./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 61a67961 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-wip.fs.cvc5-61a6796-m [2024-10-14 17:42:46,915 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-14 17:42:46,950 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-14 17:42:46,953 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-14 17:42:46,953 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-14 17:42:46,968 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-14 17:42:46,968 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-14 17:42:46,969 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-14 17:42:46,969 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-14 17:42:46,969 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-14 17:42:46,970 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-14 17:42:46,977 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-14 17:42:46,983 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-14 17:42:46,984 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-14 17:42:46,984 INFO L153 SettingsManager]: * Use SBE=true [2024-10-14 17:42:46,984 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-14 17:42:46,984 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-14 17:42:46,985 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-14 17:42:46,985 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-14 17:42:46,985 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-14 17:42:46,985 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-14 17:42:46,988 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-14 17:42:46,988 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-14 17:42:46,988 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-14 17:42:46,989 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-14 17:42:46,989 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-14 17:42:46,989 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-14 17:42:46,989 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-14 17:42:46,989 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-14 17:42:46,990 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-14 17:42:46,990 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-14 17:42:46,990 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-14 17:42:46,990 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-14 17:42:46,990 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 17:42:46,991 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-14 17:42:46,991 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-14 17:42:46,991 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-14 17:42:46,997 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-14 17:42:46,997 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-14 17:42:46,997 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-14 17:42:46,997 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-14 17:42:47,002 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-14 17:42:47,002 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bfd8ca9d9dda86f57445168715d124831c95b647e7c1b1093bb129b0384cce9e [2024-10-14 17:42:47,380 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-14 17:42:47,416 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-14 17:42:47,418 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-14 17:42:47,419 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-14 17:42:47,427 INFO L274 PluginConnector]: CDTParser initialized [2024-10-14 17:42:47,428 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/cstrcat-alloca-2.i [2024-10-14 17:42:49,266 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-14 17:42:49,457 INFO L384 CDTParser]: Found 1 translation units. [2024-10-14 17:42:49,458 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/cstrcat-alloca-2.i [2024-10-14 17:42:49,470 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a5c569779/cff93a5d68984333b7de863cc7841ffe/FLAGb388b0ef9 [2024-10-14 17:42:49,480 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a5c569779/cff93a5d68984333b7de863cc7841ffe [2024-10-14 17:42:49,482 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-14 17:42:49,482 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-14 17:42:49,483 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-14 17:42:49,483 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-14 17:42:49,487 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-14 17:42:49,488 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:42:49" (1/1) ... [2024-10-14 17:42:49,488 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7553d31b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:42:49, skipping insertion in model container [2024-10-14 17:42:49,488 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:42:49" (1/1) ... [2024-10-14 17:42:49,512 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-14 17:42:49,746 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 17:42:49,761 INFO L200 MainTranslator]: Completed pre-run [2024-10-14 17:42:49,794 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 17:42:49,820 INFO L204 MainTranslator]: Completed translation [2024-10-14 17:42:49,820 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:42:49 WrapperNode [2024-10-14 17:42:49,820 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-14 17:42:49,821 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-14 17:42:49,821 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-14 17:42:49,821 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-14 17:42:49,826 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:42:49" (1/1) ... [2024-10-14 17:42:49,834 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:42:49" (1/1) ... [2024-10-14 17:42:49,848 INFO L138 Inliner]: procedures = 117, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 99 [2024-10-14 17:42:49,848 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-14 17:42:49,849 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-14 17:42:49,849 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-14 17:42:49,849 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-14 17:42:49,859 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:42:49" (1/1) ... [2024-10-14 17:42:49,859 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:42:49" (1/1) ... [2024-10-14 17:42:49,861 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:42:49" (1/1) ... [2024-10-14 17:42:49,877 INFO L175 MemorySlicer]: Split 7 memory accesses to 2 slices as follows [3, 4]. 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 [2, 3]. [2024-10-14 17:42:49,877 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:42:49" (1/1) ... [2024-10-14 17:42:49,877 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:42:49" (1/1) ... [2024-10-14 17:42:49,881 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:42:49" (1/1) ... [2024-10-14 17:42:49,883 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:42:49" (1/1) ... [2024-10-14 17:42:49,884 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:42:49" (1/1) ... [2024-10-14 17:42:49,885 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:42:49" (1/1) ... [2024-10-14 17:42:49,886 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-14 17:42:49,887 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-14 17:42:49,887 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-14 17:42:49,887 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-14 17:42:49,888 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:42:49" (1/1) ... [2024-10-14 17:42:49,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 17:42:49,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:42:49,920 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) [2024-10-14 17:42:49,923 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 [2024-10-14 17:42:49,979 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-14 17:42:49,979 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-14 17:42:49,979 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-14 17:42:49,979 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-14 17:42:49,980 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-14 17:42:49,981 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-14 17:42:49,981 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-14 17:42:49,981 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-14 17:42:50,173 INFO L238 CfgBuilder]: Building ICFG [2024-10-14 17:42:50,178 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-14 17:42:50,340 INFO L? ?]: Removed 59 outVars from TransFormulas that were not future-live. [2024-10-14 17:42:50,341 INFO L287 CfgBuilder]: Performing block encoding [2024-10-14 17:42:50,366 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-14 17:42:50,367 INFO L314 CfgBuilder]: Removed 4 assume(true) statements. [2024-10-14 17:42:50,367 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:42:50 BoogieIcfgContainer [2024-10-14 17:42:50,367 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-14 17:42:50,368 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-14 17:42:50,369 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-14 17:42:50,372 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-14 17:42:50,373 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 05:42:49" (1/3) ... [2024-10-14 17:42:50,373 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40816928 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:42:50, skipping insertion in model container [2024-10-14 17:42:50,374 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:42:49" (2/3) ... [2024-10-14 17:42:50,374 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40816928 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:42:50, skipping insertion in model container [2024-10-14 17:42:50,375 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:42:50" (3/3) ... [2024-10-14 17:42:50,376 INFO L112 eAbstractionObserver]: Analyzing ICFG cstrcat-alloca-2.i [2024-10-14 17:42:50,390 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-14 17:42:50,390 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2024-10-14 17:42:50,424 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-14 17:42:50,429 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;@f2c4796, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-14 17:42:50,429 INFO L334 AbstractCegarLoop]: Starting to check reachability of 15 error locations. [2024-10-14 17:42:50,433 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) [2024-10-14 17:42:50,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-10-14 17:42:50,438 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:42:50,438 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-14 17:42:50,438 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)] === [2024-10-14 17:42:50,442 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:42:50,442 INFO L85 PathProgramCache]: Analyzing trace with hash -138777939, now seen corresponding path program 1 times [2024-10-14 17:42:50,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:42:50,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749167419] [2024-10-14 17:42:50,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:42:50,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:42:50,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:42:50,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:42:50,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:42:50,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749167419] [2024-10-14 17:42:50,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749167419] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:42:50,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 17:42:50,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-14 17:42:50,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316027788] [2024-10-14 17:42:50,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:42:50,677 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-14 17:42:50,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:42:50,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-14 17:42:50,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-14 17:42:50,706 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) [2024-10-14 17:42:50,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:42:50,813 INFO L93 Difference]: Finished difference Result 62 states and 77 transitions. [2024-10-14 17:42:50,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 17:42:50,815 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 [2024-10-14 17:42:50,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:42:50,820 INFO L225 Difference]: With dead ends: 62 [2024-10-14 17:42:50,820 INFO L226 Difference]: Without dead ends: 61 [2024-10-14 17:42:50,822 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 [2024-10-14 17:42:50,824 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 [2024-10-14 17:42:50,825 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] [2024-10-14 17:42:50,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-10-14 17:42:50,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 39. [2024-10-14 17:42:50,846 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) [2024-10-14 17:42:50,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions. [2024-10-14 17:42:50,848 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 48 transitions. Word has length 6 [2024-10-14 17:42:50,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:42:50,848 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 48 transitions. [2024-10-14 17:42:50,848 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) [2024-10-14 17:42:50,849 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 48 transitions. [2024-10-14 17:42:50,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-10-14 17:42:50,849 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:42:50,849 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-14 17:42:50,849 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-14 17:42:50,849 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)] === [2024-10-14 17:42:50,850 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:42:50,850 INFO L85 PathProgramCache]: Analyzing trace with hash -138776017, now seen corresponding path program 1 times [2024-10-14 17:42:50,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:42:50,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573688021] [2024-10-14 17:42:50,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:42:50,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:42:50,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:42:50,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:42:50,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:42:50,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573688021] [2024-10-14 17:42:50,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573688021] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:42:50,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 17:42:50,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-14 17:42:50,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138815865] [2024-10-14 17:42:50,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:42:50,874 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 17:42:50,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:42:50,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 17:42:50,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 17:42:50,875 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) [2024-10-14 17:42:50,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:42:50,900 INFO L93 Difference]: Finished difference Result 40 states and 48 transitions. [2024-10-14 17:42:50,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 17:42:50,901 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 [2024-10-14 17:42:50,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:42:50,901 INFO L225 Difference]: With dead ends: 40 [2024-10-14 17:42:50,901 INFO L226 Difference]: Without dead ends: 39 [2024-10-14 17:42:50,902 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 [2024-10-14 17:42:50,903 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 [2024-10-14 17:42:50,903 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] [2024-10-14 17:42:50,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-10-14 17:42:50,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2024-10-14 17:42:50,906 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) [2024-10-14 17:42:50,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2024-10-14 17:42:50,906 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 6 [2024-10-14 17:42:50,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:42:50,907 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2024-10-14 17:42:50,907 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) [2024-10-14 17:42:50,907 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2024-10-14 17:42:50,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-10-14 17:42:50,908 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:42:50,908 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:42:50,908 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-14 17:42:50,908 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)] === [2024-10-14 17:42:50,909 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:42:50,909 INFO L85 PathProgramCache]: Analyzing trace with hash -7149119, now seen corresponding path program 1 times [2024-10-14 17:42:50,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:42:50,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60177843] [2024-10-14 17:42:50,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:42:50,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:42:50,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:42:50,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:42:50,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:42:50,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60177843] [2024-10-14 17:42:50,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60177843] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:42:50,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 17:42:50,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-14 17:42:50,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322252241] [2024-10-14 17:42:50,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:42:50,987 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 17:42:50,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:42:50,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 17:42:50,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-14 17:42:50,988 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) [2024-10-14 17:42:51,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:42:51,011 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2024-10-14 17:42:51,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 17:42:51,011 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 [2024-10-14 17:42:51,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:42:51,012 INFO L225 Difference]: With dead ends: 48 [2024-10-14 17:42:51,012 INFO L226 Difference]: Without dead ends: 48 [2024-10-14 17:42:51,012 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 [2024-10-14 17:42:51,013 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 [2024-10-14 17:42:51,013 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] [2024-10-14 17:42:51,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-10-14 17:42:51,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 40. [2024-10-14 17:42:51,016 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) [2024-10-14 17:42:51,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2024-10-14 17:42:51,017 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 7 [2024-10-14 17:42:51,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:42:51,017 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2024-10-14 17:42:51,017 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) [2024-10-14 17:42:51,018 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2024-10-14 17:42:51,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-10-14 17:42:51,018 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:42:51,018 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:42:51,018 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-14 17:42:51,019 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)] === [2024-10-14 17:42:51,019 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:42:51,019 INFO L85 PathProgramCache]: Analyzing trace with hash 50109183, now seen corresponding path program 1 times [2024-10-14 17:42:51,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:42:51,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42338443] [2024-10-14 17:42:51,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:42:51,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:42:51,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:42:51,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:42:51,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:42:51,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42338443] [2024-10-14 17:42:51,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42338443] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:42:51,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 17:42:51,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-14 17:42:51,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398463871] [2024-10-14 17:42:51,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:42:51,096 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-14 17:42:51,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:42:51,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-14 17:42:51,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-14 17:42:51,098 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) [2024-10-14 17:42:51,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:42:51,237 INFO L93 Difference]: Finished difference Result 51 states and 62 transitions. [2024-10-14 17:42:51,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 17:42:51,238 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 [2024-10-14 17:42:51,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:42:51,239 INFO L225 Difference]: With dead ends: 51 [2024-10-14 17:42:51,239 INFO L226 Difference]: Without dead ends: 51 [2024-10-14 17:42:51,240 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 [2024-10-14 17:42:51,241 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 16 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 17:42:51,241 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 120 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 17:42:51,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-10-14 17:42:51,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 40. [2024-10-14 17:42:51,249 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) [2024-10-14 17:42:51,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2024-10-14 17:42:51,250 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 7 [2024-10-14 17:42:51,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:42:51,251 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2024-10-14 17:42:51,251 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) [2024-10-14 17:42:51,251 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2024-10-14 17:42:51,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-10-14 17:42:51,252 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:42:51,252 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:42:51,252 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-14 17:42:51,252 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)] === [2024-10-14 17:42:51,253 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:42:51,253 INFO L85 PathProgramCache]: Analyzing trace with hash 51956225, now seen corresponding path program 1 times [2024-10-14 17:42:51,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:42:51,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944249573] [2024-10-14 17:42:51,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:42:51,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:42:51,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:42:51,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:42:51,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:42:51,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944249573] [2024-10-14 17:42:51,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944249573] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:42:51,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 17:42:51,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 17:42:51,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34324979] [2024-10-14 17:42:51,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:42:51,396 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 17:42:51,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:42:51,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 17:42:51,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 17:42:51,398 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) [2024-10-14 17:42:51,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:42:51,426 INFO L93 Difference]: Finished difference Result 38 states and 46 transitions. [2024-10-14 17:42:51,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 17:42:51,427 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 [2024-10-14 17:42:51,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:42:51,427 INFO L225 Difference]: With dead ends: 38 [2024-10-14 17:42:51,428 INFO L226 Difference]: Without dead ends: 38 [2024-10-14 17:42:51,428 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 [2024-10-14 17:42:51,429 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 [2024-10-14 17:42:51,432 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] [2024-10-14 17:42:51,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-10-14 17:42:51,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2024-10-14 17:42:51,434 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) [2024-10-14 17:42:51,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2024-10-14 17:42:51,435 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 7 [2024-10-14 17:42:51,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:42:51,436 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2024-10-14 