-13 10:28:31,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:28:31,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13924516] [2024-10-13 10:28:31,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:28:31,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:28:31,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:28:31,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:28:31,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:28:31,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13924516] [2024-10-13 10:28:31,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13924516] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 10:28:31,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 10:28:31,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-13 10:28:31,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858270779] [2024-10-13 10:28:31,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 10:28:31,343 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-13 10:28:31,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:28:31,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-13 10:28:31,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-10-13 10:28:31,348 INFO L87 Difference]: Start difference. First operand 44 states and 54 transitions. Second operand has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 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) [2024-10-13 10:28:31,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:28:31,413 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2024-10-13 10:28:31,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-13 10:28:31,417 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-10-13 10:28:31,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:28:31,418 INFO L225 Difference]: With dead ends: 46 [2024-10-13 10:28:31,418 INFO L226 Difference]: Without dead ends: 46 [2024-10-13 10:28:31,418 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-10-13 10:28:31,419 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 13 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 10:28:31,419 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 76 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 10:28:31,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-10-13 10:28:31,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2024-10-13 10:28:31,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 39 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:28:31,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2024-10-13 10:28:31,422 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 9 [2024-10-13 10:28:31,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:28:31,422 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2024-10-13 10:28:31,422 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 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) [2024-10-13 10:28:31,426 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2024-10-13 10:28:31,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-10-13 10:28:31,427 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:28:31,427 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:28:31,427 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-13 10:28:31,427 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-10-13 10:28:31,427 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:28:31,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1609600271, now seen corresponding path program 1 times [2024-10-13 10:28:31,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:28:31,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31592159] [2024-10-13 10:28:31,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:28:31,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:28:31,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:28:31,678 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:28:31,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:28:31,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31592159] [2024-10-13 10:28:31,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31592159] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 10:28:31,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110273148] [2024-10-13 10:28:31,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:28:31,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:28:31,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 10:28:31,680 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) [2024-10-13 10:28:31,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-13 10:28:31,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:28:31,731 INFO L255 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-13 10:28:31,735 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 10:28:31,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-13 10:28:31,807 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2024-10-13 10:28:31,813 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-10-13 10:28:31,934 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:28:31,935 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 10:28:32,054 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-13 10:28:32,090 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:28:32,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110273148] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 10:28:32,091 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 10:28:32,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 13 [2024-10-13 10:28:32,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093674392] [2024-10-13 10:28:32,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 10:28:32,092 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-13 10:28:32,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:28:32,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-13 10:28:32,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2024-10-13 10:28:32,093 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:28:32,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:28:32,250 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2024-10-13 10:28:32,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-13 10:28:32,251 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-10-13 10:28:32,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:28:32,251 INFO L225 Difference]: With dead ends: 40 [2024-10-13 10:28:32,251 INFO L226 Difference]: Without dead ends: 40 [2024-10-13 10:28:32,252 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2024-10-13 10:28:32,252 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 32 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 10:28:32,253 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 134 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 10:28:32,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-10-13 10:28:32,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2024-10-13 10:28:32,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 36 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:28:32,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2024-10-13 10:28:32,258 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 9 [2024-10-13 10:28:32,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:28:32,258 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2024-10-13 10:28:32,258 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:28:32,258 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2024-10-13 10:28:32,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-10-13 10:28:32,259 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:28:32,259 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:28:32,274 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-13 10:28:32,459 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-10-13 10:28:32,460 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-10-13 10:28:32,460 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:28:32,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1045031729, now seen corresponding path program 1 times [2024-10-13 10:28:32,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:28:32,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671872919] [2024-10-13 10:28:32,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:28:32,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:28:32,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:28:32,531 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:28:32,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:28:32,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671872919] [2024-10-13 10:28:32,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671872919] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 10:28:32,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126919566] [2024-10-13 10:28:32,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:28:32,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:28:32,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 10:28:32,534 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) [2024-10-13 10:28:32,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-13 10:28:32,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:28:32,588 INFO L255 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-13 10:28:32,589 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 10:28:32,621 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:28:32,621 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-13 10:28:32,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126919566] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 10:28:32,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-13 10:28:32,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2024-10-13 10:28:32,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315772628] [2024-10-13 10:28:32,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 10:28:32,623 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-13 10:28:32,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:28:32,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-13 10:28:32,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-10-13 10:28:32,624 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 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) [2024-10-13 10:28:32,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:28:32,641 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2024-10-13 10:28:32,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-13 10:28:32,641 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 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 [2024-10-13 10:28:32,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:28:32,642 INFO L225 Difference]: With dead ends: 44 [2024-10-13 10:28:32,642 INFO L226 Difference]: Without dead ends: 44 [2024-10-13 10:28:32,642 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-10-13 10:28:32,642 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 1 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 10:28:32,643 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 59 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 10:28:32,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-10-13 10:28:32,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2024-10-13 10:28:32,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 34 states have (on average 1.5588235294117647) internal successors, (53), 43 states have internal predecessors, (53), 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) [2024-10-13 10:28:32,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2024-10-13 10:28:32,647 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 11 [2024-10-13 10:28:32,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:28:32,647 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2024-10-13 10:28:32,648 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 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) [2024-10-13 10:28:32,648 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2024-10-13 10:28:32,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-10-13 10:28:32,649 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:28:32,649 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:28:32,663 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-13 10:28:32,850 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-10-13 10:28:32,851 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-10-13 10:28:32,851 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:28:32,851 INFO L85 PathProgramCache]: Analyzing trace with hash -364973359, now seen corresponding path program 1 times [2024-10-13 10:28:32,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:28:32,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649595532] [2024-10-13 10:28:32,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:28:32,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:28:32,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:28:33,122 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:28:33,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:28:33,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649595532] [2024-10-13 10:28:33,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649595532] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 10:28:33,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397828631] [2024-10-13 10:28:33,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:28:33,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:28:33,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 10:28:33,128 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) [2024-10-13 10:28:33,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-13 10:28:33,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:28:33,180 INFO L255 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-13 10:28:33,181 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 10:28:33,215 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2024-10-13 10:28:33,226 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-13 10:28:33,455 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:28:33,455 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 10:28:33,737 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:28:33,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397828631] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 10:28:33,737 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 10:28:33,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2024-10-13 10:28:33,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689749135] [2024-10-13 10:28:33,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 10:28:33,738 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-13 10:28:33,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:28:33,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-13 10:28:33,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2024-10-13 10:28:33,740 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand has 17 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:28:34,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:28:34,138 INFO L93 Difference]: Finished difference Result 44 states and 54 transitions. [2024-10-13 10:28:34,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-13 10:28:34,138 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-10-13 10:28:34,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:28:34,139 INFO L225 Difference]: With dead ends: 44 [2024-10-13 10:28:34,139 INFO L226 Difference]: Without dead ends: 44 [2024-10-13 10:28:34,139 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=150, Invalid=312, Unknown=0, NotChecked=0, Total=462 [2024-10-13 10:28:34,140 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 9 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-13 10:28:34,140 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 183 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-13 10:28:34,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-10-13 10:28:34,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2024-10-13 10:28:34,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 33 states have (on average 1.5454545454545454) internal successors, (51), 41 states have internal predecessors, (51), 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) [2024-10-13 10:28:34,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 51 transitions. [2024-10-13 10:28:34,146 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 51 transitions. Word has length 11 [2024-10-13 10:28:34,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:28:34,146 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 51 transitions. [2024-10-13 10:28:34,146 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:28:34,146 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 51 transitions. [2024-10-13 10:28:34,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-10-13 10:28:34,146 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:28:34,146 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:28:34,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-13 10:28:34,347 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:28:34,348 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-10-13 10:28:34,348 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:28:34,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1963753128, now seen corresponding path program 1 times [2024-10-13 10:28:34,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:28:34,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283384476] [2024-10-13 10:28:34,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:28:34,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:28:34,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:28:34,466 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 10:28:34,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:28:34,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283384476] [2024-10-13 10:28:34,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283384476] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 10:28:34,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 10:28:34,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 10:28:34,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099954564] [2024-10-13 10:28:34,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 10:28:34,468 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 10:28:34,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:28:34,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 10:28:34,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-13 10:28:34,468 INFO L87 Difference]: Start difference. First operand 42 states and 51 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 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) [2024-10-13 10:28:34,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:28:34,501 INFO L93 Difference]: Finished difference Result 55 states and 66 transitions. [2024-10-13 10:28:34,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 10:28:34,502 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 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 [2024-10-13 10:28:34,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:28:34,502 INFO L225 Difference]: With dead ends: 55 [2024-10-13 10:28:34,502 INFO L226 Difference]: Without dead ends: 55 [2024-10-13 10:28:34,502 INFO L431 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 [2024-10-13 10:28:34,503 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 2 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 10:28:34,503 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 56 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 10:28:34,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-10-13 10:28:34,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2024-10-13 10:28:34,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 46 states have (on average 1.434782608695652) internal successors, (66), 54 states have internal predecessors, (66), 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) [2024-10-13 10:28:34,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 66 transitions. [2024-10-13 10:28:34,505 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 66 transitions. Word has length 12 [2024-10-13 10:28:34,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:28:34,505 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 66 transitions. [2024-10-13 10:28:34,505 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 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) [2024-10-13 10:28:34,506 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 66 transitions. [2024-10-13 10:28:34,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-10-13 10:28:34,506 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:28:34,506 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:28:34,506 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-10-13 10:28:34,506 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-10-13 10:28:34,507 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:28:34,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1630149590, now seen corresponding path program 1 times [2024-10-13 10:28:34,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:28:34,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374351132] [2024-10-13 10:28:34,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:28:34,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:28:34,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:28:34,632 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 10:28:34,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:28:34,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374351132] [2024-10-13 10:28:34,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374351132] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 10:28:34,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 10:28:34,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 10:28:34,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999861991] [2024-10-13 10:28:34,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 10:28:34,633 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-13 10:28:34,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:28:34,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-13 10:28:34,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-10-13 10:28:34,634 INFO L87 Difference]: Start difference. First operand 55 states and 66 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 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) [2024-10-13 10:28:34,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:28:34,671 INFO L93 Difference]: Finished difference Result 54 states and 65 transitions. [2024-10-13 10:28:34,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-13 10:28:34,672 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 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 [2024-10-13 10:28:34,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:28:34,672 INFO L225 Difference]: With dead ends: 54 [2024-10-13 10:28:34,673 INFO L226 Difference]: Without dead ends: 54 [2024-10-13 10:28:34,673 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-10-13 10:28:34,673 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 10 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 10:28:34,673 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 44 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 10:28:34,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-10-13 10:28:34,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 41. [2024-10-13 10:28:34,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 33 states have (on average 1.5151515151515151) internal successors, (50), 40 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:28:34,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 50 transitions. [2024-10-13 10:28:34,675 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 50 transitions. Word has length 12 [2024-10-13 10:28:34,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:28:34,676 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 50 transitions. [2024-10-13 10:28:34,676 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 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) [2024-10-13 10:28:34,676 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 50 transitions. [2024-10-13 10:28:34,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-10-13 10:28:34,676 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:28:34,676 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:28:34,676 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-10-13 10:28:34,677 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-10-13 10:28:34,677 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:28:34,677 INFO L85 PathProgramCache]: Analyzing trace with hash 746804829, now seen corresponding path program 1 times [2024-10-13 10:28:34,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:28:34,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313536618] [2024-10-13 10:28:34,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:28:34,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:28:34,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:28:34,749 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:28:34,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:28:34,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313536618] [2024-10-13 10:28:34,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313536618] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 10:28:34,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036749074] [2024-10-13 10:28:34,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:28:34,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:28:34,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 10:28:34,751 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 10:28:34,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-13 10:28:34,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:28:34,805 INFO L255 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-13 10:28:34,806 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 10:28:34,906 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:28:34,906 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 10:28:34,944 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-10-13 10:28:35,009 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:28:35,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036749074] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 10:28:35,010 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 10:28:35,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-10-13 10:28:35,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587519507] [2024-10-13 10:28:35,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 10:28:35,010 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-13 10:28:35,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:28:35,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-13 10:28:35,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2024-10-13 10:28:35,011 INFO L87 Difference]: Start difference. First operand 41 states and 50 transitions. Second operand has 12 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 12 states have internal predecessors, (31), 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) [2024-10-13 10:28:35,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:28:35,135 INFO L93 Difference]: Finished difference Result 60 states and 71 transitions. [2024-10-13 10:28:35,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-13 10:28:35,135 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 12 states have internal predecessors, (31), 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 13 [2024-10-13 10:28:35,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:28:35,136 INFO L225 Difference]: With dead ends: 60 [2024-10-13 10:28:35,136 INFO L226 Difference]: Without dead ends: 60 [2024-10-13 10:28:35,136 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2024-10-13 10:28:35,136 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 17 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 10:28:35,136 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 140 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 10:28:35,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-10-13 10:28:35,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2024-10-13 10:28:35,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 51 states have (on average 1.3725490196078431) internal successors, (70), 58 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:28:35,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 70 transitions. [2024-10-13 10:28:35,139 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 70 transitions. Word has length 13 [2024-10-13 10:28:35,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:28:35,139 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 70 transitions. [2024-10-13 10:28:35,139 