17:42:51,437 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) [2024-10-14 17:42:51,437 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2024-10-14 17:42:51,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-10-14 17:42:51,437 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:42:51,437 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:42:51,437 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-14 17:42:51,438 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)] === [2024-10-14 17:42:51,438 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:42:51,438 INFO L85 PathProgramCache]: Analyzing trace with hash 51956226, now seen corresponding path program 1 times [2024-10-14 17:42:51,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:42:51,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770835389] [2024-10-14 17:42:51,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:42:51,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:42:51,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:42:51,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:42:51,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:42:51,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770835389] [2024-10-14 17:42:51,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770835389] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:42:51,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 17:42:51,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-14 17:42:51,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841951900] [2024-10-14 17:42:51,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:42:51,622 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-14 17:42:51,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:42:51,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-14 17:42:51,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-14 17:42:51,623 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) [2024-10-14 17:42:51,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:42:51,697 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2024-10-14 17:42:51,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-14 17:42:51,698 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 [2024-10-14 17:42:51,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:42:51,699 INFO L225 Difference]: With dead ends: 41 [2024-10-14 17:42:51,699 INFO L226 Difference]: Without dead ends: 41 [2024-10-14 17:42:51,699 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 [2024-10-14 17:42:51,700 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 28 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 17:42:51,700 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 78 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 17:42:51,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-10-14 17:42:51,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2024-10-14 17:42:51,703 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) [2024-10-14 17:42:51,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2024-10-14 17:42:51,703 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 7 [2024-10-14 17:42:51,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:42:51,703 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2024-10-14 17:42:51,704 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) [2024-10-14 17:42:51,704 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2024-10-14 17:42:51,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-10-14 17:42:51,704 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:42:51,704 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:42:51,704 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-14 17:42:51,705 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)] === [2024-10-14 17:42:51,705 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:42:51,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1719580973, now seen corresponding path program 1 times [2024-10-14 17:42:51,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:42:51,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156928400] [2024-10-14 17:42:51,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:42:51,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:42:51,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:42:51,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:42:51,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:42:51,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156928400] [2024-10-14 17:42:51,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156928400] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:42:51,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 17:42:51,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-14 17:42:51,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124603022] [2024-10-14 17:42:51,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:42:51,833 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-14 17:42:51,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:42:51,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-14 17:42:51,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-14 17:42:51,834 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) [2024-10-14 17:42:51,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:42:51,875 INFO L93 Difference]: Finished difference Result 47 states and 59 transitions. [2024-10-14 17:42:51,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 17:42:51,876 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 [2024-10-14 17:42:51,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:42:51,876 INFO L225 Difference]: With dead ends: 47 [2024-10-14 17:42:51,876 INFO L226 Difference]: Without dead ends: 47 [2024-10-14 17:42:51,876 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 [2024-10-14 17:42:51,877 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, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 17:42:51,879 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 70 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 17:42:51,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-10-14 17:42:51,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 38. [2024-10-14 17:42:51,884 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) [2024-10-14 17:42:51,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2024-10-14 17:42:51,884 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 9 [2024-10-14 17:42:51,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:42:51,884 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2024-10-14 17:42:51,884 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) [2024-10-14 17:42:51,885 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2024-10-14 17:42:51,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-10-14 17:42:51,885 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:42:51,885 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:42:51,885 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-14 17:42:51,885 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)] === [2024-10-14 17:42:51,886 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:42:51,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1719580974, now seen corresponding path program 1 times [2024-10-14 17:42:51,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:42:51,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887677337] [2024-10-14 17:42:51,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:42:51,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:42:51,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:42:51,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:42:51,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:42:51,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887677337] [2024-10-14 17:42:51,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887677337] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:42:51,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 17:42:51,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-14 17:42:51,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536922670] [2024-10-14 17:42:51,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:42:51,996 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-14 17:42:51,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:42:51,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-14 17:42:51,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-14 17:42:51,997 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) [2024-10-14 17:42:52,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:42:52,067 INFO L93 Difference]: Finished difference Result 47 states and 58 transitions. [2024-10-14 17:42:52,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 17:42:52,068 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 [2024-10-14 17:42:52,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:42:52,068 INFO L225 Difference]: With dead ends: 47 [2024-10-14 17:42:52,068 INFO L226 Difference]: Without dead ends: 47 [2024-10-14 17:42:52,068 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-10-14 17:42:52,069 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 14 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 17:42:52,069 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 94 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 17:42:52,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-10-14 17:42:52,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2024-10-14 17:42:52,071 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) [2024-10-14 17:42:52,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 54 transitions. [2024-10-14 17:42:52,072 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 54 transitions. Word has length 9 [2024-10-14 17:42:52,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:42:52,072 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 54 transitions. [2024-10-14 17:42:52,072 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) [2024-10-14 17:42:52,072 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 54 transitions. [2024-10-14 17:42:52,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-10-14 17:42:52,072 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:42:52,073 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:42:52,073 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-14 17:42:52,073 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)] === [2024-10-14 17:42:52,073 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:42:52,073 INFO L85 PathProgramCache]: Analyzing trace with hash -800378960, now seen corresponding path program 1 times [2024-10-14 17:42:52,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:42:52,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297630572] [2024-10-14 17:42:52,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:42:52,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:42:52,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:42:52,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:42:52,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:42:52,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297630572] [2024-10-14 17:42:52,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297630572] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:42:52,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 17:42:52,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-14 17:42:52,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362607023] [2024-10-14 17:42:52,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:42:52,178 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-14 17:42:52,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:42:52,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-14 17:42:52,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-10-14 17:42:52,179 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) [2024-10-14 17:42:52,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:42:52,219 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2024-10-14 17:42:52,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-14 17:42:52,219 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 [2024-10-14 17:42:52,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:42:52,220 INFO L225 Difference]: With dead ends: 46 [2024-10-14 17:42:52,220 INFO L226 Difference]: Without dead ends: 46 [2024-10-14 17:42:52,220 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-10-14 17:42:52,220 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 13 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 17:42:52,220 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 76 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 17:42:52,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-10-14 17:42:52,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2024-10-14 17:42:52,222 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) [2024-10-14 17:42:52,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2024-10-14 17:42:52,223 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 9 [2024-10-14 17:42:52,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:42:52,223 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2024-10-14 17:42:52,223 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) [2024-10-14 17:42:52,223 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2024-10-14 17:42:52,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-10-14 17:42:52,223 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:42:52,223 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:42:52,223 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-14 17:42:52,224 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)] === [2024-10-14 17:42:52,224 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:42:52,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1609600271, now seen corresponding path program 1 times [2024-10-14 17:42:52,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:42:52,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383418168] [2024-10-14 17:42:52,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:42:52,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:42:52,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:42:52,356 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:42:52,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:42:52,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383418168] [2024-10-14 17:42:52,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383418168] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:42:52,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877120524] [2024-10-14 17:42:52,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:42:52,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:42:52,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:42:52,359 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) [2024-10-14 17:42:52,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-14 17:42:52,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:42:52,410 INFO L255 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-14 17:42:52,413 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:42:52,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-14 17:42:52,478 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 [2024-10-14 17:42:52,483 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-10-14 17:42:52,589 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:42:52,589 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:42:52,691 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-14 17:42:52,723 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:42:52,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877120524] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:42:52,724 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:42:52,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 13 [2024-10-14 17:42:52,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588264833] [2024-10-14 17:42:52,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:42:52,725 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-14 17:42:52,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:42:52,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-14 17:42:52,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2024-10-14 17:42:52,725 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) [2024-10-14 17:42:52,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:42:52,872 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2024-10-14 17:42:52,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-14 17:42:52,872 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 [2024-10-14 17:42:52,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:42:52,872 INFO L225 Difference]: With dead ends: 40 [2024-10-14 17:42:52,872 INFO L226 Difference]: Without dead ends: 40 [2024-10-14 17:42:52,873 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 [2024-10-14 17:42:52,873 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 [2024-10-14 17:42:52,873 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] [2024-10-14 17:42:52,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-10-14 17:42:52,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2024-10-14 17:42:52,875 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) [2024-10-14 17:42:52,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2024-10-14 17:42:52,875 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 9 [2024-10-14 17:42:52,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:42:52,876 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2024-10-14 17:42:52,876 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) [2024-10-14 17:42:52,876 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2024-10-14 17:42:52,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-10-14 17:42:52,876 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:42:52,876 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:42:52,891 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-14 17:42:53,080 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 [2024-10-14 17:42:53,081 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)] === [2024-10-14 17:42:53,082 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:42:53,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1045031729, now seen corresponding path program 1 times [2024-10-14 17:42:53,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:42:53,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894204720] [2024-10-14 17:42:53,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:42:53,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:42:53,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:42:53,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:42:53,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:42:53,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894204720] [2024-10-14 17:42:53,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894204720] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:42:53,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140668546] [2024-10-14 17:42:53,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:42:53,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:42:53,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:42:53,117 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) [2024-10-14 17:42:53,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-14 17:42:53,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:42:53,160 INFO L255 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-14 17:42:53,161 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:42:53,186 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:42:53,186 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 17:42:53,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140668546] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:42:53,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-14 17:42:53,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2024-10-14 17:42:53,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048205114] [2024-10-14 17:42:53,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:42:53,187 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-14 17:42:53,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:42:53,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-14 17:42:53,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-10-14 17:42:53,188 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) [2024-10-14 17:42:53,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:42:53,203 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2024-10-14 17:42:53,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 17:42:53,203 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 [2024-10-14 17:42:53,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:42:53,203 INFO L225 Difference]: With dead ends: 44 [2024-10-14 17:42:53,204 INFO L226 Difference]: Without dead ends: 44 [2024-10-14 17:42:53,204 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 [2024-10-14 17:42:53,204 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 [2024-10-14 17:42:53,204 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] [2024-10-14 17:42:53,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-10-14 17:42:53,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2024-10-14 17:42:53,206 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) [2024-10-14 17:42:53,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2024-10-14 17:42:53,206 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 11 [2024-10-14 17:42:53,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:42:53,207 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2024-10-14 17:42:53,207 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) [2024-10-14 17:42:53,207 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2024-10-14 17:42:53,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-10-14 17:42:53,207 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:42:53,207 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:42:53,219 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-14 17:42:53,407 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 [2024-10-14 17:42:53,408 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)] === [2024-10-14 17:42:53,408 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:42:53,408 INFO L85 PathProgramCache]: Analyzing trace with hash -364973359, now seen corresponding path program 1 times [2024-10-14 17:42:53,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:42:53,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381303626] [2024-10-14 17:42:53,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:42:53,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:42:53,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:42:53,536 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:42:53,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:42:53,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381303626] [2024-10-14 17:42:53,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381303626] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:42:53,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115578730] [2024-10-14 17:42:53,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:42:53,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:42:53,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:42:53,538 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) [2024-10-14 17:42:53,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-14 17:42:53,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:42:53,584 INFO L255 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-14 17:42:53,586 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:42:53,603 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 [2024-10-14 17:42:53,608 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 [2024-10-14 17:42:53,713 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:42:53,714 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:42:53,852 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:42:53,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115578730] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:42:53,853 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:42:53,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2024-10-14 17:42:53,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627107426] [2024-10-14 17:42:53,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:42:53,853 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-14 17:42:53,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:42:53,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-14 17:42:53,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2024-10-14 17:42:53,854 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) [2024-10-14 17:42:54,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:42:54,026 INFO L93 Difference]: Finished difference Result 44 states and 54 transitions. [2024-10-14 17:42:54,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-14 17:42:54,026 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 [2024-10-14 17:42:54,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:42:54,027 INFO L225 Difference]: With dead ends: 44 [2024-10-14 17:42:54,027 INFO L226 Difference]: Without dead ends: 44 [2024-10-14 17:42:54,027 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=150, Invalid=312, Unknown=0, NotChecked=0, Total=462 [2024-10-14 17:42:54,027 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 9 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 17:42:54,028 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 183 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 17:42:54,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-10-14 17:42:54,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2024-10-14 17:42:54,029 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) [2024-10-14 17:42:54,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 51 transitions. [2024-10-14 17:42:54,030 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 51 transitions. Word has length 11 [2024-10-14 17:42:54,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:42:54,030 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 51 transitions. [2024-10-14 17:42:54,030 