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 12 states have internal predecessors, (31), 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) [2024-10-13 10:28:35,139 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 70 transitions. [2024-10-13 10:28:35,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-10-13 10:28:35,139 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:28:35,140 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:28:35,152 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-13 10:28:35,343 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-10-13 10:28:35,344 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-10-13 10:28:35,344 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:28:35,344 INFO L85 PathProgramCache]: Analyzing trace with hash 353777819, now seen corresponding path program 1 times [2024-10-13 10:28:35,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:28:35,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867732382] [2024-10-13 10:28:35,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:28:35,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:28:35,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:28:35,464 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:28:35,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:28:35,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867732382] [2024-10-13 10:28:35,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867732382] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 10:28:35,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334083568] [2024-10-13 10:28:35,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:28:35,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:28:35,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 10:28:35,467 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 10:28:35,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-13 10:28:35,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:28:35,518 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-13 10:28:35,519 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 10:28:35,600 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:28:35,600 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 10:28:35,639 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-10-13 10:28:35,725 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:28:35,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334083568] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 10:28:35,725 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 10:28:35,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2024-10-13 10:28:35,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756128505] [2024-10-13 10:28:35,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 10:28:35,726 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-13 10:28:35,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:28:35,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-13 10:28:35,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2024-10-13 10:28:35,727 INFO L87 Difference]: Start difference. First operand 59 states and 70 transitions. Second operand has 17 states, 16 states have (on average 2.125) internal successors, (34), 17 states have internal predecessors, (34), 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) [2024-10-13 10:28:35,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:28:35,936 INFO L93 Difference]: Finished difference Result 63 states and 74 transitions. [2024-10-13 10:28:35,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-13 10:28:35,936 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.125) internal successors, (34), 17 states have internal predecessors, (34), 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 13 [2024-10-13 10:28:35,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:28:35,937 INFO L225 Difference]: With dead ends: 63 [2024-10-13 10:28:35,937 INFO L226 Difference]: Without dead ends: 63 [2024-10-13 10:28:35,938 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=188, Invalid=462, Unknown=0, NotChecked=0, Total=650 [2024-10-13 10:28:35,938 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 57 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 10:28:35,938 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 209 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 10:28:35,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-10-13 10:28:35,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 53. [2024-10-13 10:28:35,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 45 states have (on average 1.4222222222222223) internal successors, (64), 52 states have internal predecessors, (64), 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) [2024-10-13 10:28:35,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 64 transitions. [2024-10-13 10:28:35,944 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 64 transitions. Word has length 13 [2024-10-13 10:28:35,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:28:35,944 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 64 transitions. [2024-10-13 10:28:35,944 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.125) internal successors, (34), 17 states have internal predecessors, (34), 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) [2024-10-13 10:28:35,944 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 64 transitions. [2024-10-13 10:28:35,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-10-13 10:28:35,944 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:28:35,944 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:28:35,962 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-13 10:28:36,145 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-10-13 10:28:36,146 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-10-13 10:28:36,146 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:28:36,147 INFO L85 PathProgramCache]: Analyzing trace with hash 1054842397, now seen corresponding path program 1 times [2024-10-13 10:28:36,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:28:36,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772693318] [2024-10-13 10:28:36,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:28:36,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:28:36,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:28:36,223 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:28:36,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:28:36,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772693318] [2024-10-13 10:28:36,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772693318] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 10:28:36,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834451467] [2024-10-13 10:28:36,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:28:36,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:28:36,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 10:28:36,226 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 10:28:36,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-13 10:28:36,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:28:36,282 INFO L255 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-13 10:28:36,283 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 10:28:36,367 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:28:36,368 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-13 10:28:36,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834451467] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 10:28:36,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-13 10:28:36,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 9 [2024-10-13 10:28:36,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571902333] [2024-10-13 10:28:36,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 10:28:36,368 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-13 10:28:36,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:28:36,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-13 10:28:36,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-10-13 10:28:36,369 INFO L87 Difference]: Start difference. First operand 53 states and 64 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 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) [2024-10-13 10:28:36,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:28:36,449 INFO L93 Difference]: Finished difference Result 54 states and 65 transitions. [2024-10-13 10:28:36,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-13 10:28:36,450 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 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 13 [2024-10-13 10:28:36,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:28:36,450 INFO L225 Difference]: With dead ends: 54 [2024-10-13 10:28:36,450 INFO L226 Difference]: Without dead ends: 54 [2024-10-13 10:28:36,451 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2024-10-13 10:28:36,451 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 23 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 10:28:36,451 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 83 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 10:28:36,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-10-13 10:28:36,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 40. [2024-10-13 10:28:36,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 33 states have (on average 1.4848484848484849) internal successors, (49), 39 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:28:36,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2024-10-13 10:28:36,453 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 13 [2024-10-13 10:28:36,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:28:36,453 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2024-10-13 10:28:36,453 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 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) [2024-10-13 10:28:36,453 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2024-10-13 10:28:36,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-10-13 10:28:36,455 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:28:36,455 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:28:36,468 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-13 10:28:36,656 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-10-13 10:28:36,656 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-10-13 10:28:36,657 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:28:36,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1676114719, now seen corresponding path program 1 times [2024-10-13 10:28:36,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:28:36,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966942198] [2024-10-13 10:28:36,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:28:36,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:28:36,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:28:36,702 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:28:36,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:28:36,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966942198] [2024-10-13 10:28:36,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966942198] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 10:28:36,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 10:28:36,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 10:28:36,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992443870] [2024-10-13 10:28:36,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 10:28:36,702 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 10:28:36,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:28:36,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 10:28:36,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-13 10:28:36,703 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 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) [2024-10-13 10:28:36,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:28:36,749 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2024-10-13 10:28:36,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 10:28:36,750 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 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 14 [2024-10-13 10:28:36,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:28:36,750 INFO L225 Difference]: With dead ends: 39 [2024-10-13 10:28:36,750 INFO L226 Difference]: Without dead ends: 39 [2024-10-13 10:28:36,750 INFO L431 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 [2024-10-13 10:28:36,751 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 15 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 10:28:36,751 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 42 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 10:28:36,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-10-13 10:28:36,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2024-10-13 10:28:36,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 33 states have (on average 1.4545454545454546) internal successors, (48), 38 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:28:36,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions. [2024-10-13 10:28:36,752 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 48 transitions. Word has length 14 [2024-10-13 10:28:36,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:28:36,753 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 48 transitions. [2024-10-13 10:28:36,753 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 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) [2024-10-13 10:28:36,753 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 48 transitions. [2024-10-13 10:28:36,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-10-13 10:28:36,753 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:28:36,753 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:28:36,753 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-10-13 10:28:36,754 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-10-13 10:28:36,754 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:28:36,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1676114720, now seen corresponding path program 1 times [2024-10-13 10:28:36,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:28:36,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068951187] [2024-10-13 10:28:36,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:28:36,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:28:36,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:28:36,812 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:28:36,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:28:36,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068951187] [2024-10-13 10:28:36,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068951187] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 10:28:36,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342264472] [2024-10-13 10:28:36,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:28:36,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:28:36,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 10:28:36,814 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 10:28:36,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-13 10:28:36,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:28:36,870 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-13 10:28:36,872 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 10:28:36,877 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-13 10:28:36,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:28:36,913 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 10:28:36,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:28:36,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342264472] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-13 10:28:36,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-10-13 10:28:36,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 11 [2024-10-13 10:28:36,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101365776] [2024-10-13 10:28:36,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 10:28:36,962 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-13 10:28:36,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:28:36,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-13 10:28:36,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2024-10-13 10:28:36,963 INFO L87 Difference]: Start difference. First operand 39 states and 48 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 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) [2024-10-13 10:28:37,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:28:37,006 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2024-10-13 10:28:37,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-13 10:28:37,006 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 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 14 [2024-10-13 10:28:37,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:28:37,006 INFO L225 Difference]: With dead ends: 42 [2024-10-13 10:28:37,006 INFO L226 Difference]: Without dead ends: 42 [2024-10-13 10:28:37,007 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2024-10-13 10:28:37,007 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 7 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 10:28:37,007 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 68 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 10:28:37,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-10-13 10:28:37,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2024-10-13 10:28:37,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 34 states have (on average 1.4411764705882353) internal successors, (49), 39 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:28:37,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2024-10-13 10:28:37,008 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 14 [2024-10-13 10:28:37,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:28:37,008 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2024-10-13 10:28:37,008 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 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) [2024-10-13 10:28:37,008 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2024-10-13 10:28:37,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-10-13 10:28:37,009 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:28:37,009 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:28:37,022 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-10-13 10:28:37,213 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:28:37,214 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-10-13 10:28:37,215 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:28:37,215 INFO L85 PathProgramCache]: Analyzing trace with hash 133510553, now seen corresponding path program 1 times [2024-10-13 10:28:37,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:28:37,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782829175] [2024-10-13 10:28:37,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:28:37,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:28:37,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:28:37,383 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 10:28:37,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:28:37,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782829175] [2024-10-13 10:28:37,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782829175] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 10:28:37,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669590657] [2024-10-13 10:28:37,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:28:37,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:28:37,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 10:28:37,386 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 10:28:37,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-13 10:28:37,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:28:37,443 INFO L255 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-13 10:28:37,444 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 10:28:37,462 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-13 10:28:37,479 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 10:28:37,479 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-13 10:28:37,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669590657] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 10:28:37,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-13 10:28:37,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 11 [2024-10-13 10:28:37,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770230857] [2024-10-13 10:28:37,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 10:28:37,480 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-13 10:28:37,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:28:37,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-13 10:28:37,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-10-13 10:28:37,480 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:28:37,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:28:37,509 INFO L93 Difference]: Finished difference Result 61 states and 72 transitions. [2024-10-13 10:28:37,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-13 10:28:37,509 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2024-10-13 10:28:37,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:28:37,510 INFO L225 Difference]: With dead ends: 61 [2024-10-13 10:28:37,510 INFO L226 Difference]: Without dead ends: 61 [2024-10-13 10:28:37,510 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-10-13 10:28:37,510 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 4 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 10:28:37,510 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 91 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 10:28:37,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-10-13 10:28:37,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2024-10-13 10:28:37,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 54 states have (on average 1.3148148148148149) internal successors, (71), 59 states have internal predecessors, (71), 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) [2024-10-13 10:28:37,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 71 transitions. [2024-10-13 10:28:37,512 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 71 transitions. Word has length 16 [2024-10-13 10:28:37,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:28:37,512 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 71 transitions. [2024-10-13 10:28:37,512 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:28:37,512 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 71 transitions. [2024-10-13 10:28:37,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-10-13 10:28:37,512 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:28:37,512 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:28:37,526 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-13 10:28:37,716 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:28:37,717 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-10-13 10:28:37,717 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:28:37,717 INFO L85 PathProgramCache]: Analyzing trace with hash -453295461, now seen corresponding path program 1 times [2024-10-13 10:28:37,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:28:37,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268237561] [2024-10-13 10:28:37,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:28:37,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:28:37,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:28:37,856 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 10:28:37,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:28:37,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268237561] [2024-10-13 10:28:37,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268237561] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 10:28:37,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176753256] [2024-10-13 10:28:37,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:28:37,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:28:37,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 10:28:37,859 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 10:28:37,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-13 10:28:37,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:28:37,912 INFO L255 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-13 10:28:37,913 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 10:28:37,957 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-13 10:28:38,013 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 10:28:38,013 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-13 10:28:38,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176753256] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 10:28:38,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-13 10:28:38,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 14 [2024-10-13 10:28:38,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281812906] [2024-10-13 10:28:38,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 10:28:38,014 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-13 10:28:38,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:28:38,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-13 10:28:38,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2024-10-13 10:28:38,015 INFO L87 Difference]: Start difference. First operand 60 states and 71 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:28:38,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:28:38,098 INFO L93 Difference]: Finished difference Result 66 states and 77 transitions. [2024-10-13 10:28:38,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-13 10:28:38,099 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2024-10-13 10:28:38,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:28:38,099 INFO L225 Difference]: With dead ends: 66 [2024-10-13 10:28:38,099 INFO L226 Difference]: Without dead ends: 66 [2024-10-13 10:28:38,100 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2024-10-13 10:28:38,100 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 47 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 10:28:38,100 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 88 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 10:28:38,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-10-13 10:28:38,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2024-10-13 10:28:38,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 48 states have (on average 1.3541666666666667) internal successors, (65), 53 states have internal predecessors, (65), 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) [2024-10-13 10:28:38,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2024-10-13 10:28:38,102 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 16 [2024-10-13 10:28:38,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:28:38,102 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2024-10-13 10:28:38,102 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:28:38,102 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2024-10-13 10:28:38,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-10-13 10:28:38,103 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:28:38,103 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:28:38,120 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-13 10:28:38,306 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:28:38,307 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-10-13 10:28:38,307 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:28:38,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1464412711, now seen corresponding path program 1 times [2024-10-13 10:28:38,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:28:38,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607088619] [2024-10-13 10:28:38,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:28:38,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:28:38,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:28:38,483 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 10:28:38,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:28:38,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607088619] [2024-10-13 10:28:38,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607088619] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 10:28:38,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077513556] [2024-10-13 10:28:38,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:28:38,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:28:38,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 10:28:38,486 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 10:28:38,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-13 