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) [2024-10-14 17:42:54,030 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 51 transitions. [2024-10-14 17:42:54,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-10-14 17:42:54,031 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:42:54,031 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:42:54,044 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-14 17:42:54,234 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 [2024-10-14 17:42:54,235 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)] === [2024-10-14 17:42:54,235 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:42:54,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1963753128, now seen corresponding path program 1 times [2024-10-14 17:42:54,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:42:54,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244140234] [2024-10-14 17:42:54,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:42:54,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:42:54,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:42:54,301 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 17:42:54,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:42:54,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244140234] [2024-10-14 17:42:54,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244140234] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:42:54,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 17:42:54,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-14 17:42:54,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720828184] [2024-10-14 17:42:54,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:42:54,302 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 17:42:54,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:42:54,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 17:42:54,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-14 17:42:54,303 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) [2024-10-14 17:42:54,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:42:54,318 INFO L93 Difference]: Finished difference Result 55 states and 66 transitions. [2024-10-14 17:42:54,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 17:42:54,318 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 [2024-10-14 17:42:54,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:42:54,319 INFO L225 Difference]: With dead ends: 55 [2024-10-14 17:42:54,319 INFO L226 Difference]: Without dead ends: 55 [2024-10-14 17:42:54,319 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 [2024-10-14 17:42:54,319 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 [2024-10-14 17:42:54,320 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] [2024-10-14 17:42:54,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-10-14 17:42:54,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2024-10-14 17:42:54,321 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) [2024-10-14 17:42:54,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 66 transitions. [2024-10-14 17:42:54,322 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 66 transitions. Word has length 12 [2024-10-14 17:42:54,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:42:54,322 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 66 transitions. [2024-10-14 17:42:54,322 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) [2024-10-14 17:42:54,322 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 66 transitions. [2024-10-14 17:42:54,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-10-14 17:42:54,322 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:42:54,322 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:42:54,322 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-10-14 17:42:54,323 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)] === [2024-10-14 17:42:54,323 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:42:54,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1630149590, now seen corresponding path program 1 times [2024-10-14 17:42:54,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:42:54,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737948037] [2024-10-14 17:42:54,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:42:54,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:42:54,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:42:54,446 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 17:42:54,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:42:54,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737948037] [2024-10-14 17:42:54,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737948037] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:42:54,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 17:42:54,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-14 17:42:54,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329372160] [2024-10-14 17:42:54,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:42:54,447 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-14 17:42:54,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:42:54,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-14 17:42:54,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-10-14 17:42:54,448 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) [2024-10-14 17:42:54,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:42:54,464 INFO L93 Difference]: Finished difference Result 54 states and 65 transitions. [2024-10-14 17:42:54,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 17:42:54,465 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 [2024-10-14 17:42:54,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:42:54,465 INFO L225 Difference]: With dead ends: 54 [2024-10-14 17:42:54,465 INFO L226 Difference]: Without dead ends: 54 [2024-10-14 17:42:54,465 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 [2024-10-14 17:42:54,466 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 [2024-10-14 17:42:54,466 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] [2024-10-14 17:42:54,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-10-14 17:42:54,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 41. [2024-10-14 17:42:54,467 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) [2024-10-14 17:42:54,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 50 transitions. [2024-10-14 17:42:54,468 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 50 transitions. Word has length 12 [2024-10-14 17:42:54,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:42:54,468 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 50 transitions. [2024-10-14 17:42:54,468 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) [2024-10-14 17:42:54,472 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 50 transitions. [2024-10-14 17:42:54,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-10-14 17:42:54,472 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:42:54,472 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:42:54,472 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-10-14 17:42:54,473 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)] === [2024-10-14 17:42:54,474 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:42:54,474 INFO L85 PathProgramCache]: Analyzing trace with hash 746804829, now seen corresponding path program 1 times [2024-10-14 17:42:54,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:42:54,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948926770] [2024-10-14 17:42:54,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:42:54,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:42:54,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:42:54,543 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:42:54,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:42:54,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948926770] [2024-10-14 17:42:54,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948926770] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:42:54,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043599940] [2024-10-14 17:42:54,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:42:54,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:42:54,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:42:54,546 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) [2024-10-14 17:42:54,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-14 17:42:54,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:42:54,598 INFO L255 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-14 17:42:54,600 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:42:54,653 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:42:54,653 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:42:54,676 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 [2024-10-14 17:42:54,718 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:42:54,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043599940] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:42:54,718 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:42:54,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-10-14 17:42:54,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7963902] [2024-10-14 17:42:54,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:42:54,719 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-14 17:42:54,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:42:54,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-14 17:42:54,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2024-10-14 17:42:54,719 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) [2024-10-14 17:42:54,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:42:54,783 INFO L93 Difference]: Finished difference Result 60 states and 71 transitions. [2024-10-14 17:42:54,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-14 17:42:54,784 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 [2024-10-14 17:42:54,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:42:54,784 INFO L225 Difference]: With dead ends: 60 [2024-10-14 17:42:54,784 INFO L226 Difference]: Without dead ends: 60 [2024-10-14 17:42:54,785 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 [2024-10-14 17:42:54,785 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 17 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 17:42:54,786 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 140 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 17:42:54,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-10-14 17:42:54,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2024-10-14 17:42:54,788 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) [2024-10-14 17:42:54,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 70 transitions. [2024-10-14 17:42:54,788 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 70 transitions. Word has length 13 [2024-10-14 17:42:54,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:42:54,788 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 70 transitions. [2024-10-14 17:42:54,789 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) [2024-10-14 17:42:54,789 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 70 transitions. [2024-10-14 17:42:54,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-10-14 17:42:54,789 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:42:54,789 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:42:54,806 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-14 17:42:54,990 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 [2024-10-14 17:42:54,990 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)] === [2024-10-14 17:42:54,991 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:42:54,991 INFO L85 PathProgramCache]: Analyzing trace with hash 353777819, now seen corresponding path program 1 times [2024-10-14 17:42:54,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:42:54,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822508104] [2024-10-14 17:42:54,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:42:54,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:42:54,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:42:55,068 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:42:55,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:42:55,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822508104] [2024-10-14 17:42:55,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822508104] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:42:55,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803387146] [2024-10-14 17:42:55,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:42:55,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:42:55,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:42:55,073 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) [2024-10-14 17:42:55,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-14 17:42:55,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:42:55,128 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-14 17:42:55,129 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:42:55,211 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:42:55,211 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:42:55,242 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-10-14 17:42:55,315 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:42:55,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803387146] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:42:55,315 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:42:55,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2024-10-14 17:42:55,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904149344] [2024-10-14 17:42:55,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:42:55,315 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-14 17:42:55,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:42:55,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-14 17:42:55,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2024-10-14 17:42:55,316 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) [2024-10-14 17:42:55,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:42:55,591 INFO L93 Difference]: Finished difference Result 63 states and 74 transitions. [2024-10-14 17:42:55,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-14 17:42:55,591 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 [2024-10-14 17:42:55,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:42:55,592 INFO L225 Difference]: With dead ends: 63 [2024-10-14 17:42:55,592 INFO L226 Difference]: Without dead ends: 63 [2024-10-14 17:42:55,592 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=188, Invalid=462, Unknown=0, NotChecked=0, Total=650 [2024-10-14 17:42:55,592 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 [2024-10-14 17:42:55,592 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] [2024-10-14 17:42:55,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-10-14 17:42:55,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 53. [2024-10-14 17:42:55,594 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) [2024-10-14 17:42:55,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 64 transitions. [2024-10-14 17:42:55,598 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 64 transitions. Word has length 13 [2024-10-14 17:42:55,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:42:55,598 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 64 transitions. [2024-10-14 17:42:55,598 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) [2024-10-14 17:42:55,598 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 64 transitions. [2024-10-14 17:42:55,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-10-14 17:42:55,599 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:42:55,599 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:42:55,612 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-14 17:42:55,800 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 [2024-10-14 17:42:55,800 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)] === [2024-10-14 17:42:55,801 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:42:55,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1054842397, now seen corresponding path program 1 times [2024-10-14 17:42:55,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:42:55,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129221905] [2024-10-14 17:42:55,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:42:55,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:42:55,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:42:55,918 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:42:55,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:42:55,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129221905] [2024-10-14 17:42:55,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129221905] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:42:55,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127919091] [2024-10-14 17:42:55,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:42:55,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:42:55,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:42:55,920 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) [2024-10-14 17:42:55,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-14 17:42:55,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:42:55,974 INFO L255 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-14 17:42:55,978 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:42:56,116 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:42:56,117 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 17:42:56,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127919091] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:42:56,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-14 17:42:56,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 9 [2024-10-14 17:42:56,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337140400] [2024-10-14 17:42:56,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:42:56,118 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-14 17:42:56,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:42:56,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-14 17:42:56,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-10-14 17:42:56,118 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) [2024-10-14 17:42:56,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:42:56,261 INFO L93 Difference]: Finished difference Result 54 states and 65 transitions. [2024-10-14 17:42:56,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-14 17:42:56,262 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 [2024-10-14 17:42:56,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:42:56,262 INFO L225 Difference]: With dead ends: 54 [2024-10-14 17:42:56,262 INFO L226 Difference]: Without dead ends: 54 [2024-10-14 17:42:56,262 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 [2024-10-14 17:42:56,263 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 23 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 17:42:56,263 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 83 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 17:42:56,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-10-14 17:42:56,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 40. [2024-10-14 17:42:56,264 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) [2024-10-14 17:42:56,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2024-10-14 17:42:56,265 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 13 [2024-10-14 17:42:56,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:42:56,265 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2024-10-14 17:42:56,265 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) [2024-10-14 17:42:56,265 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2024-10-14 17:42:56,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-10-14 17:42:56,265 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:42:56,265 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:42:56,278 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-14 17:42:56,466 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 [2024-10-14 17:42:56,466 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)] === [2024-10-14 17:42:56,467 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:42:56,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1676114719, now seen corresponding path program 1 times [2024-10-14 17:42:56,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:42:56,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193330135] [2024-10-14 17:42:56,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:42:56,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:42:56,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:42:56,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:42:56,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:42:56,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193330135] [2024-10-14 17:42:56,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193330135] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:42:56,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 17:42:56,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-14 17:42:56,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277532186] [2024-10-14 17:42:56,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:42:56,503 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 17:42:56,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:42:56,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 17:42:56,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 17:42:56,504 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) [2024-10-14 17:42:56,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:42:56,541 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2024-10-14 17:42:56,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 17:42:56,542 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 [2024-10-14 17:42:56,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:42:56,542 INFO L225 Difference]: With dead ends: 39 [2024-10-14 17:42:56,542 INFO L226 Difference]: Without dead ends: 39 [2024-10-14 17:42:56,542 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 [2024-10-14 17:42:56,543 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 [2024-10-14 17:42:56,543 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] [2024-10-14 17:42:56,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-10-14 17:42:56,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2024-10-14 17:42:56,544 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) [2024-10-14 17:42:56,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions. [2024-10-14 17:42:56,544 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 48 transitions. Word has length 14 [2024-10-14 17:42:56,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:42:56,544 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 48 transitions. [2024-10-14 17:42:56,545 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) [2024-10-14 17:42:56,545 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 48 transitions. [2024-10-14 17:42:56,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-10-14 17:42:56,545 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:42:56,545 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:42:56,545 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-10-14 17:42:56,545 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)] === [2024-10-14 17:42:56,546 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:42:56,546 INFO L85 PathProgramCache]: Analyzing trace with hash 1676114720, now seen corresponding path program 1 times [2024-10-14 17:42:56,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:42:56,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013623708] [2024-10-14 17:42:56,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:42:56,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:42:56,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:42:56,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:42:56,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:42:56,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013623708] [2024-10-14 17:42:56,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013623708] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:42:56,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280778172] [2024-10-14 17:42:56,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:42:56,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:42:56,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:42:56,624 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) [2024-10-14 17:42:56,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-14 17:42:56,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:42:56,674 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-14 17:42:56,675 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:42:56,682 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 [2024-10-14 17:42:56,761 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:42:56,761 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:42:56,825 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:42:56,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280778172] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-14 17:42:56,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-10-14 17:42:56,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 11 [2024-10-14 17:42:56,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193866063] [2024-10-14 17:42:56,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:42:56,825 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-14 17:42:56,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:42:56,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-14 17:42:56,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2024-10-14 17:42:56,826 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) [2024-10-14 17:42:56,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:42:56,879 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2024-10-14 17:42:56,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-14 17:42:56,880 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 [2024-10-14 17:42:56,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:42:56,880 INFO L225 Difference]: With dead ends: 42 [2024-10-14 17:42:56,880 INFO L226 Difference]: Without dead ends: 42 [2024-10-14 17:42:56,880 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 [2024-10-14 17:42:56,881 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 [2024-10-14 17:42:56,881 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] [2024-10-14 17:42:56,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-10-14 17:42:56,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2024-10-14 17:42:56,882 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) [2024-10-14 17:42:56,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2024-10-14 17:42:56,882 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 14 [2024-10-14 17:42:56,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:42:56,882 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2024-10-14 17:42:56,882 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) [2024-10-14 17:42:56,883 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2024-10-14 17:42:56,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-10-14 17:42:56,883 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:42:56,883 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:42:56,896 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-14 17:42:57,087 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 [2024-10-14 17:42:57,088 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)] === [2024-10-14 17:42:57,089 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:42:57,089 INFO L85 PathProgramCache]: Analyzing trace with hash 133510553, now seen corresponding path program 1 times [2024-10-14 17:42:57,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:42:57,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60623694] [2024-10-14 17:42:57,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:42:57,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:42:57,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:42:57,277 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 17:42:57,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:42:57,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60623694] [2024-10-14 17:42:57,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60623694] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:42:57,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724310358] [2024-10-14 17:42:57,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:42:57,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:42:57,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:42:57,280 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) [2024-10-14 17:42:57,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-14 17:42:57,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:42:57,337 INFO L255 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-14 17:42:57,338 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:42:57,358 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 [2024-10-14 17:42:57,377 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 17:42:57,377 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 17:42:57,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724310358] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:42:57,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-14 17:42:57,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 11 [2024-10-14 17:42:57,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745749159] [2024-10-14 17:42:57,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:42:57,378 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-14 17:42:57,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:42:57,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-14 17:42:57,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-10-14 17:42:57,379 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) [2024-10-14 17:42:57,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:42:57,415 INFO L93 Difference]: Finished difference Result 61 states and 72 transitions. [2024-10-14 17:42:57,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 17:42:57,415 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 [2024-10-14 17:42:57,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:42:57,417 INFO L225 Difference]: With dead ends: 61 [2024-10-14 17:42:57,417 INFO L226 Difference]: Without dead ends: 61 [2024-10-14 17:42:57,418 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 [2024-10-14 17:42:57,418 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 [2024-10-14 17:42:57,418 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] [2024-10-14 17:42:57,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-10-14 17:42:57,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2024-10-14 17:42:57,419 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) [2024-10-14 17:42:57,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 71 transitions. [2024-10-14 17:42:57,419 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 71 transitions. Word has length 16 [2024-10-14 17:42:57,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:42:57,420 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 71 transitions. [2024-10-14 17:42:57,420 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) [2024-10-14 17:42:57,420 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 71 transitions. [2024-10-14 17:42:57,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-10-14 17:42:57,420 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:42:57,420 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:42:57,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-10-14 17:42:57,625 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 [2024-10-14 17:42:57,626 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)] === [2024-10-14 17:42:57,626 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:42:57,626 INFO L85 PathProgramCache]: Analyzing trace with hash -453295461, now seen corresponding path program 1 times [2024-10-14 17:42:57,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:42:57,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555844556] [2024-10-14 17:42:57,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:42:57,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:42:57,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:42:57,844 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 17:42:57,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:42:57,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555844556] [2024-10-14 17:42:57,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555844556] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:42:57,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818920382] [2024-10-14 17:42:57,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:42:57,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:42:57,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:42:57,848 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) [2024-10-14 17:42:57,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-14 17:42:57,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:42:57,905 INFO L255 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-14 17:42:57,906 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:42:57,978 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 [2024-10-14 17:42:57,996 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 17:42:57,996 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 17:42:57,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818920382] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:42:57,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-14 17:42:57,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 14 [2024-10-14 17:42:57,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162478489] [2024-10-14 17:42:57,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:42:57,997 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-14 17:42:57,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:42:57,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-14 17:42:57,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2024-10-14 17:42:57,997 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) [2024-10-14 17:42:58,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:42:58,058 INFO L93 Difference]: Finished difference Result 66 states and 77 transitions. [2024-10-14 17:42:58,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-14 17:42:58,059 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 [2024-10-14 17:42:58,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:42:58,059 INFO L225 Difference]: With dead ends: 66 [2024-10-14 17:42:58,059 INFO L226 Difference]: Without dead ends: 66 [2024-10-14 17:42:58,060 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 [2024-10-14 17:42:58,060 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 47 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 17:42:58,060 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 88 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 17:42:58,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-10-14 17:42:58,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2024-10-14 17:42:58,061 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) [2024-10-14 17:42:58,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2024-10-14 17:42:58,061 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 16 [2024-10-14 17:42:58,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:42:58,061 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2024-10-14 17:42:58,061 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) [2024-10-14 17:42:58,062 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2024-10-14 17:42:58,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-10-14 17:42:58,062 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:42:58,062 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:42:58,075 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-14 17:42:58,262 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 [2024-10-14 17:42:58,262 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)] === [2024-10-14 17:42:58,263 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:42:58,263 INFO L85 PathProgramCache]: Analyzing trace with hash -1464412711, now seen corresponding path program 1 times [2024-10-14 17:42:58,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:42:58,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040436980] [2024-10-14 17:42:58,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:42:58,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:42:58,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:42:58,555 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 17:42:58,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:42:58,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040436980] [2024-10-14 17:42:58,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040436980] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:42:58,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062876048] [2024-10-14 17:42:58,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:42:58,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:42:58,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:42:58,557 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) [2024-10-14 17:42:58,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-14 17:42:58,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:42:58,611 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-10-14 17:42:58,612 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:42:58,711 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 [2024-10-14 17:42:58,743 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:42:58,744 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:42:58,750 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 [2024-10-14 17:42:58,751 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 [2024-10-14 17:42:58,839 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:42:58,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062876048] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:42:58,839 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:42:58,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 10] total 21 [2024-10-14 17:42:58,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685153101] [2024-10-14 17:42:58,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:42:58,840 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-14 17:42:58,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:42:58,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-14 17:42:58,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2024-10-14 17:42:58,840 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) [2024-10-14 17:42:59,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:42:59,260 INFO L93 Difference]: Finished difference Result 85 states and 101 transitions. [2024-10-14 17:42:59,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-14 17:42:59,260 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 [2024-10-14 17:42:59,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:42:59,261 INFO L225 Difference]: With dead ends: 85 [2024-10-14 17:42:59,261 INFO L226 Difference]: Without dead ends: 85 [2024-10-14 17:42:59,262 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 [2024-10-14 17:42:59,262 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 [2024-10-14 17:42:59,262 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] [2024-10-14 17:42:59,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2024-10-14 17:42:59,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 58. [2024-10-14 17:42:59,263 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) [2024-10-14 17:42:59,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 71 transitions. [2024-10-14 17:42:59,263 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 71 transitions. Word has length 16 [2024-10-14 17:42:59,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:42:59,264 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 71 transitions. [2024-10-14 17:42:59,264 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) [2024-10-14 17:42:59,264 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 71 transitions. [2024-10-14 17:42:59,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-10-14 17:42:59,264 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:42:59,264 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:42:59,282 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-10-14 17:42:59,469 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 [2024-10-14 17:42:59,470 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)] === [2024-10-14 17:42:59,470 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:42:59,470 INFO L85 PathProgramCache]: Analyzing trace with hash -156141614, now seen corresponding path program 1 times [2024-10-14 17:42:59,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:42:59,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722278130] [2024-10-14 17:42:59,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:42:59,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:42:59,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:42:59,510 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 17:42:59,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:42:59,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722278130] [2024-10-14 17:42:59,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722278130] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:42:59,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 17:42:59,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-14 17:42:59,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158147852] [2024-10-14 17:42:59,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:42:59,511 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-14 17:42:59,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:42:59,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-14 17:42:59,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-14 17:42:59,511 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) [2024-10-14 17:42:59,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:42:59,539 INFO L93 Difference]: Finished difference Result 57 states and 70 transitions. [2024-10-14 17:42:59,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 17:42:59,539 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 [2024-10-14 17:42:59,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:42:59,540 INFO L225 Difference]: With dead ends: 57 [2024-10-14 17:42:59,540 INFO L226 Difference]: Without dead ends: 57 [2024-10-14 17:42:59,540 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 [2024-10-14 17:42:59,541 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 [2024-10-14 17:42:59,541 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] [2024-10-14 17:42:59,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-10-14 17:42:59,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2024-10-14 17:42:59,544 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) [2024-10-14 17:42:59,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 70 transitions. [2024-10-14 17:42:59,544 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 70 transitions. Word has length 17 [2024-10-14 17:42:59,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:42:59,544 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 70 transitions. [2024-10-14 17:42:59,544 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) [2024-10-14 17:42:59,544 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 70 transitions. [2024-10-14 17:42:59,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-10-14 17:42:59,546 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:42:59,546 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:42:59,546 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-10-14 17:42:59,546 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)] === [2024-10-14 17:42:59,546 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:42:59,547 INFO L85 PathProgramCache]: Analyzing trace with hash -156141613, now seen corresponding path program 1 times [2024-10-14 17:42:59,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:42:59,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353539098] [2024-10-14 17:42:59,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:42:59,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:42:59,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:42:59,642 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 17:42:59,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:42:59,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353539098] [2024-10-14 17:42:59,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353539098] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:42:59,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 17:42:59,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-14 17:42:59,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097427898] [2024-10-14 17:42:59,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:42:59,643 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-14 17:42:59,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:42:59,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-14 17:42:59,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-10-14 17:42:59,644 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) [2024-10-14 17:42:59,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:42:59,700 INFO L93 Difference]: Finished difference Result 77 states and 95 transitions. [2024-10-14 17:42:59,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-14 17:42:59,700 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 [2024-10-14 17:42:59,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:42:59,701 INFO L225 Difference]: With dead ends: 77 [2024-10-14 17:42:59,701 INFO L226 Difference]: Without dead ends: 77 [2024-10-14 17:42:59,701 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 [2024-10-14 17:42:59,701 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 [2024-10-14 17:42:59,702 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] [2024-10-14 17:42:59,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-10-14 17:42:59,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 59. [2024-10-14 17:42:59,703 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) [2024-10-14 17:42:59,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 72 transitions. [2024-10-14 17:42:59,703 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 72 transitions. Word has length 17 [2024-10-14 17:42:59,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:42:59,703 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 72 transitions. [2024-10-14 17:42:59,703 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) [2024-10-14 17:42:59,703 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 72 transitions. [2024-10-14 17:42:59,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-10-14 17:42:59,704 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:42:59,704 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:42:59,704 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-10-14 17:42:59,704 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)] === [2024-10-14 17:42:59,705 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:42:59,705 INFO L85 PathProgramCache]: Analyzing trace with hash -545422677, now seen corresponding path program 1 times [2024-10-14 17:42:59,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:42:59,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634076732] [2024-10-14 17:42:59,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:42:59,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:42:59,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:42:59,744 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:42:59,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:42:59,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634076732] [2024-10-14 17:42:59,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634076732] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:42:59,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 17:42:59,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-14 17:42:59,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557678409] [2024-10-14 17:42:59,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:42:59,745 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-14 17:42:59,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:42:59,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-14 17:42:59,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-14 17:42:59,746 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) [2024-10-14 17:42:59,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:42:59,777 INFO L93 Difference]: Finished difference Result 58 states and 71 transitions. [2024-10-14 17:42:59,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 17:42:59,778 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 [2024-10-14 17:42:59,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:42:59,778 INFO L225 Difference]: With dead ends: 58 [2024-10-14 17:42:59,778 INFO L226 Difference]: Without dead ends: 58 [2024-10-14 17:42:59,778 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 [2024-10-14 17:42:59,779 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 [2024-10-14 17:42:59,779 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] [2024-10-14 17:42:59,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-10-14 17:42:59,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2024-10-14 17:42:59,780 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) [2024-10-14 17:42:59,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 71 transitions. [2024-10-14 17:42:59,781 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 71 transitions. Word has length 18 [2024-10-14 17:42:59,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:42:59,781 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 71 transitions. [2024-10-14 17:42:59,781 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) [2024-10-14 17:42:59,781 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 71 transitions. [2024-10-14 17:42:59,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-10-14 17:42:59,782 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:42:59,782 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:42:59,782 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-10-14 17:42:59,782 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)] === [2024-10-14 17:42:59,782 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:42:59,782 INFO L85 PathProgramCache]: Analyzing trace with hash -545422676, now seen corresponding path program 1 times [2024-10-14 17:42:59,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:42:59,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236803634] [2024-10-14 17:42:59,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:42:59,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:42:59,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:42:59,872 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 17:42:59,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:42:59,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236803634] [2024-10-14 17:42:59,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236803634] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:42:59,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 17:42:59,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-14 17:42:59,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540954552] [2024-10-14 17:42:59,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:42:59,873 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-14 17:42:59,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:42:59,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-14 17:42:59,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-10-14 17:42:59,874 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) [2024-10-14 17:42:59,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:42:59,899 INFO L93 Difference]: Finished difference Result 61 states and 74 transitions. [2024-10-14 17:42:59,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 17:42:59,900 