10:28:38,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:28:38,539 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-10-13 10:28:38,539 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 10:28:38,624 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-13 10:28:38,647 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:28:38,647 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 10:28:38,652 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2024-10-13 10:28:38,654 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2024-10-13 10:28:38,739 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:28:38,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077513556] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 10:28:38,740 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 10:28:38,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 10] total 21 [2024-10-13 10:28:38,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28385622] [2024-10-13 10:28:38,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 10:28:38,741 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-13 10:28:38,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:28:38,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-13 10:28:38,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2024-10-13 10:28:38,742 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 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) [2024-10-13 10:28:39,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:28:39,166 INFO L93 Difference]: Finished difference Result 85 states and 101 transitions. [2024-10-13 10:28:39,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-13 10:28:39,167 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2024-10-13 10:28:39,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:28:39,167 INFO L225 Difference]: With dead ends: 85 [2024-10-13 10:28:39,167 INFO L226 Difference]: Without dead ends: 85 [2024-10-13 10:28:39,168 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=281, Invalid=1051, Unknown=0, NotChecked=0, Total=1332 [2024-10-13 10:28:39,168 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 130 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-13 10:28:39,169 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 156 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-13 10:28:39,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2024-10-13 10:28:39,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 58. [2024-10-13 10:28:39,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 52 states have (on average 1.3653846153846154) internal successors, (71), 57 states have internal predecessors, (71), 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) [2024-10-13 10:28:39,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 71 transitions. [2024-10-13 10:28:39,170 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 71 transitions. Word has length 16 [2024-10-13 10:28:39,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:28:39,171 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 71 transitions. [2024-10-13 10:28:39,171 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 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) [2024-10-13 10:28:39,171 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 71 transitions. [2024-10-13 10:28:39,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-10-13 10:28:39,171 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:28:39,171 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:28:39,185 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-10-13 10:28:39,375 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-10-13 10:28:39,376 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-10-13 10:28:39,376 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:28:39,376 INFO L85 PathProgramCache]: Analyzing trace with hash -156141614, now seen corresponding path program 1 times [2024-10-13 10:28:39,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:28:39,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010029799] [2024-10-13 10:28:39,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:28:39,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:28:39,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:28:39,408 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 10:28:39,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:28:39,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010029799] [2024-10-13 10:28:39,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010029799] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 10:28:39,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 10:28:39,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-13 10:28:39,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023882993] [2024-10-13 10:28:39,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 10:28:39,409 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-13 10:28:39,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:28:39,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-13 10:28:39,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-13 10:28:39,410 INFO L87 Difference]: Start difference. First operand 58 states and 71 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:28:39,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:28:39,439 INFO L93 Difference]: Finished difference Result 57 states and 70 transitions. [2024-10-13 10:28:39,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-13 10:28:39,439 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2024-10-13 10:28:39,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:28:39,440 INFO L225 Difference]: With dead ends: 57 [2024-10-13 10:28:39,440 INFO L226 Difference]: Without dead ends: 57 [2024-10-13 10:28:39,440 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-13 10:28:39,440 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 17 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 10:28:39,440 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 60 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 10:28:39,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-10-13 10:28:39,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2024-10-13 10:28:39,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.3461538461538463) internal successors, (70), 56 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:28:39,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 70 transitions. [2024-10-13 10:28:39,442 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 70 transitions. Word has length 17 [2024-10-13 10:28:39,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:28:39,442 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 70 transitions. [2024-10-13 10:28:39,442 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:28:39,442 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 70 transitions. [2024-10-13 10:28:39,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-10-13 10:28:39,442 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:28:39,442 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:28:39,442 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-10-13 10:28:39,442 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-10-13 10:28:39,442 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:28:39,443 INFO L85 PathProgramCache]: Analyzing trace with hash -156141613, now seen corresponding path program 1 times [2024-10-13 10:28:39,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:28:39,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795017062] [2024-10-13 10:28:39,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:28:39,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:28:39,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:28:39,522 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 10:28:39,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:28:39,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795017062] [2024-10-13 10:28:39,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795017062] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 10:28:39,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 10:28:39,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-13 10:28:39,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752789859] [2024-10-13 10:28:39,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 10:28:39,524 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-13 10:28:39,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:28:39,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-13 10:28:39,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-10-13 10:28:39,524 INFO L87 Difference]: Start difference. First operand 57 states and 70 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:28:39,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:28:39,579 INFO L93 Difference]: Finished difference Result 77 states and 95 transitions. [2024-10-13 10:28:39,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-13 10:28:39,579 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2024-10-13 10:28:39,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:28:39,579 INFO L225 Difference]: With dead ends: 77 [2024-10-13 10:28:39,580 INFO L226 Difference]: Without dead ends: 77 [2024-10-13 10:28:39,580 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-10-13 10:28:39,580 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 13 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 10:28:39,580 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 97 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 10:28:39,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-10-13 10:28:39,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 59. [2024-10-13 10:28:39,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.3333333333333333) internal successors, (72), 58 states have internal predecessors, (72), 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) [2024-10-13 10:28:39,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 72 transitions. [2024-10-13 10:28:39,582 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 72 transitions. Word has length 17 [2024-10-13 10:28:39,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:28:39,582 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 72 transitions. [2024-10-13 10:28:39,582 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:28:39,582 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 72 transitions. [2024-10-13 10:28:39,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-10-13 10:28:39,583 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:28:39,583 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:28:39,583 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-10-13 10:28:39,583 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-10-13 10:28:39,583 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:28:39,583 INFO L85 PathProgramCache]: Analyzing trace with hash -545422677, now seen corresponding path program 1 times [2024-10-13 10:28:39,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:28:39,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606053086] [2024-10-13 10:28:39,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:28:39,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:28:39,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:28:39,615 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:28:39,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:28:39,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606053086] [2024-10-13 10:28:39,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606053086] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 10:28:39,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 10:28:39,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-13 10:28:39,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809488508] [2024-10-13 10:28:39,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 10:28:39,616 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-13 10:28:39,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:28:39,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-13 10:28:39,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-13 10:28:39,617 INFO L87 Difference]: Start difference. First operand 59 states and 72 transitions. Second operand has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 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) [2024-10-13 10:28:39,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:28:39,647 INFO L93 Difference]: Finished difference Result 58 states and 71 transitions. [2024-10-13 10:28:39,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-13 10:28:39,647 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2024-10-13 10:28:39,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:28:39,647 INFO L225 Difference]: With dead ends: 58 [2024-10-13 10:28:39,648 INFO L226 Difference]: Without dead ends: 58 [2024-10-13 10:28:39,648 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-13 10:28:39,648 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 12 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 10:28:39,648 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 53 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 10:28:39,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-10-13 10:28:39,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2024-10-13 10:28:39,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 54 states have (on average 1.3148148148148149) internal successors, (71), 57 states have internal predecessors, (71), 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) [2024-10-13 10:28:39,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 71 transitions. [2024-10-13 10:28:39,650 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 71 transitions. Word has length 18 [2024-10-13 10:28:39,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:28:39,650 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 71 transitions. [2024-10-13 10:28:39,650 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 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) [2024-10-13 10:28:39,651 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 71 transitions. [2024-10-13 10:28:39,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-10-13 10:28:39,651 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:28:39,651 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:28:39,651 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-10-13 10:28:39,651 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-10-13 10:28:39,652 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:28:39,652 INFO L85 PathProgramCache]: Analyzing trace with hash -545422676, now seen corresponding path program 1 times [2024-10-13 10:28:39,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:28:39,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826090632] [2024-10-13 10:28:39,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:28:39,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:28:39,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:28:39,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 10:28:39,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:28:39,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826090632] [2024-10-13 10:28:39,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826090632] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 10:28:39,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 10:28:39,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-13 10:28:39,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747491188] [2024-10-13 10:28:39,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 10:28:39,732 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-13 10:28:39,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:28:39,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-13 10:28:39,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-10-13 10:28:39,733 INFO L87 Difference]: Start difference. First operand 58 states and 71 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 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) [2024-10-13 10:28:39,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:28:39,760 INFO L93 Difference]: Finished difference Result 61 states and 74 transitions. [2024-10-13 10:28:39,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-13 10:28:39,761 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2024-10-13 10:28:39,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:28:39,761 INFO L225 Difference]: With dead ends: 61 [2024-10-13 10:28:39,761 INFO L226 Difference]: Without dead ends: 61 [2024-10-13 10:28:39,761 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-10-13 10:28:39,762 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 2 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 10:28:39,762 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 68 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 10:28:39,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-10-13 10:28:39,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2024-10-13 10:28:39,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 57 states have (on average 1.2982456140350878) internal successors, (74), 60 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:28:39,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 74 transitions. [2024-10-13 10:28:39,763 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 74 transitions. Word has length 18 [2024-10-13 10:28:39,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:28:39,763 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 74 transitions. [2024-10-13 10:28:39,763 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 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) [2024-10-13 10:28:39,763 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 74 transitions. [2024-10-13 10:28:39,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-10-13 10:28:39,764 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:28:39,764 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:28:39,764 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-10-13 10:28:39,764 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-10-13 10:28:39,764 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:28:39,764 INFO L85 PathProgramCache]: Analyzing trace with hash 436526993, now seen corresponding path program 2 times [2024-10-13 10:28:39,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:28:39,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209595541] [2024-10-13 10:28:39,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:28:39,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:28:39,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:28:40,025 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:28:40,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:28:40,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209595541] [2024-10-13 10:28:40,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209595541] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 10:28:40,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437574571] [2024-10-13 10:28:40,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 10:28:40,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:28:40,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 10:28:40,028 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 10:28:40,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-13 10:28:40,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 10:28:40,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 10:28:40,129 INFO L255 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-10-13 10:28:40,130 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 10:28:40,281 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-10-13 10:28:40,432 INFO L349 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2024-10-13 10:28:40,435 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 18 [2024-10-13 10:28:40,453 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:28:40,453 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 10:28:40,527 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2024-10-13 10:28:40,531 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 10:28:40,532 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 23 [2024-10-13 10:28:40,694 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:28:40,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437574571] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 10:28:40,694 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 10:28:40,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13] total 30 [2024-10-13 10:28:40,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714801244] [2024-10-13 10:28:40,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 10:28:40,695 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-10-13 10:28:40,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:28:40,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-10-13 10:28:40,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=771, Unknown=0, NotChecked=0, Total=870 [2024-10-13 10:28:40,696 INFO L87 Difference]: Start difference. First operand 61 states and 74 transitions. Second operand has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:28:41,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:28:41,642 INFO L93 Difference]: Finished difference Result 108 states and 129 transitions. [2024-10-13 10:28:41,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-10-13 10:28:41,643 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2024-10-13 10:28:41,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:28:41,643 INFO L225 Difference]: With dead ends: 108 [2024-10-13 10:28:41,643 INFO L226 Difference]: Without dead ends: 108 [2024-10-13 10:28:41,644 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=390, Invalid=2262, Unknown=0, NotChecked=0, Total=2652 [2024-10-13 10:28:41,644 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 128 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 756 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-13 10:28:41,644 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 308 Invalid, 771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 756 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-13 10:28:41,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2024-10-13 10:28:41,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 72. [2024-10-13 10:28:41,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 68 states have (on average 1.2941176470588236) internal successors, (88), 71 states have internal predecessors, (88), 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) [2024-10-13 10:28:41,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 88 transitions. [2024-10-13 10:28:41,646 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 88 transitions. Word has length 20 [2024-10-13 10:28:41,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:28:41,646 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 88 transitions. [2024-10-13 10:28:41,646 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:28:41,647 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 88 transitions. [2024-10-13 10:28:41,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-10-13 10:28:41,647 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:28:41,647 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:28:41,660 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-10-13 10:28:41,851 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-10-13 10:28:41,852 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-10-13 10:28:41,852 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:28:41,852 INFO L85 PathProgramCache]: Analyzing trace with hash -825623727, now seen corresponding path program 1 times [2024-10-13 10:28:41,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:28:41,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749598568] [2024-10-13 10:28:41,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:28:41,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:28:41,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:28:41,929 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 10:28:41,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:28:41,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749598568] [2024-10-13 10:28:41,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749598568] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 10:28:41,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 10:28:41,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 10:28:41,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870250473] [2024-10-13 10:28:41,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 10:28:41,931 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 10:28:41,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:28:41,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 10:28:41,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-13 10:28:41,931 INFO L87 Difference]: Start difference. First operand 72 states and 88 transitions. Second operand has 4 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 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) [2024-10-13 10:28:41,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:28:41,945 INFO L93 Difference]: Finished difference Result 71 states and 87 transitions. [2024-10-13 10:28:41,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 10:28:41,946 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 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 21 [2024-10-13 10:28:41,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:28:41,946 INFO L225 Difference]: With dead ends: 71 [2024-10-13 10:28:41,946 INFO L226 Difference]: Without dead ends: 69 [2024-10-13 10:28:41,947 INFO L431 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 [2024-10-13 10:28:41,947 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 10 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 10:28:41,947 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 40 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 10:28:41,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-10-13 10:28:41,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2024-10-13 10:28:41,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 66 states have (on average 1.2878787878787878) internal successors, (85), 68 states have internal predecessors, (85), 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) [2024-10-13 10:28:41,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 85 transitions. [2024-10-13 10:28:41,949 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 85 transitions. Word has length 21 [2024-10-13 10:28:41,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:28:41,949 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 85 transitions. [2024-10-13 10:28:41,949 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 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) [2024-10-13 10:28:41,949 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 85 transitions. [2024-10-13 10:28:41,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-10-13 10:28:41,949 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:28:41,950 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:28:41,950 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-10-13 10:28:41,950 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-10-13 10:28:41,950 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:28:41,950 INFO L85 PathProgramCache]: Analyzing trace with hash -825622565, now seen corresponding path program 1 times [2024-10-13 10:28:41,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:28:41,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637941378] [2024-10-13 10:28:41,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:28:41,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:28:41,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:28:42,044 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 10:28:42,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:28:42,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637941378] [2024-10-13 10:28:42,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637941378] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 10:28:42,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 10:28:42,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-10-13 10:28:42,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030160941] [2024-10-13 10:28:42,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 10:28:42,045 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-13 10:28:42,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:28:42,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-13 10:28:42,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-10-13 10:28:42,045 INFO L87 Difference]: Start difference. First operand 69 states and 85 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 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) [2024-10-13 10:28:42,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:28:42,086 INFO L93 Difference]: Finished difference Result 119 states and 143 transitions. [2024-10-13 10:28:42,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-13 10:28:42,087 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 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 21 [2024-10-13 10:28:42,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:28:42,087 INFO L225 Difference]: With dead ends: 119 [2024-10-13 10:28:42,087 INFO L226 Difference]: Without dead ends: 97 [2024-10-13 10:28:42,087 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-10-13 10:28:42,088 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 5 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 10:28:42,088 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 117 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 10:28:42,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2024-10-13 10:28:42,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2024-10-13 10:28:42,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 92 states have (on average 1.2391304347826086) internal successors, (114), 94 states have internal predecessors, (114), 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) [2024-10-13 10:28:42,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 114 transitions. [2024-10-13 10:28:42,089 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 114 transitions. Word has length 21 [2024-10-13 10:28:42,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:28:42,089 INFO L471 AbstractCegarLoop]: Abstraction has 95 states and 114 transitions. [2024-10-13 10:28:42,089 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 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) [2024-10-13 10:28:42,090 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 114 transitions. [2024-10-13 10:28:42,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-10-13 10:28:42,090 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:28:42,090 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:28:42,090 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-10-13 10:28:42,090 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-10-13 10:28:42,091 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:28:42,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1643271015, now seen corresponding path program 1 times [2024-10-13 10:28:42,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:28:42,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50488192] [2024-10-13 10:28:42,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:28:42,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:28:42,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:28:42,227 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 10:28:42,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:28:42,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50488192] [2024-10-13 10:28:42,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50488192] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 10:28:42,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 10:28:42,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-10-13 10:28:42,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863820244] [2024-10-13 10:28:42,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 10:28:42,229 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-13 10:28:42,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:28:42,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-13 10:28:42,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-10-13 10:28:42,229 INFO L87 Difference]: Start difference. First operand 95 states and 114 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 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) [2024-10-13 10:28:42,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:28:42,302 INFO L93 Difference]: Finished difference Result 104 states and 122 transitions. [2024-10-13 10:28:42,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-13 10:28:42,303 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 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 21 [2024-10-13 10:28:42,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:28:42,304 INFO L225 Difference]: With dead ends: 104 [2024-10-13 10:28:42,304 INFO L226 Difference]: Without dead ends: 88 [2024-10-13 10:28:42,304 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-10-13 10:28:42,305 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 24 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 10:28:42,305 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 109 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 10:28:42,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-10-13 10:28:42,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2024-10-13 10:28:42,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 85 states have (on average 1.2352941176470589) internal successors, (105), 87 states have internal predecessors, (105), 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) [2024-10-13 10:28:42,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 105 transitions. [2024-10-13 10:28:42,307 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 105 transitions. Word has length 21 [2024-10-13 10:28:42,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:28:42,307 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 105 transitions. [2024-10-13 10:28:42,307 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 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) [2024-10-13 10:28:42,307 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 105 transitions. [2024-10-13 10:28:42,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-10-13 10:28:42,307 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:28:42,308 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:28:42,308 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-10-13 10:28:42,308 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-10-13 10:28:42,308 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:28:42,308 INFO L85 PathProgramCache]: Analyzing trace with hash 962752539, now seen corresponding path program 1 times [2024-10-13 10:28:42,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:28:42,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930080582] [2024-10-13 10:28:42,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:28:42,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:28:42,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:28:42,436 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 10:28:42,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:28:42,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930080582] [2024-10-13 10:28:42,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930080582] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 10:28:42,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 10:28:42,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-10-13 10:28:42,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256996684] [2024-10-13 10:28:42,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 10:28:42,437 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-13 10:28:42,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:28:42,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-13 10:28:42,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-10-13 10:28:42,438 INFO L87 Difference]: Start difference. First operand 88 states and 105 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 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) [2024-10-13 10:28:42,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:28:42,485 INFO L93 Difference]: Finished difference Result 135 states and 161 transitions. [2024-10-13 10:28:42,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-13 10:28:42,485 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 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 21 [2024-10-13 10:28:42,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:28:42,486 INFO L225 Difference]: With dead ends: 135 [2024-10-13 10:28:42,486 INFO L226 Difference]: Without dead ends: 122 [2024-10-13 10:28:42,486 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-10-13 10:28:42,486 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 14 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 10:28:42,486 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 111 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 10:28:42,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2024-10-13 10:28:42,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 90. [2024-10-13 10:28:42,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 87 states have (on average 1.2413793103448276) internal successors, (108), 89 states have internal predecessors, (108), 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) [2024-10-13 10:28:42,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 108 transitions. [2024-10-13 10:28:42,488 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 108 transitions. Word has length 21 [2024-10-13 10:28:42,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:28:42,488 INFO L471 AbstractCegarLoop]: Abstraction has 90 states and 108 transitions. [2024-10-13 10:28:42,488 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 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) [2024-10-13 10:28:42,488 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 108 transitions. [2024-10-13 10:28:42,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-10-13 10:28:42,488 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:28:42,488 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:28:42,489 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-10-13 10:28:42,489 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-10-13 10:28:42,489 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:28:42,489 INFO L85 PathProgramCache]: Analyzing trace with hash -1404399964, now seen corresponding path program 1 times [2024-10-13 10:28:42,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:28:42,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848303728] [2024-10-13 10:28:42,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:28:42,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:28:42,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:28:42,705 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:28:42,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:28:42,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848303728] [2024-10-13 10:28:42,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848303728] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 10:28:42,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839685026] [2024-10-13 10:28:42,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:28:42,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:28:42,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 10:28:42,707 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 10:28:42,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-13 10:28:42,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:28:42,775 INFO L255 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-10-13 10:28:42,776 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 10:28:42,779 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-13 10:28:42,839 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:28:42,839 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 10:28:42,972 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:28:42,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839685026] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 10:28:42,972 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 10:28:42,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2024-10-13 10:28:42,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702167881] [2024-10-13 10:28:42,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 10:28:42,973 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-13 10:28:42,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:28:42,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-13 10:28:42,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2024-10-13 10:28:42,976 INFO L87 Difference]: Start difference. First operand 90 states and 108 transitions. Second operand has 21 states, 20 states have (on average 2.55) internal successors, (51), 21 states have internal predecessors, (51), 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) [2024-10-13 10:28:43,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:28:43,129 INFO L93 Difference]: Finished difference Result 112 states and 129 transitions. [2024-10-13 10:28:43,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-13 10:28:43,129 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.55) internal successors, (51), 21 states have internal predecessors, (51), 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 22 [2024-10-13 10:28:43,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:28:43,130 INFO L225 Difference]: With dead ends: 112 [2024-10-13 10:28:43,130 INFO L226 Difference]: Without dead ends: 99 [2024-10-13 10:28:43,130 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2024-10-13 10:28:43,131 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 13 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 10:28:43,131 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 144 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 10:28:43,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2024-10-13 10:28:43,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 89. [2024-10-13 10:28:43,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 86 states have (on average 1.2325581395348837) internal successors, (106), 88 states have internal predecessors, (106), 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) [2024-10-13 10:28:43,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 106 transitions. [2024-10-13 10:28:43,133 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 106 transitions. Word has length 22 [2024-10-13 10:28:43,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:28:43,133 INFO L471 AbstractCegarLoop]: Abstraction has 89 states and 106 transitions. [2024-10-13 10:28:43,133 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.55) internal successors, (51), 21 states have internal predecessors, (51), 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) [2024-10-13 10:28:43,133 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 106 transitions. [2024-10-13 10:28:43,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-10-13 10:28:43,133 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:28:43,134 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:28:43,147 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-10-13 10:28:43,337 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2024-10-13 10:28:43,337 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-10-13 10:28:43,338 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:28:43,338 INFO L85 PathProgramCache]: Analyzing trace with hash -781497654, now seen corresponding path program 1 times [2024-10-13 10:28:43,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:28:43,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80943269] [2024-10-13 10:28:43,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:28:43,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:28:43,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:28:43,407 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-13 10:28:43,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:28:43,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80943269] [2024-10-13 10:28:43,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80943269] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 10:28:43,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939250513] [2024-10-13 10:28:43,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:28:43,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:28:43,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 10:28:43,410 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 10:28:43,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-13 10:28:43,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:28:43,479 INFO L255 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-13 10:28:43,480 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 10:28:43,513 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-13 10:28:43,514 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 10:28:43,550 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-13 10:28:43,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939250513] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 10:28:43,550 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 10:28:43,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2024-10-13 10:28:43,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441404937] [2024-10-13 10:28:43,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 10:28:43,551 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-13 10:28:43,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:28:43,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-13 10:28:43,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2024-10-13 10:28:43,552 INFO L87 Difference]: Start difference. First operand 89 states and 106 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 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) [2024-10-13 10:28:43,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:28:43,649 INFO L93 Difference]: Finished difference Result 89 states and 104 transitions. [2024-10-13 10:28:43,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-13 10:28:43,650 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 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 23 [2024-10-13 10:28:43,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:28:43,650 INFO L225 Difference]: With dead ends: 89 [2024-10-13 10:28:43,650 INFO L226 Difference]: Without dead ends: 89 [2024-10-13 10:28:43,650 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=109, Invalid=311, Unknown=0, NotChecked=0, Total=420 [2024-10-13 10:28:43,651 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 25 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 10:28:43,651 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 90 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 10:28:43,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2024-10-13 10:28:43,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 86. [2024-10-13 10:28:43,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 83 states have (on average 1.216867469879518) internal successors, (101), 85 states have internal predecessors, (101), 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) [2024-10-13 10:28:43,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 101 transitions. [2024-10-13 10:28:43,652 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 101 transitions. Word has length 23 [2024-10-13 10:28:43,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:28:43,652 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 101 transitions. [2024-10-13 10:28:43,652 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 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) [2024-10-13 10:28:43,652 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 101 transitions. [2024-10-13 10:28:43,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-10-13 10:28:43,653 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:28:43,653 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:28:43,666 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-10-13 10:28:43,857 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2024-10-13 10:28:43,858 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-10-13 10:28:43,858 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:28:43,858 INFO L85 PathProgramCache]: Analyzing trace with hash 557876169, now seen corresponding path program 3 times [2024-10-13 10:28:43,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:28:43,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833281318] [2024-10-13 10:28:43,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:28:43,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:28:43,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:28:44,396 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:28:44,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:28:44,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833281318] [2024-10-13 10:28:44,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833281318] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 10:28:44,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410481714] [2024-10-13 10:28:44,397 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-13 10:28:44,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:28:44,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 10:28:44,398 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 10:28:44,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-13 10:28:44,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-10-13 10:28:44,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 10:28:44,472 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-10-13 10:28:44,473 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 10:28:44,484 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2024-10-13 10:28:44,489 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-13 10:28:44,758 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:28:44,759 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 10:28:45,135 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:28:45,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410481714] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 10:28:45,135 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 10:28:45,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 13] total 37 [2024-10-13 10:28:45,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151480656] [2024-10-13 10:28:45,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 10:28:45,138 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-10-13 10:28:45,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:28:45,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-10-13 10:28:45,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1227, Unknown=0, NotChecked=0, Total=1406 [2024-10-13 10:28:45,139 INFO L87 Difference]: Start difference. First operand 86 states and 101 transitions. Second operand has 38 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 38 states have internal predecessors, (67), 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) [2024-10-13 10:28:46,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:28:46,123 INFO L93 Difference]: Finished difference Result 217 states and 247 transitions. [2024-10-13 10:28:46,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-10-13 10:28:46,123 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 38 states have internal predecessors, (67), 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 [2024-10-13 10:28:46,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:28:46,124 INFO L225 Difference]: With dead ends: 217 [2024-10-13 10:28:46,124 INFO L226 Difference]: Without dead ends: 217 [2024-10-13 10:28:46,125 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 602 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=353, Invalid=2299, Unknown=0, NotChecked=0, Total=2652 [2024-10-13 10:28:46,125 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 133 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 959 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 993 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 959 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-13 10:28:46,125 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 302 Invalid, 993 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 959 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-13 10:28:46,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2024-10-13 10:28:46,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 119. [2024-10-13 10:28:46,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 116 states have (on average 1.2413793103448276) internal successors, (144), 118 states have internal predecessors, (144), 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) [2024-10-13 10:28:46,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 144 transitions. [2024-10-13 10:28:46,128 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 144 transitions. Word has length 24 [2024-10-13 10:28:46,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:28:46,128 INFO L471 AbstractCegarLoop]: Abstraction has 119 states and 144 transitions. [2024-10-13 10:28:46,128 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 38 states have internal predecessors, (67), 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) [2024-10-13 10:28:46,128 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 144 transitions. [2024-10-13 10:28:46,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-10-13 10:28:46,129 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:28:46,129 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:28:46,142 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-10-13 10:28:46,332 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:28:46,333 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-10-13 10:28:46,333 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:28:46,333 INFO L85 PathProgramCache]: Analyzing trace with hash -2102248149, now seen corresponding path program 2 times [2024-10-13 10:28:46,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:28:46,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522761083] [2024-10-13 10:28:46,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:28:46,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:28:46,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:28:46,475 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-13 10:28:46,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:28:46,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522761083] [2024-10-13 10:28:46,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522761083] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 10:28:46,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674102287] [2024-10-13 10:28:46,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 10:28:46,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:28:46,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 10:28:46,477 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 10:28:46,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-10-13 10:28:46,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 10:28:46,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 10:28:46,564 INFO L255 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-13 10:28:46,565 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 10:28:46,636 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-13 10:28:46,637 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 10:28:46,728 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-10-13 10:28:46,752 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-13 10:28:46,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674102287] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 10:28:46,752 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 10:28:46,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2024-10-13 10:28:46,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336481639] [2024-10-13 10:28:46,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 10:28:46,752 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-13 10:28:46,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:28:46,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-13 10:28:46,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2024-10-13 10:28:46,753 INFO L87 Difference]: Start difference. First operand 119 states and 144 transitions. Second operand has 20 states, 19 states have (on average 2.526315789473684) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:28:46,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:28:46,869 INFO L93 Difference]: Finished difference Result 126 states and 149 transitions. [2024-10-13 10:28:46,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-13 10:28:46,870 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.526315789473684) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2024-10-13 10:28:46,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:28:46,870 INFO L225 Difference]: With dead ends: 126 [2024-10-13 10:28:46,870 INFO L226 Difference]: Without dead ends: 126 [2024-10-13 10:28:46,871 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2024-10-13 10:28:46,871 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 11 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 10:28:46,871 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 