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 [2024-10-14 17:42:59,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:42:59,900 INFO L225 Difference]: With dead ends: 61 [2024-10-14 17:42:59,900 INFO L226 Difference]: Without dead ends: 61 [2024-10-14 17:42:59,900 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 [2024-10-14 17:42:59,901 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 [2024-10-14 17:42:59,901 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] [2024-10-14 17:42:59,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-10-14 17:42:59,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2024-10-14 17:42:59,903 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) [2024-10-14 17:42:59,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 74 transitions. [2024-10-14 17:42:59,904 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 74 transitions. Word has length 18 [2024-10-14 17:42:59,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:42:59,904 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 74 transitions. [2024-10-14 17:42:59,904 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) [2024-10-14 17:42:59,904 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 74 transitions. [2024-10-14 17:42:59,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-10-14 17:42:59,904 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:42:59,904 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:42:59,904 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-10-14 17:42:59,905 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)] === [2024-10-14 17:42:59,905 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:42:59,905 INFO L85 PathProgramCache]: Analyzing trace with hash 436526993, now seen corresponding path program 2 times [2024-10-14 17:42:59,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:42:59,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742193410] [2024-10-14 17:42:59,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:42:59,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:42:59,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:43:00,132 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:43:00,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:43:00,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742193410] [2024-10-14 17:43:00,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742193410] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:43:00,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027084350] [2024-10-14 17:43:00,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 17:43:00,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:43:00,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:43:00,134 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) [2024-10-14 17:43:00,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-14 17:43:00,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 17:43:00,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 17:43:00,222 INFO L255 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-10-14 17:43:00,224 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:43:00,352 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 [2024-10-14 17:43:00,480 INFO L349 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2024-10-14 17:43:00,483 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 [2024-10-14 17:43:00,506 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:43:00,507 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:43:00,573 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 [2024-10-14 17:43:00,579 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 17:43:00,579 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 [2024-10-14 17:43:00,747 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:43:00,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027084350] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:43:00,748 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:43:00,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13] total 30 [2024-10-14 17:43:00,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609930590] [2024-10-14 17:43:00,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:43:00,748 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-10-14 17:43:00,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:43:00,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-10-14 17:43:00,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=771, Unknown=0, NotChecked=0, Total=870 [2024-10-14 17:43:00,749 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) [2024-10-14 17:43:01,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:43:01,628 INFO L93 Difference]: Finished difference Result 108 states and 129 transitions. [2024-10-14 17:43:01,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-10-14 17:43:01,628 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 [2024-10-14 17:43:01,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:43:01,629 INFO L225 Difference]: With dead ends: 108 [2024-10-14 17:43:01,629 INFO L226 Difference]: Without dead ends: 108 [2024-10-14 17:43:01,630 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=390, Invalid=2262, Unknown=0, NotChecked=0, Total=2652 [2024-10-14 17:43:01,630 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 [2024-10-14 17:43:01,631 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] [2024-10-14 17:43:01,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2024-10-14 17:43:01,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 72. [2024-10-14 17:43:01,633 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) [2024-10-14 17:43:01,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 88 transitions. [2024-10-14 17:43:01,634 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 88 transitions. Word has length 20 [2024-10-14 17:43:01,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:43:01,634 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 88 transitions. [2024-10-14 17:43:01,634 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) [2024-10-14 17:43:01,634 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 88 transitions. [2024-10-14 17:43:01,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-10-14 17:43:01,634 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:43:01,634 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] [2024-10-14 17:43:01,650 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-10-14 17:43:01,835 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 [2024-10-14 17:43:01,835 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)] === [2024-10-14 17:43:01,835 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:43:01,836 INFO L85 PathProgramCache]: Analyzing trace with hash -825623727, now seen corresponding path program 1 times [2024-10-14 17:43:01,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:43:01,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384581000] [2024-10-14 17:43:01,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:43:01,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:43:01,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:43:01,934 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 17:43:01,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:43:01,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384581000] [2024-10-14 17:43:01,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384581000] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:43:01,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 17:43:01,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 17:43:01,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446781173] [2024-10-14 17:43:01,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:43:01,935 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 17:43:01,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:43:01,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 17:43:01,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 17:43:01,935 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) [2024-10-14 17:43:01,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:43:01,956 INFO L93 Difference]: Finished difference Result 71 states and 87 transitions. [2024-10-14 17:43:01,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 17:43:01,957 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 [2024-10-14 17:43:01,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:43:01,957 INFO L225 Difference]: With dead ends: 71 [2024-10-14 17:43:01,957 INFO L226 Difference]: Without dead ends: 69 [2024-10-14 17:43:01,957 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 [2024-10-14 17:43:01,957 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 [2024-10-14 17:43:01,957 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] [2024-10-14 17:43:01,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-10-14 17:43:01,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2024-10-14 17:43:01,958 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) [2024-10-14 17:43:01,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 85 transitions. [2024-10-14 17:43:01,958 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 85 transitions. Word has length 21 [2024-10-14 17:43:01,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:43:01,959 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 85 transitions. [2024-10-14 17:43:01,959 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) [2024-10-14 17:43:01,959 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 85 transitions. [2024-10-14 17:43:01,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-10-14 17:43:01,959 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:43:01,959 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] [2024-10-14 17:43:01,959 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-10-14 17:43:01,959 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)] === [2024-10-14 17:43:01,959 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:43:01,959 INFO L85 PathProgramCache]: Analyzing trace with hash -825622565, now seen corresponding path program 1 times [2024-10-14 17:43:01,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:43:01,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874428739] [2024-10-14 17:43:01,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:43:01,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:43:01,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:43:02,046 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 17:43:02,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:43:02,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874428739] [2024-10-14 17:43:02,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874428739] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:43:02,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 17:43:02,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-10-14 17:43:02,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765345456] [2024-10-14 17:43:02,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:43:02,047 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-14 17:43:02,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:43:02,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-14 17:43:02,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-10-14 17:43:02,048 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) [2024-10-14 17:43:02,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:43:02,087 INFO L93 Difference]: Finished difference Result 119 states and 143 transitions. [2024-10-14 17:43:02,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-14 17:43:02,088 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 [2024-10-14 17:43:02,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:43:02,088 INFO L225 Difference]: With dead ends: 119 [2024-10-14 17:43:02,088 INFO L226 Difference]: Without dead ends: 97 [2024-10-14 17:43:02,088 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 [2024-10-14 17:43:02,089 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 [2024-10-14 17:43:02,089 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] [2024-10-14 17:43:02,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2024-10-14 17:43:02,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2024-10-14 17:43:02,090 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) [2024-10-14 17:43:02,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 114 transitions. [2024-10-14 17:43:02,090 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 114 transitions. Word has length 21 [2024-10-14 17:43:02,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:43:02,090 INFO L471 AbstractCegarLoop]: Abstraction has 95 states and 114 transitions. [2024-10-14 17:43:02,091 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) [2024-10-14 17:43:02,091 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 114 transitions. [2024-10-14 17:43:02,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-10-14 17:43:02,091 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:43:02,091 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] [2024-10-14 17:43:02,091 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-10-14 17:43:02,091 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)] === [2024-10-14 17:43:02,091 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:43:02,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1643271015, now seen corresponding path program 1 times [2024-10-14 17:43:02,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:43:02,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046331289] [2024-10-14 17:43:02,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:43:02,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:43:02,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:43:02,207 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 17:43:02,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:43:02,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046331289] [2024-10-14 17:43:02,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046331289] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:43:02,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 17:43:02,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-10-14 17:43:02,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486095455] [2024-10-14 17:43:02,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:43:02,208 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-14 17:43:02,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:43:02,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-14 17:43:02,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-10-14 17:43:02,208 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) [2024-10-14 17:43:02,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:43:02,281 INFO L93 Difference]: Finished difference Result 104 states and 122 transitions. [2024-10-14 17:43:02,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-14 17:43:02,281 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 [2024-10-14 17:43:02,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:43:02,281 INFO L225 Difference]: With dead ends: 104 [2024-10-14 17:43:02,281 INFO L226 Difference]: Without dead ends: 88 [2024-10-14 17:43:02,282 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-10-14 17:43:02,282 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 [2024-10-14 17:43:02,282 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] [2024-10-14 17:43:02,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-10-14 17:43:02,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2024-10-14 17:43:02,284 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) [2024-10-14 17:43:02,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 105 transitions. [2024-10-14 17:43:02,284 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 105 transitions. Word has length 21 [2024-10-14 17:43:02,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:43:02,284 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 105 transitions. [2024-10-14 17:43:02,284 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) [2024-10-14 17:43:02,284 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 105 transitions. [2024-10-14 17:43:02,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-10-14 17:43:02,284 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:43:02,285 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] [2024-10-14 17:43:02,285 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-10-14 17:43:02,285 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)] === [2024-10-14 17:43:02,285 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:43:02,285 INFO L85 PathProgramCache]: Analyzing trace with hash 962752539, now seen corresponding path program 1 times [2024-10-14 17:43:02,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:43:02,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848161801] [2024-10-14 17:43:02,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:43:02,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:43:02,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:43:02,400 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 17:43:02,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:43:02,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848161801] [2024-10-14 17:43:02,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848161801] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:43:02,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 17:43:02,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-10-14 17:43:02,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422236088] [2024-10-14 17:43:02,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:43:02,401 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-14 17:43:02,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:43:02,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-14 17:43:02,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-10-14 17:43:02,402 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) [2024-10-14 17:43:02,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:43:02,445 INFO L93 Difference]: Finished difference Result 135 states and 161 transitions. [2024-10-14 17:43:02,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-14 17:43:02,446 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 [2024-10-14 17:43:02,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:43:02,446 INFO L225 Difference]: With dead ends: 135 [2024-10-14 17:43:02,446 INFO L226 Difference]: Without dead ends: 122 [2024-10-14 17:43:02,446 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 [2024-10-14 17:43:02,447 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 [2024-10-14 17:43:02,447 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] [2024-10-14 17:43:02,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2024-10-14 17:43:02,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 90. [2024-10-14 17:43:02,448 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) [2024-10-14 17:43:02,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 108 transitions. [2024-10-14 17:43:02,448 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 108 transitions. Word has length 21 [2024-10-14 17:43:02,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:43:02,448 INFO L471 AbstractCegarLoop]: Abstraction has 90 states and 108 transitions. [2024-10-14 17:43:02,448 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) [2024-10-14 17:43:02,448 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 108 transitions. [2024-10-14 17:43:02,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-10-14 17:43:02,448 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:43:02,449 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:43:02,449 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-10-14 17:43:02,449 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)] === [2024-10-14 17:43:02,449 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:43:02,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1404399964, now seen corresponding path program 1 times [2024-10-14 17:43:02,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:43:02,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526380712] [2024-10-14 17:43:02,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:43:02,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:43:02,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:43:02,562 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:43:02,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:43:02,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526380712] [2024-10-14 17:43:02,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526380712] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:43:02,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027163875] [2024-10-14 17:43:02,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:43:02,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:43:02,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:43:02,565 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) [2024-10-14 17:43:02,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-14 17:43:02,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:43:02,626 INFO L255 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-10-14 17:43:02,627 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:43:02,630 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 [2024-10-14 17:43:02,686 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:43:02,686 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:43:02,804 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:43:02,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027163875] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:43:02,805 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:43:02,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2024-10-14 17:43:02,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048093929] [2024-10-14 17:43:02,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:43:02,806 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-14 17:43:02,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:43:02,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-14 17:43:02,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2024-10-14 17:43:02,806 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) [2024-10-14 17:43:02,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:43:02,958 INFO L93 Difference]: Finished difference Result 112 states and 129 transitions. [2024-10-14 17:43:02,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-14 17:43:02,958 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 [2024-10-14 17:43:02,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:43:02,959 INFO L225 Difference]: With dead ends: 112 [2024-10-14 17:43:02,959 INFO L226 Difference]: Without dead ends: 99 [2024-10-14 17:43:02,959 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 [2024-10-14 17:43:02,959 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 [2024-10-14 17:43:02,960 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] [2024-10-14 17:43:02,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2024-10-14 17:43:02,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 89. [2024-10-14 17:43:02,961 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) [2024-10-14 17:43:02,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 106 transitions. [2024-10-14 17:43:02,961 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 106 transitions. Word has length 22 [2024-10-14 17:43:02,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:43:02,961 INFO L471 AbstractCegarLoop]: Abstraction has 89 states and 106 transitions. [2024-10-14 17:43:02,961 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) [2024-10-14 17:43:02,962 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 106 transitions. [2024-10-14 17:43:02,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-10-14 17:43:02,962 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:43:02,962 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] [2024-10-14 17:43:02,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-10-14 17:43:03,166 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 [2024-10-14 17:43:03,167 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)] === [2024-10-14 17:43:03,167 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:43:03,167 INFO L85 PathProgramCache]: Analyzing trace with hash -781497654, now seen corresponding path program 1 times [2024-10-14 17:43:03,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:43:03,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599485791] [2024-10-14 17:43:03,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:43:03,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:43:03,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:43:03,224 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 17:43:03,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:43:03,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599485791] [2024-10-14 17:43:03,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599485791] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:43:03,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865184277] [2024-10-14 17:43:03,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:43:03,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:43:03,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:43:03,230 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) [2024-10-14 17:43:03,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-14 17:43:03,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:43:03,294 INFO L255 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-14 17:43:03,294 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:43:03,327 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 17:43:03,328 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:43:03,362 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 17:43:03,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865184277] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:43:03,362 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:43:03,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2024-10-14 17:43:03,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884902323] [2024-10-14 17:43:03,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:43:03,363 