170 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 10:28:46,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2024-10-13 10:28:46,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 123. [2024-10-13 10:28:46,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 120 states have (on average 1.225) internal successors, (147), 122 states have internal predecessors, (147), 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) [2024-10-13 10:28:46,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 147 transitions. [2024-10-13 10:28:46,873 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 147 transitions. Word has length 25 [2024-10-13 10:28:46,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:28:46,873 INFO L471 AbstractCegarLoop]: Abstraction has 123 states and 147 transitions. [2024-10-13 10:28:46,873 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.526315789473684) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:28:46,873 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 147 transitions. [2024-10-13 10:28:46,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-10-13 10:28:46,873 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:28:46,873 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:28:46,886 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-10-13 10:28:47,074 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:28:47,075 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-10-13 10:28:47,075 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:28:47,075 INFO L85 PathProgramCache]: Analyzing trace with hash -751912958, now seen corresponding path program 4 times [2024-10-13 10:28:47,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:28:47,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670752029] [2024-10-13 10:28:47,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:28:47,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:28:47,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:28:47,542 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 10:28:47,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:28:47,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670752029] [2024-10-13 10:28:47,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670752029] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 10:28:47,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528748022] [2024-10-13 10:28:47,542 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-13 10:28:47,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:28:47,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 10:28:47,551 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 10:28:47,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-10-13 10:28:47,633 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-13 10:28:47,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 10:28:47,634 INFO L255 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 58 conjuncts are in the unsatisfiable core [2024-10-13 10:28:47,638 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 10:28:47,670 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-10-13 10:28:48,170 INFO L349 Elim1Store]: treesize reduction 12, result has 73.3 percent of original size [2024-10-13 10:28:48,170 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 48 treesize of output 51 [2024-10-13 10:28:48,243 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-13 10:28:48,243 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 10:28:48,649 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2024-10-13 10:28:48,656 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 77 [2024-10-13 10:28:48,661 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-10-13 10:28:48,683 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-13 10:28:48,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528748022] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 10:28:48,683 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 10:28:48,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 11] total 35 [2024-10-13 10:28:48,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085295228] [2024-10-13 10:28:48,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 10:28:48,684 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-10-13 10:28:48,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:28:48,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-10-13 10:28:48,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1028, Unknown=0, NotChecked=0, Total=1190 [2024-10-13 10:28:48,685 INFO L87 Difference]: Start difference. First operand 123 states and 147 transitions. Second operand has 35 states, 35 states have (on average 1.6285714285714286) internal successors, (57), 35 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:28:49,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:28:49,633 INFO L93 Difference]: Finished difference Result 134 states and 154 transitions. [2024-10-13 10:28:49,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-10-13 10:28:49,633 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6285714285714286) internal successors, (57), 35 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2024-10-13 10:28:49,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:28:49,634 INFO L225 Difference]: With dead ends: 134 [2024-10-13 10:28:49,634 INFO L226 Difference]: Without dead ends: 98 [2024-10-13 10:28:49,635 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=472, Invalid=2950, Unknown=0, NotChecked=0, Total=3422 [2024-10-13 10:28:49,635 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 49 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-13 10:28:49,636 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 164 Invalid, 615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 603 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-13 10:28:49,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2024-10-13 10:28:49,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 73. [2024-10-13 10:28:49,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 71 states have (on average 1.1971830985915493) internal successors, (85), 72 states have internal predecessors, (85), 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) [2024-10-13 10:28:49,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2024-10-13 10:28:49,637 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 26 [2024-10-13 10:28:49,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:28:49,637 INFO L471 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2024-10-13 10:28:49,645 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.6285714285714286) internal successors, (57), 35 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:28:49,645 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2024-10-13 10:28:49,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-10-13 10:28:49,645 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:28:49,645 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:28:49,660 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-10-13 10:28:49,845 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-10-13 10:28:49,846 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-10-13 10:28:49,849 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:28:49,849 INFO L85 PathProgramCache]: Analyzing trace with hash 635029455, now seen corresponding path program 1 times [2024-10-13 10:28:49,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:28:49,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469395110] [2024-10-13 10:28:49,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:28:49,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:28:49,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:28:50,245 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-13 10:28:50,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:28:50,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469395110] [2024-10-13 10:28:50,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469395110] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 10:28:50,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267227730] [2024-10-13 10:28:50,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:28:50,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:28:50,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 10:28:50,248 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 10:28:50,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-10-13 10:28:50,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:28:50,327 INFO L255 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-10-13 10:28:50,328 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 10:28:50,467 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-13 10:28:50,497 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-13 10:28:50,498 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 10:28:50,503 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2024-10-13 10:28:50,505 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2024-10-13 10:28:50,631 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-13 10:28:50,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267227730] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 10:28:50,632 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 10:28:50,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2024-10-13 10:28:50,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768226435] [2024-10-13 10:28:50,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 10:28:50,633 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-10-13 10:28:50,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:28:50,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-10-13 10:28:50,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2024-10-13 10:28:50,635 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:28:51,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:28:51,450 INFO L93 Difference]: Finished difference Result 97 states and 111 transitions. [2024-10-13 10:28:51,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-10-13 10:28:51,450 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2024-10-13 10:28:51,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:28:51,451 INFO L225 Difference]: With dead ends: 97 [2024-10-13 10:28:51,451 INFO L226 Difference]: Without dead ends: 97 [2024-10-13 10:28:51,452 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=382, Invalid=1780, Unknown=0, NotChecked=0, Total=2162 [2024-10-13 10:28:51,452 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 74 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-13 10:28:51,452 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 138 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 493 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-13 10:28:51,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2024-10-13 10:28:51,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 80. [2024-10-13 10:28:51,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 78 states have (on average 1.1923076923076923) internal successors, (93), 79 states have internal predecessors, (93), 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) [2024-10-13 10:28:51,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 93 transitions. [2024-10-13 10:28:51,454 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 93 transitions. Word has length 28 [2024-10-13 10:28:51,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:28:51,454 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 93 transitions. [2024-10-13 10:28:51,454 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:28:51,454 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 93 transitions. [2024-10-13 10:28:51,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-10-13 10:28:51,455 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:28:51,455 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:28:51,468 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-10-13 10:28:51,658 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-10-13 10:28:51,659 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-10-13 10:28:51,659 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:28:51,659 INFO L85 PathProgramCache]: Analyzing trace with hash 934828339, now seen corresponding path program 3 times [2024-10-13 10:28:51,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:28:51,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490628966] [2024-10-13 10:28:51,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:28:51,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:28:51,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:28:51,929 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-13 10:28:51,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:28:51,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490628966] [2024-10-13 10:28:51,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490628966] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 10:28:51,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036631953] [2024-10-13 10:28:51,930 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-13 10:28:51,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:28:51,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 10:28:51,931 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 10:28:51,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-10-13 10:28:52,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-13 10:28:52,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 10:28:52,075 INFO L255 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-10-13 10:28:52,077 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 10:28:52,206 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-13 10:28:52,256 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:28:52,256 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 10:28:52,293 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-10-13 10:28:52,295 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-10-13 10:28:52,420 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:28:52,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036631953] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 10:28:52,420 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 10:28:52,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 14] total 28 [2024-10-13 10:28:52,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2892434] [2024-10-13 10:28:52,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 10:28:52,421 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-10-13 10:28:52,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:28:52,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-10-13 10:28:52,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756 [2024-10-13 10:28:52,422 INFO L87 Difference]: Start difference. First operand 80 states and 93 transitions. Second operand has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 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) [2024-10-13 10:28:52,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:28:52,756 INFO L93 Difference]: Finished difference Result 153 states and 177 transitions. [2024-10-13 10:28:52,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-10-13 10:28:52,756 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 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 29 [2024-10-13 10:28:52,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:28:52,757 INFO L225 Difference]: With dead ends: 153 [2024-10-13 10:28:52,757 INFO L226 Difference]: Without dead ends: 123 [2024-10-13 10:28:52,757 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=299, Invalid=1593, Unknown=0, NotChecked=0, Total=1892 [2024-10-13 10:28:52,758 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 52 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 10:28:52,758 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 193 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 10:28:52,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2024-10-13 10:28:52,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 121. [2024-10-13 10:28:52,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 119 states have (on average 1.1512605042016806) internal successors, (137), 120 states have internal predecessors, (137), 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) [2024-10-13 10:28:52,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 137 transitions. [2024-10-13 10:28:52,759 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 137 transitions. Word has length 29 [2024-10-13 10:28:52,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:28:52,760 INFO L471 AbstractCegarLoop]: Abstraction has 121 states and 137 transitions. [2024-10-13 10:28:52,760 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 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) [2024-10-13 10:28:52,760 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 137 transitions. [2024-10-13 10:28:52,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-10-13 10:28:52,760 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:28:52,760 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:28:52,774 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-10-13 10:28:52,961 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-10-13 10:28:52,961 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-10-13 10:28:52,962 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:28:52,962 INFO L85 PathProgramCache]: Analyzing trace with hash 2094534791, now seen corresponding path program 2 times [2024-10-13 10:28:52,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:28:52,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859347275] [2024-10-13 10:28:52,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:28:52,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:28:52,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:28:53,295 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 10:28:53,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:28:53,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859347275] [2024-10-13 10:28:53,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859347275] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 10:28:53,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664431850] [2024-10-13 10:28:53,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 10:28:53,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:28:53,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 10:28:53,298 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 10:28:53,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-10-13 10:28:53,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 10:28:53,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 10:28:53,382 INFO L255 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-10-13 10:28:53,383 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 10:28:53,538 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-10-13 10:28:53,637 INFO L349 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2024-10-13 10:28:53,637 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 18 [2024-10-13 10:28:53,652 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-13 10:28:53,652 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 10:28:53,715 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2024-10-13 10:28:53,718 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 10:28:53,718 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 23 [2024-10-13 10:28:53,957 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-13 10:28:53,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664431850] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 10:28:53,957 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 10:28:53,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 35 [2024-10-13 10:28:53,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556371897] [2024-10-13 10:28:53,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 10:28:53,958 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-10-13 10:28:53,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:28:53,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-10-13 10:28:53,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1054, Unknown=0, NotChecked=0, Total=1190 [2024-10-13 10:28:53,959 INFO L87 Difference]: Start difference. First operand 121 states and 137 transitions. Second operand has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 states have internal predecessors, (75), 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) [2024-10-13 10:28:54,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:28:54,973 INFO L93 Difference]: Finished difference Result 157 states and 174 transitions. [2024-10-13 10:28:54,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-10-13 10:28:54,974 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 states have internal predecessors, (75), 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 32 [2024-10-13 10:28:54,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:28:54,974 INFO L225 Difference]: With dead ends: 157 [2024-10-13 10:28:54,974 INFO L226 Difference]: Without dead ends: 143 [2024-10-13 10:28:54,975 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 872 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=484, Invalid=3176, Unknown=0, NotChecked=0, Total=3660 [2024-10-13 10:28:54,975 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 55 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 1046 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 1057 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1046 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-13 10:28:54,976 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 212 Invalid, 1057 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1046 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-13 10:28:54,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2024-10-13 10:28:54,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 124. [2024-10-13 10:28:54,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 122 states have (on average 1.1475409836065573) internal successors, (140), 123 states have internal predecessors, (140), 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) [2024-10-13 10:28:54,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 140 transitions. [2024-10-13 10:28:54,980 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 140 transitions. Word has length 32 [2024-10-13 10:28:54,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:28:54,980 INFO L471 AbstractCegarLoop]: Abstraction has 124 states and 140 transitions. [2024-10-13 10:28:54,980 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 states have internal predecessors, (75), 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) [2024-10-13 10:28:54,980 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 140 transitions. [2024-10-13 10:28:54,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-10-13 10:28:54,981 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:28:54,981 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:28:54,994 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-10-13 10:28:55,181 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:28:55,182 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-10-13 10:28:55,182 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:28:55,182 INFO L85 PathProgramCache]: Analyzing trace with hash -1034630461, now seen corresponding path program 4 times [2024-10-13 10:28:55,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:28:55,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399956031] [2024-10-13 10:28:55,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:28:55,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:28:55,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:28:55,436 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-13 10:28:55,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:28:55,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399956031] [2024-10-13 10:28:55,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399956031] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 10:28:55,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653857449] [2024-10-13 10:28:55,437 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-13 10:28:55,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:28:55,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 10:28:55,441 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 10:28:55,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-10-13 10:28:55,532 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-13 10:28:55,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 10:28:55,538 INFO L255 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-10-13 10:28:55,540 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 10:28:55,571 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-10-13 10:28:55,847 INFO L349 Elim1Store]: treesize reduction 4, result has 81.8 percent of original size [2024-10-13 10:28:55,847 INFO L378 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 30 treesize of output 28 [2024-10-13 10:28:55,898 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-10-13 10:28:55,898 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 10:28:56,227 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2024-10-13 10:28:56,234 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2024-10-13 10:28:56,238 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-10-13 10:28:56,263 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-10-13 10:28:56,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653857449] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 10:28:56,263 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 10:28:56,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 27 [2024-10-13 10:28:56,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398439385] [2024-10-13 10:28:56,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 10:28:56,265 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-10-13 10:28:56,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:28:56,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-10-13 10:28:56,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2024-10-13 10:28:56,266 INFO L87 Difference]: Start difference. First operand 124 states and 140 transitions. Second operand has 28 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 28 states have internal predecessors, (67), 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) [2024-10-13 10:28:56,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:28:56,827 INFO L93 Difference]: Finished difference Result 129 states and 143 transitions. [2024-10-13 10:28:56,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-10-13 10:28:56,827 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 28 states have internal predecessors, (67), 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 33 [2024-10-13 10:28:56,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:28:56,828 INFO L225 Difference]: With dead ends: 129 [2024-10-13 10:28:56,828 INFO L226 Difference]: Without dead ends: 129 [2024-10-13 10:28:56,828 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=215, Invalid=1425, Unknown=0, NotChecked=0, Total=1640 [2024-10-13 10:28:56,829 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 12 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-13 10:28:56,829 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 195 Invalid, 443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 442 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-13 10:28:56,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2024-10-13 10:28:56,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 105. [2024-10-13 10:28:56,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.1442307692307692) internal successors, (119), 104 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:28:56,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 119 transitions. [2024-10-13 10:28:56,831 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 119 transitions. Word has length 33 [2024-10-13 10:28:56,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:28:56,831 INFO L471 AbstractCegarLoop]: Abstraction has 105 states and 119 transitions. [2024-10-13 10:28:56,831 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 28 states have internal predecessors, (67), 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) [2024-10-13 10:28:56,831 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 119 transitions. [2024-10-13 10:28:56,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-10-13 10:28:56,832 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:28:56,832 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:28:56,845 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-10-13 10:28:57,035 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-10-13 10:28:57,036 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-10-13 10:28:57,036 