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-14 17:43:03,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:43:03,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-14 17:43:03,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2024-10-14 17:43:03,364 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) [2024-10-14 17:43:03,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:43:03,489 INFO L93 Difference]: Finished difference Result 89 states and 104 transitions. [2024-10-14 17:43:03,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-14 17:43:03,490 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 [2024-10-14 17:43:03,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:43:03,490 INFO L225 Difference]: With dead ends: 89 [2024-10-14 17:43:03,490 INFO L226 Difference]: Without dead ends: 89 [2024-10-14 17:43:03,491 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 [2024-10-14 17:43:03,491 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 [2024-10-14 17:43:03,491 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] [2024-10-14 17:43:03,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2024-10-14 17:43:03,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 86. [2024-10-14 17:43:03,493 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) [2024-10-14 17:43:03,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 101 transitions. [2024-10-14 17:43:03,493 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 101 transitions. Word has length 23 [2024-10-14 17:43:03,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:43:03,493 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 101 transitions. [2024-10-14 17:43:03,494 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) [2024-10-14 17:43:03,494 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 101 transitions. [2024-10-14 17:43:03,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-10-14 17:43:03,495 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:43:03,495 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:43:03,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-10-14 17:43:03,695 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 [2024-10-14 17:43:03,696 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)] === [2024-10-14 17:43:03,696 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:43:03,696 INFO L85 PathProgramCache]: Analyzing trace with hash 557876169, now seen corresponding path program 3 times [2024-10-14 17:43:03,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:43:03,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143477707] [2024-10-14 17:43:03,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:43:03,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:43:03,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:43:04,338 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:43:04,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:43:04,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143477707] [2024-10-14 17:43:04,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143477707] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:43:04,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590048562] [2024-10-14 17:43:04,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-14 17:43:04,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:43:04,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:43:04,341 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) [2024-10-14 17:43:04,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-14 17:43:04,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-10-14 17:43:04,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 17:43:04,424 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-10-14 17:43:04,425 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:43:04,647 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 [2024-10-14 17:43:04,860 INFO L349 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2024-10-14 17:43:04,861 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 [2024-10-14 17:43:04,881 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:43:04,881 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:43:05,037 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 [2024-10-14 17:43:05,041 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 17:43:05,041 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 [2024-10-14 17:43:05,281 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:43:05,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590048562] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:43:05,281 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:43:05,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 16] total 40 [2024-10-14 17:43:05,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733136912] [2024-10-14 17:43:05,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:43:05,282 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-10-14 17:43:05,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:43:05,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-10-14 17:43:05,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1409, Unknown=0, NotChecked=0, Total=1560 [2024-10-14 17:43:05,283 INFO L87 Difference]: Start difference. First operand 86 states and 101 transitions. Second operand has 40 states, 40 states have (on average 1.6) internal successors, (64), 40 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) [2024-10-14 17:43:07,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:43:07,052 INFO L93 Difference]: Finished difference Result 154 states and 176 transitions. [2024-10-14 17:43:07,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-10-14 17:43:07,053 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.6) internal successors, (64), 40 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) Word has length 24 [2024-10-14 17:43:07,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:43:07,053 INFO L225 Difference]: With dead ends: 154 [2024-10-14 17:43:07,053 INFO L226 Difference]: Without dead ends: 145 [2024-10-14 17:43:07,054 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1164 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=591, Invalid=4101, Unknown=0, NotChecked=0, Total=4692 [2024-10-14 17:43:07,055 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 128 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 1291 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 1304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-14 17:43:07,055 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 329 Invalid, 1304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1291 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-14 17:43:07,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2024-10-14 17:43:07,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 101. [2024-10-14 17:43:07,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 98 states have (on average 1.2244897959183674) internal successors, (120), 100 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) [2024-10-14 17:43:07,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 120 transitions. [2024-10-14 17:43:07,057 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 120 transitions. Word has length 24 [2024-10-14 17:43:07,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:43:07,057 INFO L471 AbstractCegarLoop]: Abstraction has 101 states and 120 transitions. [2024-10-14 17:43:07,057 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.6) internal successors, (64), 40 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) [2024-10-14 17:43:07,057 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 120 transitions. [2024-10-14 17:43:07,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-10-14 17:43:07,057 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:43:07,057 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] [2024-10-14 17:43:07,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-10-14 17:43:07,261 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 [2024-10-14 17:43:07,262 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)] === [2024-10-14 17:43:07,262 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:43:07,262 INFO L85 PathProgramCache]: Analyzing trace with hash -2102248149, now seen corresponding path program 2 times [2024-10-14 17:43:07,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:43:07,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933205054] [2024-10-14 17:43:07,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:43:07,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:43:07,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:43:07,398 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-14 17:43:07,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:43:07,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933205054] [2024-10-14 17:43:07,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933205054] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:43:07,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339325612] [2024-10-14 17:43:07,399 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 17:43:07,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:43:07,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:43:07,402 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) [2024-10-14 17:43:07,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-10-14 17:43:07,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 17:43:07,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 17:43:07,474 INFO L255 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-14 17:43:07,475 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:43:07,540 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-14 17:43:07,540 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:43:07,649 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 [2024-10-14 17:43:07,670 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-14 17:43:07,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339325612] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:43:07,671 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:43:07,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2024-10-14 17:43:07,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105598400] [2024-10-14 17:43:07,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:43:07,671 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-14 17:43:07,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:43:07,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-14 17:43:07,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2024-10-14 17:43:07,672 INFO L87 Difference]: Start difference. First operand 101 states and 120 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) [2024-10-14 17:43:07,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:43:07,797 INFO L93 Difference]: Finished difference Result 108 states and 125 transitions. [2024-10-14 17:43:07,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-14 17:43:07,797 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 [2024-10-14 17:43:07,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:43:07,798 INFO L225 Difference]: With dead ends: 108 [2024-10-14 17:43:07,798 INFO L226 Difference]: Without dead ends: 108 [2024-10-14 17:43:07,798 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 [2024-10-14 17:43:07,798 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 9 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 17:43:07,799 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 181 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 17:43:07,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2024-10-14 17:43:07,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 105. [2024-10-14 17:43:07,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 102 states have (on average 1.2058823529411764) internal successors, (123), 104 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:43:07,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 123 transitions. [2024-10-14 17:43:07,800 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 123 transitions. Word has length 25 [2024-10-14 17:43:07,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:43:07,800 INFO L471 AbstractCegarLoop]: Abstraction has 105 states and 123 transitions. [2024-10-14 17:43:07,800 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) [2024-10-14 17:43:07,800 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 123 transitions. [2024-10-14 17:43:07,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-10-14 17:43:07,801 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:43:07,801 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:43:07,817 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-10-14 17:43:08,004 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 [2024-10-14 17:43:08,005 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)] === [2024-10-14 17:43:08,006 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:43:08,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1738859137, now seen corresponding path program 4 times [2024-10-14 17:43:08,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:43:08,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198962536] [2024-10-14 17:43:08,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:43:08,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:43:08,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:43:08,378 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:43:08,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:43:08,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198962536] [2024-10-14 17:43:08,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198962536] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:43:08,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225038335] [2024-10-14 17:43:08,379 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-14 17:43:08,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:43:08,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:43:08,383 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) [2024-10-14 17:43:08,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-10-14 17:43:08,457 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-14 17:43:08,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 17:43:08,459 INFO L255 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 58 conjuncts are in the unsatisfiable core [2024-10-14 17:43:08,462 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:43:08,496 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 [2024-10-14 17:43:08,941 INFO L349 Elim1Store]: treesize reduction 12, result has 73.3 percent of original size [2024-10-14 17:43:08,942 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 [2024-10-14 17:43:09,000 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-14 17:43:09,000 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:43:09,331 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 [2024-10-14 17:43:09,340 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 [2024-10-14 17:43:09,345 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 [2024-10-14 17:43:09,369 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-14 17:43:09,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225038335] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:43:09,369 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:43:09,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 32 [2024-10-14 17:43:09,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293612475] [2024-10-14 17:43:09,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:43:09,370 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-10-14 17:43:09,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:43:09,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-10-14 17:43:09,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=897, Unknown=0, NotChecked=0, Total=1056 [2024-10-14 17:43:09,370 INFO L87 Difference]: Start difference. First operand 105 states and 123 transitions. Second operand has 33 states, 32 states have (on average 1.75) internal successors, (56), 33 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:43:10,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:43:10,314 INFO L93 Difference]: Finished difference Result 160 states and 180 transitions. [2024-10-14 17:43:10,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-10-14 17:43:10,314 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 1.75) internal successors, (56), 33 states have internal predecessors, (56), 0 states have call successors, (0), 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 [2024-10-14 17:43:10,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:43:10,314 INFO L225 Difference]: With dead ends: 160 [2024-10-14 17:43:10,315 INFO L226 Difference]: Without dead ends: 132 [2024-10-14 17:43:10,315 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=405, Invalid=2247, Unknown=0, NotChecked=0, Total=2652 [2024-10-14 17:43:10,316 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 59 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 906 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 906 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-14 17:43:10,316 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 229 Invalid, 929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 906 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-14 17:43:10,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2024-10-14 17:43:10,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 73. [2024-10-14 17:43:10,319 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) [2024-10-14 17:43:10,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2024-10-14 17:43:10,320 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 28 [2024-10-14 17:43:10,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:43:10,320 INFO L471 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2024-10-14 17:43:10,320 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 1.75) internal successors, (56), 33 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:43:10,320 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2024-10-14 17:43:10,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-10-14 17:43:10,320 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:43:10,320 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] [2024-10-14 17:43:10,332 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-10-14 17:43:10,520 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 [2024-10-14 17:43:10,521 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)] === [2024-10-14 17:43:10,521 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:43:10,521 INFO L85 PathProgramCache]: Analyzing trace with hash 635029455, now seen corresponding path program 1 times [2024-10-14 17:43:10,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:43:10,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838970404] [2024-10-14 17:43:10,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:43:10,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:43:10,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:43:10,836 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 17:43:10,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:43:10,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838970404] [2024-10-14 17:43:10,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838970404] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:43:10,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636451313] [2024-10-14 17:43:10,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:43:10,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:43:10,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:43:10,839 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) [2024-10-14 17:43:10,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-10-14 17:43:10,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:43:10,920 INFO L255 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-10-14 17:43:10,921 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:43:11,053 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 [2024-10-14 17:43:11,082 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-14 17:43:11,082 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:43:11,087 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 [2024-10-14 17:43:11,089 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 [2024-10-14 17:43:11,211 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-14 17:43:11,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636451313] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:43:11,212 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:43:11,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2024-10-14 17:43:11,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355372426] [2024-10-14 17:43:11,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:43:11,212 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-10-14 17:43:11,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:43:11,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-10-14 17:43:11,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2024-10-14 17:43:11,213 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) [2024-10-14 17:43:11,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:43:11,935 INFO L93 Difference]: Finished difference Result 97 states and 111 transitions. [2024-10-14 17:43:11,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-10-14 17:43:11,935 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 [2024-10-14 17:43:11,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:43:11,935 INFO L225 Difference]: With dead ends: 97 [2024-10-14 17:43:11,935 INFO L226 Difference]: Without dead ends: 97 [2024-10-14 17:43:11,936 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=382, Invalid=1780, Unknown=0, NotChecked=0, Total=2162 [2024-10-14 17:43:11,936 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 82 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-14 17:43:11,936 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 132 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 463 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-14 17:43:11,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2024-10-14 17:43:11,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 80. [2024-10-14 17:43:11,938 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) [2024-10-14 17:43:11,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 93 transitions. [2024-10-14 17:43:11,938 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 93 transitions. Word has length 28 [2024-10-14 17:43:11,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:43:11,938 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 93 transitions. [2024-10-14 17:43:11,938 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) [2024-10-14 17:43:11,938 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 93 transitions. [2024-10-14 17:43:11,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-10-14 17:43:11,939 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:43:11,939 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] [2024-10-14 17:43:11,952 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-10-14 17:43:12,142 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 [2024-10-14 17:43:12,143 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)] === [2024-10-14 17:43:12,143 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:43:12,143 INFO L85 PathProgramCache]: Analyzing trace with hash 934828339, now seen corresponding path program 3 times [2024-10-14 17:43:12,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:43:12,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582796054] [2024-10-14 17:43:12,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:43:12,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:43:12,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:43:12,370 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-14 17:43:12,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:43:12,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582796054] [2024-10-14 17:43:12,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582796054] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:43:12,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137303899] [2024-10-14 17:43:12,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-14 17:43:12,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:43:12,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:43:12,373 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) [2024-10-14 17:43:12,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-10-14 17:43:12,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-14 17:43:12,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 17:43:12,460 INFO L255 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-10-14 17:43:12,461 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:43:12,515 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 [2024-10-14 17:43:12,571 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-14 17:43:12,572 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:43:12,587 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 15 treesize of output 13 [2024-10-14 17:43:12,589 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 [2024-10-14 17:43:12,632 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-14 17:43:12,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137303899] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:43:12,633 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:43:12,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 22 [2024-10-14 17:43:12,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008865173] [2024-10-14 17:43:12,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:43:12,633 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-14 17:43:12,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:43:12,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-14 17:43:12,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2024-10-14 17:43:12,634 INFO L87 Difference]: Start difference. First operand 80 states and 93 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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) [2024-10-14 