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:28:57,036 INFO L85 PathProgramCache]: Analyzing trace with hash 305001407, now seen corresponding path program 3 times [2024-10-13 10:28:57,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:28:57,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177397234] [2024-10-13 10:28:57,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:28:57,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:28:57,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:28:57,597 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 10:28:57,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:28:57,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177397234] [2024-10-13 10:28:57,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177397234] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 10:28:57,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43677902] [2024-10-13 10:28:57,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-13 10:28:57,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:28:57,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 10:28:57,599 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 10:28:57,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-10-13 10:28:57,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-10-13 10:28:57,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 10:28:57,711 INFO L255 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 67 conjuncts are in the unsatisfiable core [2024-10-13 10:28:57,712 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 10:28:57,860 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-10-13 10:28:58,194 INFO L349 Elim1Store]: treesize reduction 4, result has 87.9 percent of original size [2024-10-13 10:28:58,194 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 39 [2024-10-13 10:28:58,392 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-10-13 10:28:58,392 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 10:28:58,981 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 34 [2024-10-13 10:28:59,003 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 10:28:59,004 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 64 treesize of output 82 [2024-10-13 10:28:59,175 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 44 [2024-10-13 10:28:59,319 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-13 10:28:59,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43677902] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 10:28:59,319 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 10:28:59,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 16] total 43 [2024-10-13 10:28:59,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396454036] [2024-10-13 10:28:59,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 10:28:59,320 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-10-13 10:28:59,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:28:59,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-10-13 10:28:59,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1700, Unknown=0, NotChecked=0, Total=1892 [2024-10-13 10:28:59,321 INFO L87 Difference]: Start difference. First operand 105 states and 119 transitions. Second operand has 44 states, 43 states have (on average 2.116279069767442) internal successors, (91), 44 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:29:00,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:29:00,836 INFO L93 Difference]: Finished difference Result 151 states and 167 transitions. [2024-10-13 10:29:00,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-10-13 10:29:00,836 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 2.116279069767442) internal successors, (91), 44 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2024-10-13 10:29:00,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:29:00,837 INFO L225 Difference]: With dead ends: 151 [2024-10-13 10:29:00,837 INFO L226 Difference]: Without dead ends: 118 [2024-10-13 10:29:00,838 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1121 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=635, Invalid=4767, Unknown=0, NotChecked=0, Total=5402 [2024-10-13 10:29:00,839 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 61 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 1245 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 1290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-13 10:29:00,840 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 200 Invalid, 1290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1245 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-13 10:29:00,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2024-10-13 10:29:00,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 88. [2024-10-13 10:29:00,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.1494252873563218) internal successors, (100), 87 states have internal predecessors, (100), 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) [2024-10-13 10:29:00,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 100 transitions. [2024-10-13 10:29:00,844 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 100 transitions. Word has length 36 [2024-10-13 10:29:00,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:29:00,844 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 100 transitions. [2024-10-13 10:29:00,844 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 2.116279069767442) internal successors, (91), 44 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:29:00,845 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 100 transitions. [2024-10-13 10:29:00,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-10-13 10:29:00,846 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:29:00,847 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:29:00,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-10-13 10:29:01,050 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:29:01,050 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-10-13 10:29:01,051 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:29:01,051 INFO L85 PathProgramCache]: Analyzing trace with hash 280462895, now seen corresponding path program 4 times [2024-10-13 10:29:01,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:29:01,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712631292] [2024-10-13 10:29:01,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:29:01,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:29:01,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:29:01,681 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-13 10:29:01,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:29:01,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712631292] [2024-10-13 10:29:01,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712631292] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 10:29:01,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570832117] [2024-10-13 10:29:01,682 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-13 10:29:01,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:29:01,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 10:29:01,684 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 10:29:01,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-10-13 10:29:01,813 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-13 10:29:01,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 10:29:01,815 INFO L255 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-10-13 10:29:01,816 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 10:29:01,999 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-13 10:29:02,033 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-10-13 10:29:02,037 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 10:29:02,047 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2024-10-13 10:29:02,048 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2024-10-13 10:29:02,273 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-10-13 10:29:02,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570832117] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 10:29:02,274 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 10:29:02,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 13, 13] total 36 [2024-10-13 10:29:02,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060763839] [2024-10-13 10:29:02,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 10:29:02,274 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-10-13 10:29:02,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:29:02,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-10-13 10:29:02,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1103, Unknown=0, NotChecked=0, Total=1260 [2024-10-13 10:29:02,275 INFO L87 Difference]: Start difference. First operand 88 states and 100 transitions. Second operand has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 36 states have internal predecessors, (79), 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) [2024-10-13 10:29:02,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:29:02,923 INFO L93 Difference]: Finished difference Result 103 states and 113 transitions. [2024-10-13 10:29:02,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-10-13 10:29:02,924 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 36 states have internal predecessors, (79), 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 40 [2024-10-13 10:29:02,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:29:02,924 INFO L225 Difference]: With dead ends: 103 [2024-10-13 10:29:02,924 INFO L226 Difference]: Without dead ends: 79 [2024-10-13 10:29:02,925 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=579, Invalid=3081, Unknown=0, NotChecked=0, Total=3660 [2024-10-13 10:29:02,925 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 116 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-13 10:29:02,929 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 141 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 465 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-13 10:29:02,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2024-10-13 10:29:02,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 76. [2024-10-13 10:29:02,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.1333333333333333) internal successors, (85), 75 states have internal predecessors, (85), 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) [2024-10-13 10:29:02,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 85 transitions. [2024-10-13 10:29:02,930 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 85 transitions. Word has length 40 [2024-10-13 10:29:02,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:29:02,930 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 85 transitions. [2024-10-13 10:29:02,931 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 36 states have internal predecessors, (79), 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) [2024-10-13 10:29:02,931 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 85 transitions. [2024-10-13 10:29:02,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-10-13 10:29:02,931 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:29:02,931 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:29:02,946 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-10-13 10:29:03,131 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:29:03,132 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-10-13 10:29:03,132 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:29:03,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1282040744, now seen corresponding path program 5 times [2024-10-13 10:29:03,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:29:03,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398492040] [2024-10-13 10:29:03,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:29:03,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:29:03,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:29:03,594 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-13 10:29:03,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:29:03,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398492040] [2024-10-13 10:29:03,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398492040] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 10:29:03,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654083346] [2024-10-13 10:29:03,595 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-13 10:29:03,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:29:03,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 10:29:03,597 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 10:29:03,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-10-13 10:29:03,721 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-10-13 10:29:03,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 10:29:03,723 INFO L255 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-10-13 10:29:03,724 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 10:29:03,926 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-10-13 10:29:04,008 INFO L349 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2024-10-13 10:29:04,008 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 18 [2024-10-13 10:29:04,010 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-13 10:29:04,010 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 10:29:04,048 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2024-10-13 10:29:04,051 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 10:29:04,051 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 23 [2024-10-13 10:29:04,283 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-13 10:29:04,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654083346] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 10:29:04,283 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 10:29:04,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 38 [2024-10-13 10:29:04,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285885069] [2024-10-13 10:29:04,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 10:29:04,284 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-10-13 10:29:04,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:29:04,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-10-13 10:29:04,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=1177, Unknown=0, NotChecked=0, Total=1406 [2024-10-13 10:29:04,285 INFO L87 Difference]: Start difference. First operand 76 states and 85 transitions. Second operand has 38 states, 38 states have (on average 2.0) internal successors, (76), 38 states have internal predecessors, (76), 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) [2024-10-13 10:29:04,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:29:04,788 INFO L93 Difference]: Finished difference Result 91 states and 103 transitions. [2024-10-13 10:29:04,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-10-13 10:29:04,788 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 38 states have internal predecessors, (76), 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 42 [2024-10-13 10:29:04,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:29:04,788 INFO L225 Difference]: With dead ends: 91 [2024-10-13 10:29:04,788 INFO L226 Difference]: Without dead ends: 91 [2024-10-13 10:29:04,789 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1004 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=664, Invalid=2876, Unknown=0, NotChecked=0, Total=3540 [2024-10-13 10:29:04,790 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 104 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 10:29:04,790 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 107 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 10:29:04,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2024-10-13 10:29:04,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 85. [2024-10-13 10:29:04,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.1428571428571428) internal successors, (96), 84 states have internal predecessors, (96), 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) [2024-10-13 10:29:04,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 96 transitions. [2024-10-13 10:29:04,793 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 96 transitions. Word has length 42 [2024-10-13 10:29:04,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:29:04,793 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 96 transitions. [2024-10-13 10:29:04,793 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 38 states have internal predecessors, (76), 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) [2024-10-13 10:29:04,793 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 96 transitions. [2024-10-13 10:29:04,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-10-13 10:29:04,794 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:29:04,794 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:29:04,807 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-10-13 10:29:04,997 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:29:04,998 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-10-13 10:29:04,998 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:29:04,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1246908071, now seen corresponding path program 6 times [2024-10-13 10:29:04,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:29:04,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371120939] [2024-10-13 10:29:04,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:29:04,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:29:05,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:29:05,460 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 9 proven. 38 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-13 10:29:05,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:29:05,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371120939] [2024-10-13 10:29:05,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371120939] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 10:29:05,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057103401] [2024-10-13 10:29:05,460 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-13 10:29:05,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:29:05,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 10:29:05,462 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 10:29:05,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-10-13 10:29:05,774 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-10-13 10:29:05,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 10:29:05,781 INFO L255 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 72 conjuncts are in the unsatisfiable core [2024-10-13 10:29:05,783 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 10:29:06,202 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-10-13 10:29:06,450 INFO L349 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2024-10-13 10:29:06,451 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 26 [2024-10-13 10:29:06,468 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 7 proven. 34 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-13 10:29:06,468 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 10:29:06,587 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 38 [2024-10-13 10:29:06,589 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 10:29:06,590 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 34 [2024-10-13 10:29:07,057 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-13 10:29:07,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057103401] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 10:29:07,057 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 10:29:07,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19, 19] total 50 [2024-10-13 10:29:07,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957811334] [2024-10-13 10:29:07,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 10:29:07,058 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-10-13 10:29:07,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:29:07,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-10-13 10:29:07,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=2207, Unknown=0, NotChecked=0, Total=2450 [2024-10-13 10:29:07,059 INFO L87 Difference]: Start difference. First operand 85 states and 96 transitions. Second operand has 50 states, 50 states have (on average 2.06) internal successors, (103), 50 states have internal predecessors, (103), 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) [2024-10-13 10:29:08,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:29:08,623 INFO L93 Difference]: Finished difference Result 150 states and 169 transitions. [2024-10-13 10:29:08,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2024-10-13 10:29:08,623 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.06) internal successors, (103), 50 states have internal predecessors, (103), 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 44 [2024-10-13 10:29:08,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:29:08,624 INFO L225 Difference]: With dead ends: 150 [2024-10-13 10:29:08,624 INFO L226 Difference]: Without dead ends: 150 [2024-10-13 10:29:08,626 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1827 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=824, Invalid=6658, Unknown=0, NotChecked=0, Total=7482 [2024-10-13 10:29:08,626 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 93 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 1416 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 1431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-13 10:29:08,626 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 309 Invalid, 1431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1416 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-13 10:29:08,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2024-10-13 10:29:08,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 105. [2024-10-13 10:29:08,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.1538461538461537) internal successors, (120), 104 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:29:08,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 120 transitions. [2024-10-13 10:29:08,628 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 120 transitions. Word has length 44 [2024-10-13 10:29:08,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:29:08,628 INFO L471 AbstractCegarLoop]: Abstraction has 105 states and 120 transitions. [2024-10-13 10:29:08,628 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.06) internal successors, (103), 50 states have internal predecessors, (103), 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) [2024-10-13 10:29:08,629 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 120 transitions. [2024-10-13 10:29:08,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-10-13 10:29:08,629 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:29:08,629 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:29:08,642 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-10-13 10:29:08,829 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:29:08,829 INFO L396 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-10-13 10:29:08,830 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:29:08,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1673899238, now seen corresponding path program 7 times [2024-10-13 10:29:08,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:29:08,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867158164] [2024-10-13 10:29:08,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:29:08,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:29:08,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:29:09,264 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-13 10:29:09,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:29:09,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867158164] [2024-10-13 10:29:09,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867158164] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 10:29:09,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276309586] [2024-10-13 10:29:09,265 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-13 10:29:09,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:29:09,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 10:29:09,266 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 10:29:09,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-10-13 10:29:09,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:29:09,377 INFO L255 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-10-13 10:29:09,378 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 10:29:09,450 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-10-13 10:29:09,555 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-10-13 10:29:09,556 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 10:29:09,575 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-10-13 10:29:09,577 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-10-13 10:29:09,632 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-10-13 10:29:09,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276309586] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 10:29:09,633 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 10:29:09,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 28 [2024-10-13 10:29:09,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726703126] [2024-10-13 10:29:09,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 10:29:09,633 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-10-13 10:29:09,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:29:09,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-10-13 10:29:09,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=684, Unknown=0, NotChecked=0, Total=756 [2024-10-13 10:29:09,634 INFO L87 Difference]: Start difference. First operand 105 states and 120 transitions. Second operand has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:29:09,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:29:09,966 INFO L93 Difference]: Finished difference Result 232 states and 257 transitions. [2024-10-13 10:29:09,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-13 10:29:09,966 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2024-10-13 10:29:09,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:29:09,967 INFO L225 Difference]: With dead ends: 232 [2024-10-13 10:29:09,967 INFO L226 Difference]: Without dead ends: 150 [2024-10-13 10:29:09,967 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=145, Invalid=1415, Unknown=0, NotChecked=0, Total=1560 [2024-10-13 10:29:09,968 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 6 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-13 10:29:09,968 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 225 Invalid, 424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 420 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-13 10:29:09,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2024-10-13 10:29:09,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 147. [2024-10-13 10:29:09,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 1.13013698630137) internal successors, (165), 146 states have internal predecessors, (165), 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) [2024-10-13 10:29:09,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 165 transitions. [2024-10-13 10:29:09,970 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 165 transitions. Word has length 46 [2024-10-13 10:29:09,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:29:09,970 INFO L471 AbstractCegarLoop]: Abstraction has 147 states and 165 transitions. [2024-10-13 10:29:09,970 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:29:09,970 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 165 transitions. [2024-10-13 10:29:09,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-10-13 10:29:09,970 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:29:09,971 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:29:09,983 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-10-13 10:29:10,171 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2024-10-13 10:29:10,171 INFO L396 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-10-13 10:29:10,171 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:29:10,172 INFO L85 PathProgramCache]: Analyzing trace with hash 601132183, now seen corresponding path program 8 times [2024-10-13 10:29:10,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:29:10,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996620872] [2024-10-13 10:29:10,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:29:10,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:29:10,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:29:10,802 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 31 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-13 10:29:10,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:29:10,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996620872] [2024-10-13 10:29:10,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996620872] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 10:29:10,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351568063] [2024-10-13 10:29:10,803 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 10:29:10,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:29:10,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 10:29:10,807 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 10:29:10,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-10-13 10:29:10,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 10:29:10,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 10:29:10,933 INFO L255 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-10-13 10:29:10,937 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 10:29:11,276 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-13 10:29:11,314 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-10-13 10:29:11,314 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 10:29:11,336 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2024-10-13 10:29:11,338 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2024-10-13 10:29:11,623 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 11 proven. 