17:43:12,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:43:12,736 INFO L93 Difference]: Finished difference Result 149 states and 171 transitions. [2024-10-14 17:43:12,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-14 17:43:12,736 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2024-10-14 17:43:12,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:43:12,737 INFO L225 Difference]: With dead ends: 149 [2024-10-14 17:43:12,737 INFO L226 Difference]: Without dead ends: 122 [2024-10-14 17:43:12,737 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2024-10-14 17:43:12,737 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 5 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 17:43:12,738 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 158 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 17:43:12,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2024-10-14 17:43:12,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 119. [2024-10-14 17:43:12,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 117 states have (on average 1.1623931623931625) internal successors, (136), 118 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:43:12,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 136 transitions. [2024-10-14 17:43:12,739 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 136 transitions. Word has length 29 [2024-10-14 17:43:12,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:43:12,740 INFO L471 AbstractCegarLoop]: Abstraction has 119 states and 136 transitions. [2024-10-14 17:43:12,740 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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) [2024-10-14 17:43:12,740 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 136 transitions. [2024-10-14 17:43:12,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-10-14 17:43:12,740 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:43:12,740 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:43:12,753 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-10-14 17:43:12,944 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 [2024-10-14 17:43:12,944 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-10-14 17:43:12,945 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:43:12,945 INFO L85 PathProgramCache]: Analyzing trace with hash -384887582, now seen corresponding path program 4 times [2024-10-14 17:43:12,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:43:12,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211206388] [2024-10-14 17:43:12,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:43:12,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:43:12,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:43:13,019 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-14 17:43:13,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:43:13,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211206388] [2024-10-14 17:43:13,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211206388] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:43:13,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808465283] [2024-10-14 17:43:13,020 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-14 17:43:13,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:43:13,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:43:13,021 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) [2024-10-14 17:43:13,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-10-14 17:43:13,103 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-14 17:43:13,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 17:43:13,109 INFO L255 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-10-14 17:43:13,110 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:43:13,131 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 [2024-10-14 17:43:13,374 INFO L349 Elim1Store]: treesize reduction 4, result has 81.8 percent of original size [2024-10-14 17:43:13,377 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 [2024-10-14 17:43:13,501 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-14 17:43:13,503 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:43:13,958 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 [2024-10-14 17:43:13,967 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 45 treesize of output 39 [2024-10-14 17:43:13,976 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 [2024-10-14 17:43:13,994 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-14 17:43:13,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808465283] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:43:13,994 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:43:13,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 28 [2024-10-14 17:43:13,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24253163] [2024-10-14 17:43:13,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:43:13,995 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-10-14 17:43:13,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:43:13,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-10-14 17:43:13,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2024-10-14 17:43:13,996 INFO L87 Difference]: Start difference. First operand 119 states and 136 transitions. Second operand has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 28 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) [2024-10-14 17:43:14,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:43:14,442 INFO L93 Difference]: Finished difference Result 120 states and 135 transitions. [2024-10-14 17:43:14,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-14 17:43:14,443 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 28 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) Word has length 31 [2024-10-14 17:43:14,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:43:14,444 INFO L225 Difference]: With dead ends: 120 [2024-10-14 17:43:14,444 INFO L226 Difference]: Without dead ends: 120 [2024-10-14 17:43:14,444 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=186, Invalid=1454, Unknown=0, NotChecked=0, Total=1640 [2024-10-14 17:43:14,445 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 25 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-14 17:43:14,445 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 163 Invalid, 471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 468 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-14 17:43:14,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2024-10-14 17:43:14,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 108. [2024-10-14 17:43:14,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.1495327102803738) internal successors, (123), 107 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:43:14,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 123 transitions. [2024-10-14 17:43:14,447 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 123 transitions. Word has length 31 [2024-10-14 17:43:14,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:43:14,447 INFO L471 AbstractCegarLoop]: Abstraction has 108 states and 123 transitions. [2024-10-14 17:43:14,447 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 28 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) [2024-10-14 17:43:14,447 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 123 transitions. [2024-10-14 17:43:14,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-10-14 17:43:14,447 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:43:14,447 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] [2024-10-14 17:43:14,460 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-10-14 17:43:14,651 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 [2024-10-14 17:43:14,652 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-10-14 17:43:14,652 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:43:14,652 INFO L85 PathProgramCache]: Analyzing trace with hash 2094534791, now seen corresponding path program 2 times [2024-10-14 17:43:14,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:43:14,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455898252] [2024-10-14 17:43:14,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:43:14,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:43:14,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:43:15,009 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 17:43:15,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:43:15,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455898252] [2024-10-14 17:43:15,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455898252] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:43:15,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355444103] [2024-10-14 17:43:15,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 17:43:15,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:43:15,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:43:15,014 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) [2024-10-14 17:43:15,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-10-14 17:43:15,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 17:43:15,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 17:43:15,104 INFO L255 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-10-14 17:43:15,106 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:43:15,297 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 [2024-10-14 17:43:15,411 INFO L349 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2024-10-14 17:43:15,411 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 [2024-10-14 17:43:15,428 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-14 17:43:15,429 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:43:15,499 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 [2024-10-14 17:43:15,503 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 17:43:15,503 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 [2024-10-14 17:43:15,730 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-14 17:43:15,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355444103] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:43:15,731 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:43:15,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 35 [2024-10-14 17:43:15,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326601509] [2024-10-14 17:43:15,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:43:15,731 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-10-14 17:43:15,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:43:15,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-10-14 17:43:15,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1059, Unknown=0, NotChecked=0, Total=1190 [2024-10-14 17:43:15,732 INFO L87 Difference]: Start difference. First operand 108 states and 123 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) [2024-10-14 17:43:16,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:43:16,902 INFO L93 Difference]: Finished difference Result 139 states and 156 transitions. [2024-10-14 17:43:16,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-10-14 17:43:16,903 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 [2024-10-14 17:43:16,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:43:16,903 INFO L225 Difference]: With dead ends: 139 [2024-10-14 17:43:16,903 INFO L226 Difference]: Without dead ends: 125 [2024-10-14 17:43:16,904 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 756 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=479, Invalid=3181, Unknown=0, NotChecked=0, Total=3660 [2024-10-14 17:43:16,904 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 66 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 863 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 863 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-14 17:43:16,905 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 184 Invalid, 880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 863 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-14 17:43:16,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2024-10-14 17:43:16,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 105. [2024-10-14 17:43:16,906 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) [2024-10-14 17:43:16,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 119 transitions. [2024-10-14 17:43:16,906 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 119 transitions. Word has length 32 [2024-10-14 17:43:16,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:43:16,906 INFO L471 AbstractCegarLoop]: Abstraction has 105 states and 119 transitions. [2024-10-14 17:43:16,906 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) [2024-10-14 17:43:16,907 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 119 transitions. [2024-10-14 17:43:16,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-10-14 17:43:16,907 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:43:16,907 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] [2024-10-14 17:43:16,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-10-14 17:43:17,107 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 [2024-10-14 17:43:17,108 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)] === [2024-10-14 17:43:17,108 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:43:17,108 INFO L85 PathProgramCache]: Analyzing trace with hash 305001407, now seen corresponding path program 3 times [2024-10-14 17:43:17,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:43:17,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170238833] [2024-10-14 17:43:17,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:43:17,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:43:17,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:43:17,554 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 17:43:17,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:43:17,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170238833] [2024-10-14 17:43:17,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170238833] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:43:17,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656174415] [2024-10-14 17:43:17,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-14 17:43:17,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:43:17,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:43:17,556 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) [2024-10-14 17:43:17,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-10-14 17:43:17,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-10-14 17:43:17,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 17:43:17,658 INFO L255 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 67 conjuncts are in the unsatisfiable core [2024-10-14 17:43:17,663 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:43:17,853 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 [2024-10-14 17:43:18,606 INFO L349 Elim1Store]: treesize reduction 4, result has 87.9 percent of original size [2024-10-14 17:43:18,606 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 [2024-10-14 17:43:18,822 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 5 proven. 12 refuted. 2 times theorem prover too weak. 13 trivial. 0 not checked. [2024-10-14 17:43:18,823 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:43:19,370 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 [2024-10-14 17:43:19,417 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 17:43:19,418 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 [2024-10-14 17:43:19,643 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 [2024-10-14 17:43:19,776 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-14 17:43:19,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656174415] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:43:19,777 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:43:19,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 16] total 43 [2024-10-14 17:43:19,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338936931] [2024-10-14 17:43:19,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:43:19,777 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-10-14 17:43:19,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:43:19,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-10-14 17:43:19,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1700, Unknown=1, NotChecked=0, Total=1892 [2024-10-14 17:43:19,778 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) [2024-10-14 17:43:21,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:43:21,417 INFO L93 Difference]: Finished difference Result 151 states and 167 transitions. [2024-10-14 17:43:21,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-10-14 17:43:21,417 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 [2024-10-14 17:43:21,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:43:21,418 INFO L225 Difference]: With dead ends: 151 [2024-10-14 17:43:21,418 INFO L226 Difference]: Without dead ends: 118 [2024-10-14 17:43:21,419 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=634, Invalid=4767, Unknown=1, NotChecked=0, Total=5402 [2024-10-14 17:43:21,419 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 54 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 1168 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 1207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-14 17:43:21,419 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 192 Invalid, 1207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1168 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-14 17:43:21,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2024-10-14 17:43:21,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 88. [2024-10-14 17:43:21,424 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) [2024-10-14 17:43:21,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 100 transitions. [2024-10-14 17:43:21,424 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 100 transitions. Word has length 36 [2024-10-14 17:43:21,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:43:21,424 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 100 transitions. [2024-10-14 17:43:21,424 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) [2024-10-14 17:43:21,424 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 100 transitions. [2024-10-14 17:43:21,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-10-14 17:43:21,425 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:43:21,425 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] [2024-10-14 17:43:21,439 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-10-14 17:43:21,625 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 [2024-10-14 17:43:21,625 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)] === [2024-10-14 17:43:21,626 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:43:21,626 INFO L85 PathProgramCache]: Analyzing trace with hash 280462895, now seen corresponding path program 4 times [2024-10-14 17:43:21,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:43:21,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029995333] [2024-10-14 17:43:21,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:43:21,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:43:21,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:43:22,119 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 17:43:22,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:43:22,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029995333] [2024-10-14 17:43:22,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029995333] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:43:22,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60848961] [2024-10-14 17:43:22,120 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-14 17:43:22,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:43:22,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:43:22,122 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) [2024-10-14 17:43:22,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-10-14 17:43:22,253 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-14 17:43:22,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 17:43:22,255 INFO L255 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-10-14 17:43:22,256 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:43:22,460 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 [2024-10-14 17:43:22,492 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-10-14 17:43:22,492 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:43:22,498 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 [2024-10-14 17:43:22,499 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 [2024-10-14 17:43:22,686 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-10-14 17:43:22,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60848961] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:43:22,687 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:43:22,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 13, 13] total 36 [2024-10-14 17:43:22,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8346752] [2024-10-14 17:43:22,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:43:22,687 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-10-14 17:43:22,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:43:22,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-10-14 17:43:22,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1103, Unknown=0, NotChecked=0, Total=1260 [2024-10-14 17:43:22,688 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) [2024-10-14 17:43:23,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:43:23,298 INFO L93 Difference]: Finished difference Result 103 states and 113 transitions. [2024-10-14 17:43:23,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-10-14 17:43:23,299 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 [2024-10-14 17:43:23,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:43:23,299 INFO L225 Difference]: With dead ends: 103 [2024-10-14 17:43:23,299 INFO L226 Difference]: Without dead ends: 79 [2024-10-14 17:43:23,300 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=579, Invalid=3081, Unknown=0, NotChecked=0, Total=3660 [2024-10-14 17:43:23,300 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 109 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 542 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-14 17:43:23,301 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 151 Invalid, 554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 542 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-14 17:43:23,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2024-10-14 17:43:23,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 76. [2024-10-14 17:43:23,302 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) [2024-10-14 17:43:23,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 85 transitions. [2024-10-14 17:43:23,302 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 85 transitions. Word has length 40 [2024-10-14 17:43:23,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:43:23,302 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 85 transitions. [2024-10-14 17:43:23,302 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) [2024-10-14 17:43:23,302 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 85 transitions. [2024-10-14 17:43:23,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-10-14 17:43:23,303 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:43:23,303 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] [2024-10-14 17:43:23,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-10-14 17:43:23,503 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 [2024-10-14 17:43:23,503 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)] === [2024-10-14 17:43:23,504 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:43:23,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1282040744, now seen corresponding path program 5 times [2024-10-14 17:43:23,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:43:23,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597057352] [2024-10-14 17:43:23,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:43:23,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:43:23,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:43:23,933 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-14 17:43:23,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:43:23,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597057352] [2024-10-14 17:43:23,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597057352] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:43:23,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476143249] [2024-10-14 17:43:23,933 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-14 17:43:23,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:43:23,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:43:23,935 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) [2024-10-14 17:43:23,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-10-14 17:43:24,051 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-10-14 17:43:24,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 17:43:24,057 INFO L255 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-10-14 17:43:24,059 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:43:24,256 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 [2024-10-14 17:43:24,337 INFO L349 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2024-10-14 17:43:24,338 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 [2024-10-14 17:43:24,339 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-14 17:43:24,340 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:43:24,377 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 [2024-10-14 17:43:24,380 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 17:43:24,380 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 [2024-10-14 17:43:24,618 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-14 17:43:24,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476143249] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:43:24,619 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:43:24,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 38 [2024-10-14 17:43:24,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193727751] [2024-10-14 17:43:24,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:43:24,619 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-10-14 17:43:24,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:43:24,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-10-14 17:43:24,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=1177, Unknown=0, NotChecked=0, Total=1406 [2024-10-14 17:43:24,620 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) [2024-10-14 17:43:25,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:43:25,163 INFO L93 Difference]: Finished difference Result 91 states and 103 transitions. [2024-10-14 17:43:25,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-10-14 17:43:25,164 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 [2024-10-14 17:43:25,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:43:25,164 INFO L225 Difference]: With dead ends: 91 [2024-10-14 17:43:25,164 INFO L226 Difference]: Without dead ends: 91 [2024-10-14 17:43:25,165 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1004 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=665, Invalid=2875, Unknown=0, NotChecked=0, Total=3540 [2024-10-14 17:43:25,166 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 107 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-14 17:43:25,166 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 122 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 363 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-14 17:43:25,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2024-10-14 17:43:25,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 85. [2024-10-14 17:43:25,167 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) [2024-10-14 17:43:25,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 96 transitions. [2024-10-14 17:43:25,171 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 96 transitions. Word has length 42 [2024-10-14 17:43:25,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:43:25,171 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 96 transitions. [2024-10-14 17:43:25,171 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) [2024-10-14 17:43:25,171 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 96 transitions. [2024-10-14 17:43:25,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-10-14 17:43:25,172 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:43:25,174 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] [2024-10-14 17:43:25,187 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-10-14 17:43:25,377 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 [2024-10-14 17:43:25,378 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)] === [2024-10-14 17:43:25,378 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:43:25,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1246908071, now seen corresponding path program 6 times [2024-10-14 17:43:25,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:43:25,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138954553] [2024-10-14 17:43:25,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:43:25,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:43:25,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:43:25,809 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 9 proven. 