16 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-10-13 10:29:11,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351568063] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 10:29:11,623 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 10:29:11,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 15, 15] total 45 [2024-10-13 10:29:11,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940381283] [2024-10-13 10:29:11,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 10:29:11,624 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-10-13 10:29:11,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:29:11,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-10-13 10:29:11,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=1745, Unknown=0, NotChecked=0, Total=1980 [2024-10-13 10:29:11,625 INFO L87 Difference]: Start difference. First operand 147 states and 165 transitions. Second operand has 45 states, 45 states have (on average 2.2) internal successors, (99), 45 states have internal predecessors, (99), 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) [2024-10-13 10:29:13,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:29:13,008 INFO L93 Difference]: Finished difference Result 169 states and 186 transitions. [2024-10-13 10:29:13,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2024-10-13 10:29:13,009 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.2) internal successors, (99), 45 states have internal predecessors, (99), 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 48 [2024-10-13 10:29:13,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:29:13,009 INFO L225 Difference]: With dead ends: 169 [2024-10-13 10:29:13,009 INFO L226 Difference]: Without dead ends: 141 [2024-10-13 10:29:13,010 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1915 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1125, Invalid=6185, Unknown=0, NotChecked=0, Total=7310 [2024-10-13 10:29:13,010 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 86 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 687 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-13 10:29:13,010 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 191 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 687 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-13 10:29:13,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2024-10-13 10:29:13,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 139. [2024-10-13 10:29:13,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 1.1231884057971016) internal successors, (155), 138 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:29:13,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 155 transitions. [2024-10-13 10:29:13,012 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 155 transitions. Word has length 48 [2024-10-13 10:29:13,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:29:13,012 INFO L471 AbstractCegarLoop]: Abstraction has 139 states and 155 transitions. [2024-10-13 10:29:13,012 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.2) internal successors, (99), 45 states have internal predecessors, (99), 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) [2024-10-13 10:29:13,012 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 155 transitions. [2024-10-13 10:29:13,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-10-13 10:29:13,013 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:29:13,013 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:29:13,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-10-13 10:29:13,213 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2024-10-13 10:29:13,213 INFO L396 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-10-13 10:29:13,214 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:29:13,214 INFO L85 PathProgramCache]: Analyzing trace with hash -1450829729, now seen corresponding path program 9 times [2024-10-13 10:29:13,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:29:13,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998978969] [2024-10-13 10:29:13,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:29:13,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:29:13,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:29:13,769 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 16 proven. 50 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-13 10:29:13,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:29:13,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998978969] [2024-10-13 10:29:13,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998978969] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 10:29:13,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473985225] [2024-10-13 10:29:13,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-13 10:29:13,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:29:13,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 10:29:13,772 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 10:29:13,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-10-13 10:29:13,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-10-13 10:29:13,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 10:29:13,991 INFO L255 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 115 conjuncts are in the unsatisfiable core [2024-10-13 10:29:13,993 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 10:29:14,309 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-10-13 10:29:14,678 INFO L349 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2024-10-13 10:29:14,678 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 39 [2024-10-13 10:29:14,881 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 6 proven. 34 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 10:29:14,881 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 10:29:15,399 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2024-10-13 10:29:15,405 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 45 [2024-10-13 10:29:15,526 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-10-13 10:29:15,962 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-10-13 10:29:15,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473985225] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 10:29:15,963 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 10:29:15,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21, 22] total 59 [2024-10-13 10:29:15,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39178914] [2024-10-13 10:29:15,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 10:29:15,964 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2024-10-13 10:29:15,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:29:15,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2024-10-13 10:29:15,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=3241, Unknown=0, NotChecked=0, Total=3540 [2024-10-13 10:29:15,965 INFO L87 Difference]: Start difference. First operand 139 states and 155 transitions. Second operand has 60 states, 59 states have (on average 2.016949152542373) internal successors, (119), 60 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:29:19,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:29:19,187 INFO L93 Difference]: Finished difference Result 292 states and 319 transitions. [2024-10-13 10:29:19,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2024-10-13 10:29:19,187 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 59 states have (on average 2.016949152542373) internal successors, (119), 60 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2024-10-13 10:29:19,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:29:19,188 INFO L225 Difference]: With dead ends: 292 [2024-10-13 10:29:19,188 INFO L226 Difference]: Without dead ends: 266 [2024-10-13 10:29:19,189 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2787 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=917, Invalid=10425, Unknown=0, NotChecked=0, Total=11342 [2024-10-13 10:29:19,189 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 95 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 2848 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 2896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 2848 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-10-13 10:29:19,189 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 435 Invalid, 2896 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 2848 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-10-13 10:29:19,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2024-10-13 10:29:19,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 166. [2024-10-13 10:29:19,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 1.1333333333333333) internal successors, (187), 165 states have internal predecessors, (187), 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) [2024-10-13 10:29:19,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 187 transitions. [2024-10-13 10:29:19,192 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 187 transitions. Word has length 48 [2024-10-13 10:29:19,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:29:19,192 INFO L471 AbstractCegarLoop]: Abstraction has 166 states and 187 transitions. [2024-10-13 10:29:19,192 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 59 states have (on average 2.016949152542373) internal successors, (119), 60 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:29:19,192 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 187 transitions. [2024-10-13 10:29:19,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-10-13 10:29:19,193 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:29:19,193 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:29:19,207 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-10-13 10:29:19,397 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2024-10-13 10:29:19,398 INFO L396 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-10-13 10:29:19,398 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:29:19,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1565044401, now seen corresponding path program 10 times [2024-10-13 10:29:19,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:29:19,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563713194] [2024-10-13 10:29:19,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:29:19,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:29:19,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:29:19,988 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 25 proven. 20 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-10-13 10:29:19,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:29:19,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563713194] [2024-10-13 10:29:19,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563713194] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 10:29:19,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493961438] [2024-10-13 10:29:19,989 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-13 10:29:19,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:29:19,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 10:29:19,990 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 10:29:19,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-10-13 10:29:20,209 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-13 10:29:20,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 10:29:20,211 INFO L255 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-10-13 10:29:20,213 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 10:29:20,305 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-10-13 10:29:20,454 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 12 proven. 33 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-10-13 10:29:20,455 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 10:29:20,480 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-10-13 10:29:20,481 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-10-13 10:29:20,549 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 12 proven. 33 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-10-13 10:29:20,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493961438] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 10:29:20,549 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 10:29:20,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 31 [2024-10-13 10:29:20,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541029071] [2024-10-13 10:29:20,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 10:29:20,550 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-10-13 10:29:20,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:29:20,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-10-13 10:29:20,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=852, Unknown=0, NotChecked=0, Total=930 [2024-10-13 10:29:20,551 INFO L87 Difference]: Start difference. First operand 166 states and 187 transitions. Second operand has 31 states, 31 states have (on average 2.5806451612903225) internal successors, (80), 31 states have internal predecessors, (80), 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) [2024-10-13 10:29:21,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:29:21,048 INFO L93 Difference]: Finished difference Result 333 states and 366 transitions. [2024-10-13 10:29:21,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-10-13 10:29:21,048 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.5806451612903225) internal successors, (80), 31 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2024-10-13 10:29:21,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:29:21,049 INFO L225 Difference]: With dead ends: 333 [2024-10-13 10:29:21,049 INFO L226 Difference]: Without dead ends: 236 [2024-10-13 10:29:21,050 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=176, Invalid=1894, Unknown=0, NotChecked=0, Total=2070 [2024-10-13 10:29:21,050 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 12 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 645 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-13 10:29:21,050 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 303 Invalid, 653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 645 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-13 10:29:21,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2024-10-13 10:29:21,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 220. [2024-10-13 10:29:21,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 1.1369863013698631) internal successors, (249), 219 states have internal predecessors, (249), 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) [2024-10-13 10:29:21,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 249 transitions. [2024-10-13 10:29:21,053 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 249 transitions. Word has length 52 [2024-10-13 10:29:21,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:29:21,053 INFO L471 AbstractCegarLoop]: Abstraction has 220 states and 249 transitions. [2024-10-13 10:29:21,053 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.5806451612903225) internal successors, (80), 31 states have internal predecessors, (80), 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) [2024-10-13 10:29:21,053 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 249 transitions. [2024-10-13 10:29:21,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-10-13 10:29:21,054 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:29:21,054 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:29:21,072 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-10-13 10:29:21,254 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:29:21,254 INFO L396 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-10-13 10:29:21,255 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:29:21,255 INFO L85 PathProgramCache]: Analyzing trace with hash -1055791040, now seen corresponding path program 11 times [2024-10-13 10:29:21,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:29:21,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898399975] [2024-10-13 10:29:21,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:29:21,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:29:21,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:29:21,654 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 8 proven. 37 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-10-13 10:29:21,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:29:21,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898399975] [2024-10-13 10:29:21,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898399975] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 10:29:21,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808060908] [2024-10-13 10:29:21,655 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-13 10:29:21,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:29:21,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 10:29:21,656 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 10:29:21,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-10-13 10:29:21,865 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-10-13 10:29:21,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 10:29:21,867 INFO L255 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-10-13 10:29:21,869 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 10:29:22,134 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-13 10:29:22,138 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-10-13 10:29:22,139 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-10-13 10:29:22,139 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 10:29:22,146 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2024-10-13 10:29:22,147 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2024-10-13 10:29:22,359 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 20 proven. 25 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-10-13 10:29:22,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808060908] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 10:29:22,359 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 10:29:22,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 40 [2024-10-13 10:29:22,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000512745] [2024-10-13 10:29:22,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 10:29:22,360 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-10-13 10:29:22,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:29:22,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-10-13 10:29:22,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=1247, Unknown=0, NotChecked=0, Total=1560 [2024-10-13 10:29:22,361 INFO L87 Difference]: Start difference. First operand 220 states and 249 transitions. Second operand has 40 states, 40 states have (on average 2.15) internal successors, (86), 40 states have internal predecessors, (86), 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) [2024-10-13 10:29:22,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:29:22,893 INFO L93 Difference]: Finished difference Result 220 states and 247 transitions. [2024-10-13 10:29:22,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-10-13 10:29:22,894 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.15) internal successors, (86), 40 states have internal predecessors, (86), 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 54 [2024-10-13 10:29:22,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:29:22,894 INFO L225 Difference]: With dead ends: 220 [2024-10-13 10:29:22,894 INFO L226 Difference]: Without dead ends: 220 [2024-10-13 10:29:22,895 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1201 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1040, Invalid=3382, Unknown=0, NotChecked=0, Total=4422 [2024-10-13 10:29:22,895 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 129 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 10:29:22,896 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 102 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 10:29:22,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2024-10-13 10:29:22,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 211. [2024-10-13 10:29:22,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 1.1333333333333333) internal successors, (238), 210 states have internal predecessors, (238), 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) [2024-10-13 10:29:22,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 238 transitions. [2024-10-13 10:29:22,898 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 238 transitions. Word has length 54 [2024-10-13 10:29:22,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:29:22,898 INFO L471 AbstractCegarLoop]: Abstraction has 211 states and 238 transitions. [2024-10-13 10:29:22,898 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.15) internal successors, (86), 40 states have internal predecessors, (86), 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) [2024-10-13 10:29:22,899 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 238 transitions. [2024-10-13 10:29:22,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-10-13 10:29:22,899 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:29:22,899 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:29:22,912 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2024-10-13 10:29:23,099 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2024-10-13 10:29:23,100 INFO L396 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-10-13 10:29:23,100 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:29:23,100 INFO L85 PathProgramCache]: Analyzing trace with hash -329181496, now seen corresponding path program 12 times [2024-10-13 10:29:23,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:29:23,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800130840] [2024-10-13 10:29:23,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:29:23,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:29:23,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:29:23,977 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 12 proven. 51 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-10-13 10:29:23,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:29:23,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800130840] [2024-10-13 10:29:23,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800130840] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 10:29:23,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410885702] [2024-10-13 10:29:23,978 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-13 10:29:23,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:29:23,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 10:29:23,979 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 10:29:23,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-10-13 10:29:24,192 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-10-13 10:29:24,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 10:29:24,195 INFO L255 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-10-13 10:29:24,197 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 10:29:24,550 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-10-13 10:29:24,731 INFO L349 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2024-10-13 10:29:24,731 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 26 [2024-10-13 10:29:24,734 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 20 proven. 43 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-10-13 10:29:24,734 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 10:29:24,831 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 38 [2024-10-13 10:29:24,834 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 10:29:24,835 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 34 [2024-10-13 10:29:25,215 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 27 proven. 36 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-10-13 10:29:25,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410885702] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 10:29:25,215 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 10:29:25,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 54 [2024-10-13 10:29:25,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988025869] [2024-10-13 10:29:25,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 10:29:25,216 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2024-10-13 10:29:25,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:29:25,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2024-10-13 10:29:25,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=387, Invalid=2475, Unknown=0, NotChecked=0, Total=2862 [2024-10-13 10:29:25,217 INFO L87 Difference]: Start difference. First operand 211 states and 238 transitions. Second operand has 54 states, 54 states have (on average 1.8518518518518519) internal successors, (100), 54 states have internal predecessors, (100), 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) [2024-10-13 10:29:26,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:29:26,556 INFO L93 Difference]: Finished difference Result 242 states and 273 transitions. [2024-10-13 10:29:26,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-10-13 10:29:26,557 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.8518518518518519) internal successors, (100), 54 states have internal predecessors, (100), 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 54 [2024-10-13 10:29:26,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:29:26,557 INFO L225 Difference]: With dead ends: 242 [2024-10-13 10:29:26,557 INFO L226 Difference]: Without dead ends: 233 [2024-10-13 10:29:26,558 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 74 SyntacticMatches, 2 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2330 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1169, Invalid=6487, Unknown=0, NotChecked=0, Total=7656 [2024-10-13 10:29:26,558 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 138 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 730 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-13 10:29:26,558 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 179 Invalid, 746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 730 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-13 10:29:26,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2024-10-13 10:29:26,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 224. [2024-10-13 10:29:26,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 1.1390134529147982) internal successors, (254), 223 states have internal predecessors, (254), 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) [2024-10-13 10:29:26,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 254 transitions. [2024-10-13 10:29:26,561 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 254 transitions. Word has length 54 [2024-10-13 10:29:26,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:29:26,561 INFO L471 AbstractCegarLoop]: Abstraction has 224 states and 254 transitions. [2024-10-13 10:29:26,562 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.8518518518518519) internal successors, (100), 54 states have internal predecessors, (100), 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) [2024-10-13 10:29:26,562 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 254 transitions. [2024-10-13 10:29:26,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-10-13 10:29:26,562 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:29:26,562 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 5, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:29:26,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2024-10-13 10:29:26,762 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2024-10-13 10:29:26,763 INFO L396 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-10-13 10:29:26,763 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:29:26,763 INFO L85 PathProgramCache]: Analyzing trace with hash 611358407, now seen corresponding path program 13 times [2024-10-13 10:29:26,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:29:26,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635610905] [2024-10-13 10:29:26,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:29:26,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:29:26,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:29:27,343 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 25 proven. 65 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-13 10:29:27,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:29:27,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635610905] [2024-10-13 10:29:27,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635610905] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 10:29:27,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981058547] [2024-10-13 10:29:27,343 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-13 10:29:27,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:29:27,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 10:29:27,344 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 10:29:27,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-10-13 10:29:27,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:29:27,482 INFO L255 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 81 conjuncts are in the unsatisfiable core [2024-10-13 10:29:27,484 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 10:29:27,873 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-10-13 10:29:29,145 INFO L349 Elim1Store]: treesize reduction 17, result has 48.5 percent of original size [2024-10-13 10:29:29,146 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 48 treesize of output 34 [2024-10-13 10:29:29,169 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 18 proven. 57 refuted. 3 times theorem prover too weak. 21 trivial. 0 not checked. [2024-10-13 10:29:29,169 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 10:29:29,412 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2024-10-13 10:29:29,415 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 10:29:29,415 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 59 treesize of output 45 [2024-10-13 10:29:29,943 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 29 proven. 49 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-10-13 10:29:29,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981058547] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 10:29:29,944 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 10:29:29,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 24, 24] total 63 [2024-10-13 10:29:29,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278125941] [2024-10-13 10:29:29,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 10:29:29,944 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2024-10-13 10:29:29,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:29:29,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2024-10-13 10:29:29,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=373, Invalid=3529, Unknown=4, NotChecked=0, Total=3906 [2024-10-13 10:29:29,946 INFO L87 Difference]: Start difference. First operand 224 states and 254 transitions. Second operand has 63 states, 63 states have (on average 2.015873015873016) internal successors, (127), 63 states have internal predecessors, (127), 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) [2024-10-13 10:29:34,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:29:34,870 INFO L93 Difference]: Finished difference Result 376 states and 412 transitions. [2024-10-13 10:29:34,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2024-10-13 10:29:34,871 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.015873015873016) internal successors, (127), 63 states have internal predecessors, (127), 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 56 [2024-10-13 10:29:34,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:29:34,872 INFO L225 Difference]: With dead ends: 376 [2024-10-13 10:29:34,872 INFO L226 Difference]: Without dead ends: 350 [2024-10-13 10:29:34,872 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 68 SyntacticMatches, 3 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 4805 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=1707, Invalid=14540, Unknown=9, NotChecked=0, Total=16256 [2024-10-13 10:29:34,873 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 90 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 3439 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 534 SdHoareTripleChecker+Invalid, 3459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 3439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-10-13 10:29:34,873 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 534 Invalid, 3459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 3439 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-10-13 10:29:34,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2024-10-13 10:29:34,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 244. [2024-10-13 10:29:34,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 1.1358024691358024) internal successors, (276), 243 states have internal predecessors, (276), 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) [2024-10-13 10:29:34,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 276 transitions. [2024-10-13 10:29:34,876 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 276 transitions. Word has length 56 [2024-10-13 10:29:34,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:29:34,876 INFO L471 AbstractCegarLoop]: Abstraction has 244 states and 276 transitions. [2024-10-13 10:29:34,876 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.015873015873016) internal successors, (127), 63 states have internal predecessors, (127), 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) [2024-10-13 10:29:34,877 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 276 transitions. [2024-10-13 10:29:34,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-10-13 10:29:34,877 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:29:34,877 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 6, 6, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:29:34,890 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-10-13 10:29:35,077 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:29:35,078 INFO L396 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-10-13 10:29:35,078 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:29:35,078 INFO L85 PathProgramCache]: Analyzing trace with hash -272565309, now seen corresponding path program 14 times [2024-10-13 10:29:35,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:29:35,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869420606] [2024-10-13 10:29:35,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:29:35,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:29:35,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:29:35,936 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 118 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-13 10:29:35,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:29:35,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869420606] [2024-10-13 10:29:35,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869420606] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 10:29:35,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185568465] [2024-10-13 10:29:35,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 10:29:35,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:29:35,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 10:29:35,938 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 10:29:35,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-10-13 10:29:36,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 10:29:36,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 10:29:36,101 INFO L255 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 63 conjuncts are in the unsatisfiable core [2024-10-13 10:29:36,103 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 10:29:36,523 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-10-13 10:29:38,115 INFO L349 Elim1Store]: treesize reduction 17, result has 48.5 percent of original size [2024-10-13 10:29:38,115 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 48 treesize of output 34 [2024-10-13 10:29:38,144 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 46 proven. 42 refuted. 4 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 10:29:38,144 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 10:29:38,437 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2024-10-13 10:29:38,440 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 10:29:38,440 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 59 treesize of output 45 [2024-10-13 10:29:38,961 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 56 proven. 36 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-13 10:29:38,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185568465] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 10:29:38,962 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 10:29:38,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22, 22] total 62 [2024-10-13 10:29:38,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066550506] [2024-10-13 10:29:38,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 10:29:38,962 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2024-10-13 10:29:38,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:29:38,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2024-10-13 10:29:38,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=3476, Unknown=5, NotChecked=0, Total=3782 [2024-10-13 10:29:38,963 INFO L87 Difference]: Start difference. First operand 244 states and 276 transitions. Second operand has 62 states, 62 states have (on average 1.967741935483871) internal successors, (122), 62 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:29:41,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:29:41,713 INFO L93 Difference]: Finished difference Result 341 states and 376 transitions. [2024-10-13 10:29:41,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2024-10-13 10:29:41,713 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.967741935483871) internal successors, (122), 62 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2024-10-13 10:29:41,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:29:41,714 INFO L225 Difference]: With dead ends: 341 [2024-10-13 10:29:41,714 INFO L226 Difference]: Without dead ends: 330 [2024-10-13 10:29:41,715 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 72 SyntacticMatches, 3 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2100 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=985, Invalid=8322, Unknown=5, NotChecked=0, Total=9312 [2024-10-13 10:29:41,715 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 99 mSDsluCounter, 484 mSDsCounter, 0 mSdLazyCounter, 2285 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 2312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 2285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-10-13 10:29:41,720 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 501 Invalid, 2312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 2285 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-10-13 10:29:41,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2024-10-13 10:29:41,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 318. [2024-10-13 10:29:41,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 1.1230283911671923) internal successors, (356), 317 states have internal predecessors, (356), 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) [2024-10-13 10:29:41,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 356 transitions. [2024-10-13 10:29:41,728 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 356 transitions. Word has length 56 [2024-10-13 10:29:41,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:29:41,728 INFO L471 AbstractCegarLoop]: Abstraction has 318 states and 356 transitions. [2024-10-13 10:29:41,728 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.967741935483871) internal successors, (122), 62 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:29:41,728 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 356 transitions. [2024-10-13 10:29:41,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-10-13 10:29:41,729 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:29:41,729 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:29:41,750 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2024-10-13 10:29:41,929 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:29:41,930 INFO L396 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-10-13 10:29:41,930 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:29:41,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1847012100, now seen corresponding path program 1 times [2024-10-13 10:29:41,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:29:41,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416959700] [2024-10-13 10:29:41,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:29:41,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:29:41,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:29:42,577 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 72 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:29:42,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:29:42,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416959700] [2024-10-13 10:29:42,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416959700] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 10:29:42,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106003011] [2024-10-13 10:29:42,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:29:42,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:29:42,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 10:29:42,579 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 10:29:42,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-10-13 10:29:42,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:29:42,716 INFO L255 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 56 conjuncts are in the unsatisfiable core [2024-10-13 10:29:42,717 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 10:29:42,868 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-10-13 10:29:43,084 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 35 proven. 56 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-10-13 10:29:43,084 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 10:29:43,110 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-10-13 10:29:43,111 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-10-13 10:29:43,189 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 35 proven. 56 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-10-13 10:29:43,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106003011] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 10:29:43,190 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 10:29:43,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 17, 17] total 42 [2024-10-13 10:29:43,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780112328] [2024-10-13 10:29:43,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 10:29:43,190 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-10-13 10:29:43,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:29:43,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-10-13 10:29:43,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1589, Unknown=0, NotChecked=0, Total=1722 [2024-10-13 10:29:43,191 INFO L87 Difference]: Start difference. First operand 318 states and 356 transitions. Second operand has 42 states, 42 states have (on average 2.5) internal successors, (105), 42 states have internal predecessors, (105), 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) [2024-10-13 10:29:44,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:29:44,541 INFO L93 Difference]: Finished difference Result 621 states and 672 transitions. [2024-10-13 10:29:44,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2024-10-13 10:29:44,541 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.5) internal successors, (105), 42 states have internal predecessors, (105), 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 58 [2024-10-13 10:29:44,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:29:44,543 INFO L225 Difference]: With dead ends: 621 [2024-10-13 10:29:44,543 INFO L226 Difference]: Without dead ends: 379 [2024-10-13 10:29:44,543 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1454 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=600, Invalid=5880, Unknown=0, NotChecked=0, Total=6480 [2024-10-13 10:29:44,544 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 81 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 1289 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 1299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-13 10:29:44,544 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 477 Invalid, 1299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1289 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-13 10:29:44,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2024-10-13 10:29:44,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 348. [2024-10-13 10:29:44,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 1.1268011527377522) internal successors, (391), 347 states have internal predecessors, (391), 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) [2024-10-13 10:29:44,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 391 transitions. [2024-10-13 10:29:44,548 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 391 transitions. Word has length 58 [2024-10-13 10:29:44,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:29:44,548 INFO L471 AbstractCegarLoop]: Abstraction has 348 states and 391 transitions. [2024-10-13 10:29:44,548 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.5) internal successors, (105), 42 states have internal predecessors, (105), 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) [2024-10-13 10:29:44,548 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 391 transitions. [2024-10-13 10:29:44,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-10-13 10:29:44,549 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:29:44,549 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 7, 7, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:29:44,564 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2024-10-13 10:29:44,753 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2024-10-13 10:29:44,754 INFO L396 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-10-13 10:29:44,754 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:29:44,754 INFO L85 PathProgramCache]: Analyzing trace with hash 504773762, now seen corresponding path program 15 times [2024-10-13 10:29:44,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:29:44,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466275059] [2024-10-13 10:29:44,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:29:44,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:29:44,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:29:45,608 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 131 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-13 10:29:45,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:29:45,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466275059] [2024-10-13 10:29:45,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466275059] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 10:29:45,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042127945] [2024-10-13 10:29:45,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-13 10:29:45,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:29:45,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 10:29:45,610 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 10:29:45,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-10-13 10:29:45,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2024-10-13 10:29:45,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 10:29:45,868 INFO L255 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 114 conjuncts are in the unsatisfiable core [2024-10-13 10:29:45,870 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 10:29:46,323 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-10-13 10:29:46,847 INFO L349 Elim1Store]: treesize reduction 21, result has 48.8 percent of original size [2024-10-13 10:29:46,847 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 49 treesize of output 42 [2024-10-13 10:29:46,879 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 41 proven. 72 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-10-13 10:29:46,880 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 10:29:47,296 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 64 [2024-10-13 10:29:47,299 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 10:29:47,300 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 74 treesize of output 56 [2024-10-13 10:29:48,149 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-10-13 10:29:48,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042127945] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 10:29:48,149 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 10:29:48,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 70 [2024-10-13 10:29:48,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015640800] [2024-10-13 10:29:48,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 10:29:48,150 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2024-10-13 10:29:48,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:29:48,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2024-10-13 10:29:48,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=368, Invalid=4462, Unknown=0, NotChecked=0, Total=4830 [2024-10-13 10:29:48,151 INFO L87 Difference]: Start difference. First operand 348 states and 391 transitions. Second operand has 70 states, 70 states have (on average 1.9142857142857144) internal successors, (134), 70 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:29:51,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:29:51,352 INFO L93 Difference]: Finished difference Result 430 states and 474 transitions. [2024-10-13 10:29:51,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2024-10-13 10:29:51,353 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 1.9142857142857144) internal successors, (134), 70 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2024-10-13 10:29:51,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:29:51,354 INFO L225 Difference]: With dead ends: 430 [2024-10-13 10:29:51,354 INFO L226 Difference]: Without dead ends: 417 [2024-10-13 10:29:51,354 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2993 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1147, Invalid=11063, Unknown=0, NotChecked=0, Total=12210 [2024-10-13 10:29:51,355 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 102 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 3152 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 585 SdHoareTripleChecker+Invalid, 3187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 3152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-10-13 10:29:51,355 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 585 Invalid, 3187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 3152 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-10-13 10:29:51,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2024-10-13 10:29:51,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 388. [2024-10-13 10:29:51,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 1.1162790697674418) internal successors, (432), 387 states have internal predecessors, (432), 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) [2024-10-13 10:29:51,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 432 transitions. [2024-10-13 10:29:51,359 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 432 transitions. Word has length 58 [2024-10-13 10:29:51,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:29:51,359 INFO L471 AbstractCegarLoop]: Abstraction has 388 states and 432 transitions. [2024-10-13 10:29:51,359 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 1.9142857142857144) internal successors, (134), 70 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:29:51,359 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 432 transitions. [2024-10-13 10:29:51,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-10-13 10:29:51,360 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:29:51,360 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 6, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:29:51,378 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2024-10-13 10:29:51,564 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:29:51,565 INFO L396 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-10-13 10:29:51,565 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:29:51,565 INFO L85 PathProgramCache]: Analyzing trace with hash 687023871, now seen corresponding path program 16 times [2024-10-13 10:29:51,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:29:51,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815074912] [2024-10-13 10:29:51,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:29:51,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:29:51,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:29:52,327 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 36 proven. 79 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-13 10:29:52,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:29:52,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815074912] [2024-10-13 10:29:52,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815074912] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 10:29:52,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487825424] [2024-10-13 10:29:52,328 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-13 10:29:52,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:29:52,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 10:29:52,329 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 10:29:52,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-10-13 10:29:52,587 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-13 10:29:52,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 10:29:52,590 INFO L255 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 79 conjuncts are in the unsatisfiable core [2024-10-13 10:29:52,592 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 10:29:53,056 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-10-13 10:29:57,765 INFO L349 Elim1Store]: treesize reduction 21, result has 48.8 percent of original size [2024-10-13 10:29:57,766 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 58 treesize of output 42 [2024-10-13 10:29:57,797 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 19 proven. 73 refuted. 11 times theorem prover too weak. 21 trivial. 0 not checked. [2024-10-13 10:29:57,798 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 10:29:58,205 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 64 [2024-10-13 10:29:58,212 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 10:29:58,213 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 74 treesize of output 56 [2024-10-13 10:29:58,886 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 39 proven. 64 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-10-13 10:29:58,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487825424] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 10:29:58,887 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 10:29:58,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 27, 27] total 71 [2024-10-13 10:29:58,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963857133] [2024-10-13 10:29:58,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 10:29:58,887 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2024-10-13 10:29:58,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:29:58,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2024-10-13 10:29:58,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=439, Invalid=4515, Unknown=16, NotChecked=0, Total=4970 [2024-10-13 10:29:58,888 INFO L87 Difference]: Start difference. First operand 388 states and 432 transitions. Second operand has 71 states, 71 states have (on average 1.9577464788732395) internal successors, (139), 71 states have internal predecessors, (139), 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)