38 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-14 17:43:25,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:43:25,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138954553] [2024-10-14 17:43:25,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138954553] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:43:25,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207214106] [2024-10-14 17:43:25,809 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-14 17:43:25,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:43:25,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:43:25,811 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) [2024-10-14 17:43:25,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-10-14 17:43:25,962 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-10-14 17:43:25,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 17:43:25,964 INFO L255 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 66 conjuncts are in the unsatisfiable core [2024-10-14 17:43:25,967 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:43:26,342 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 [2024-10-14 17:43:26,550 INFO L349 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2024-10-14 17:43:26,550 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 [2024-10-14 17:43:26,573 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 35 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-14 17:43:26,573 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:43:26,692 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 [2024-10-14 17:43:26,695 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 17:43:26,695 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 [2024-10-14 17:43:27,151 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-14 17:43:27,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207214106] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:43:27,151 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:43:27,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 21, 21] total 54 [2024-10-14 17:43:27,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370638468] [2024-10-14 17:43:27,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:43:27,152 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2024-10-14 17:43:27,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:43:27,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2024-10-14 17:43:27,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=2575, Unknown=0, NotChecked=0, Total=2862 [2024-10-14 17:43:27,153 INFO L87 Difference]: Start difference. First operand 85 states and 96 transitions. Second operand has 54 states, 54 states have (on average 1.9074074074074074) internal successors, (103), 54 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) [2024-10-14 17:43:29,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:43:29,000 INFO L93 Difference]: Finished difference Result 156 states and 177 transitions. [2024-10-14 17:43:29,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2024-10-14 17:43:29,001 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.9074074074074074) internal successors, (103), 54 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 [2024-10-14 17:43:29,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:43:29,002 INFO L225 Difference]: With dead ends: 156 [2024-10-14 17:43:29,002 INFO L226 Difference]: Without dead ends: 156 [2024-10-14 17:43:29,004 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2203 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=956, Invalid=7786, Unknown=0, NotChecked=0, Total=8742 [2024-10-14 17:43:29,004 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 167 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 1849 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 1878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1849 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-10-14 17:43:29,005 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 411 Invalid, 1878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1849 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-10-14 17:43:29,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2024-10-14 17:43:29,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 105. [2024-10-14 17:43:29,006 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) [2024-10-14 17:43:29,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 120 transitions. [2024-10-14 17:43:29,007 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 120 transitions. Word has length 44 [2024-10-14 17:43:29,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:43:29,007 INFO L471 AbstractCegarLoop]: Abstraction has 105 states and 120 transitions. [2024-10-14 17:43:29,007 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.9074074074074074) internal successors, (103), 54 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) [2024-10-14 17:43:29,007 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 120 transitions. [2024-10-14 17:43:29,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-10-14 17:43:29,007 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:43:29,007 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] [2024-10-14 17:43:29,020 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-10-14 17:43:29,208 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 [2024-10-14 17:43:29,208 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)] === [2024-10-14 17:43:29,208 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:43:29,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1673899238, now seen corresponding path program 7 times [2024-10-14 17:43:29,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:43:29,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953066638] [2024-10-14 17:43:29,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:43:29,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:43:29,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:43:29,562 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-14 17:43:29,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:43:29,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953066638] [2024-10-14 17:43:29,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953066638] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:43:29,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73955807] [2024-10-14 17:43:29,563 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-14 17:43:29,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:43:29,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:43:29,566 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) [2024-10-14 17:43:29,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-10-14 17:43:29,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:43:29,684 INFO L255 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-10-14 17:43:29,685 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:43:29,757 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 [2024-10-14 17:43:29,862 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-10-14 17:43:29,862 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:43:29,882 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 [2024-10-14 17:43:29,883 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 [2024-10-14 17:43:29,940 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-10-14 17:43:29,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73955807] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:43:29,940 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:43:29,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 28 [2024-10-14 17:43:29,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463925726] [2024-10-14 17:43:29,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:43:29,941 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-10-14 17:43:29,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:43:29,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-10-14 17:43:29,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=684, Unknown=0, NotChecked=0, Total=756 [2024-10-14 17:43:29,941 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) [2024-10-14 17:43:30,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:43:30,322 INFO L93 Difference]: Finished difference Result 232 states and 257 transitions. [2024-10-14 17:43:30,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-14 17:43:30,322 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 [2024-10-14 17:43:30,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:43:30,323 INFO L225 Difference]: With dead ends: 232 [2024-10-14 17:43:30,323 INFO L226 Difference]: Without dead ends: 150 [2024-10-14 17:43:30,323 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 [2024-10-14 17:43:30,323 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 6 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-14 17:43:30,323 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 274 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 503 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-14 17:43:30,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2024-10-14 17:43:30,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 147. [2024-10-14 17:43:30,325 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) [2024-10-14 17:43:30,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 165 transitions. [2024-10-14 17:43:30,325 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 165 transitions. Word has length 46 [2024-10-14 17:43:30,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:43:30,326 INFO L471 AbstractCegarLoop]: Abstraction has 147 states and 165 transitions. [2024-10-14 17:43:30,326 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) [2024-10-14 17:43:30,326 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 165 transitions. [2024-10-14 17:43:30,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-10-14 17:43:30,326 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:43:30,326 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] [2024-10-14 17:43:30,338 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-10-14 17:43:30,526 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 [2024-10-14 17:43:30,527 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)] === [2024-10-14 17:43:30,527 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:43:30,527 INFO L85 PathProgramCache]: Analyzing trace with hash 601132183, now seen corresponding path program 8 times [2024-10-14 17:43:30,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:43:30,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319109775] [2024-10-14 17:43:30,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:43:30,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:43:30,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:43:31,183 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 31 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 17:43:31,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:43:31,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319109775] [2024-10-14 17:43:31,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319109775] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:43:31,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252526400] [2024-10-14 17:43:31,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 17:43:31,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:43:31,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:43:31,186 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) [2024-10-14 17:43:31,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-10-14 17:43:31,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 17:43:31,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 17:43:31,317 INFO L255 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-10-14 17:43:31,318 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:43:31,636 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 [2024-10-14 17:43:31,676 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-10-14 17:43:31,676 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:43:31,700 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 [2024-10-14 17:43:31,702 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 [2024-10-14 17:43:31,990 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 11 proven. 16 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-10-14 17:43:31,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252526400] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:43:31,990 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:43:31,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 15, 15] total 45 [2024-10-14 17:43:31,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077910937] [2024-10-14 17:43:31,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:43:31,991 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-10-14 17:43:31,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:43:31,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-10-14 17:43:31,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=1745, Unknown=0, NotChecked=0, Total=1980 [2024-10-14 17:43:31,991 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) [2024-10-14 17:43:33,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:43:33,375 INFO L93 Difference]: Finished difference Result 169 states and 186 transitions. [2024-10-14 17:43:33,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2024-10-14 17:43:33,376 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 [2024-10-14 17:43:33,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:43:33,376 INFO L225 Difference]: With dead ends: 169 [2024-10-14 17:43:33,376 INFO L226 Difference]: Without dead ends: 141 [2024-10-14 17:43:33,377 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1915 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1125, Invalid=6185, Unknown=0, NotChecked=0, Total=7310 [2024-10-14 17:43:33,377 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 115 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 663 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-14 17:43:33,377 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 177 Invalid, 679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 663 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-14 17:43:33,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2024-10-14 17:43:33,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 139. [2024-10-14 17:43:33,379 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) [2024-10-14 17:43:33,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 155 transitions. [2024-10-14 17:43:33,379 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 155 transitions. Word has length 48 [2024-10-14 17:43:33,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:43:33,379 INFO L471 AbstractCegarLoop]: Abstraction has 139 states and 155 transitions. [2024-10-14 17:43:33,379 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) [2024-10-14 17:43:33,379 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 155 transitions. [2024-10-14 17:43:33,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-10-14 17:43:33,380 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:43:33,380 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] [2024-10-14 17:43:33,392 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-10-14 17:43:33,580 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 [2024-10-14 17:43:33,581 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)] === [2024-10-14 17:43:33,581 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:43:33,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1450829729, now seen corresponding path program 9 times [2024-10-14 17:43:33,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:43:33,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740281462] [2024-10-14 17:43:33,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:43:33,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:43:33,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:43:34,224 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 16 proven. 50 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-14 17:43:34,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:43:34,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740281462] [2024-10-14 17:43:34,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740281462] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:43:34,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484538256] [2024-10-14 17:43:34,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-14 17:43:34,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:43:34,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:43:34,226 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) [2024-10-14 17:43:34,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-10-14 17:43:34,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-10-14 17:43:34,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 17:43:34,387 INFO L255 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 109 conjuncts are in the unsatisfiable core [2024-10-14 17:43:34,390 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:43:34,662 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 [2024-10-14 17:43:35,044 INFO L349 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2024-10-14 17:43:35,045 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 [2024-10-14 17:43:35,251 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 6 proven. 34 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-14 17:43:35,251 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:43:35,821 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 [2024-10-14 17:43:35,824 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 [2024-10-14 17:43:35,956 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 23 treesize of output 19 [2024-10-14 17:43:36,273 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-14 17:43:36,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484538256] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:43:36,273 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:43:36,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 54 [2024-10-14 17:43:36,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670134485] [2024-10-14 17:43:36,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:43:36,273 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2024-10-14 17:43:36,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:43:36,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2024-10-14 17:43:36,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=2709, Unknown=0, NotChecked=0, Total=2970 [2024-10-14 17:43:36,274 INFO L87 Difference]: Start difference. First operand 139 states and 155 transitions. Second operand has 55 states, 54 states have (on average 2.1666666666666665) internal successors, (117), 55 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:43:39,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:43:39,004 INFO L93 Difference]: Finished difference Result 290 states and 317 transitions. [2024-10-14 17:43:39,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2024-10-14 17:43:39,004 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 54 states have (on average 2.1666666666666665) internal successors, (117), 55 states have internal predecessors, (117), 0 states have call successors, (0), 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 [2024-10-14 17:43:39,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:43:39,005 INFO L225 Difference]: With dead ends: 290 [2024-10-14 17:43:39,005 INFO L226 Difference]: Without dead ends: 264 [2024-10-14 17:43:39,006 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2292 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=818, Invalid=9082, Unknown=0, NotChecked=0, Total=9900 [2024-10-14 17:43:39,006 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 86 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 2405 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 2458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 2405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-10-14 17:43:39,007 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 448 Invalid, 2458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 2405 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-10-14 17:43:39,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2024-10-14 17:43:39,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 166. [2024-10-14 17:43:39,009 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) [2024-10-14 17:43:39,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 187 transitions. [2024-10-14 17:43:39,009 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 187 transitions. Word has length 48 [2024-10-14 17:43:39,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:43:39,009 INFO L471 AbstractCegarLoop]: Abstraction has 166 states and 187 transitions. [2024-10-14 17:43:39,009 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 54 states have (on average 2.1666666666666665) internal successors, (117), 55 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:43:39,009 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 187 transitions. [2024-10-14 17:43:39,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-10-14 17:43:39,010 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:43:39,010 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] [2024-10-14 17:43:39,036 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-10-14 17:43:39,210 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 [2024-10-14 17:43:39,210 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)] === [2024-10-14 17:43:39,210 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:43:39,210 INFO L85 PathProgramCache]: Analyzing trace with hash -1565044401, now seen corresponding path program 10 times [2024-10-14 17:43:39,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:43:39,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117802797] [2024-10-14 17:43:39,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:43:39,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:43:39,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:43:39,597 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 25 proven. 20 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-10-14 17:43:39,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:43:39,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117802797] [2024-10-14 17:43:39,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117802797] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:43:39,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365566931] [2024-10-14 17:43:39,598 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-14 17:43:39,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:43:39,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:43:39,600 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) [2024-10-14 17:43:39,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-10-14 17:43:39,776 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-14 17:43:39,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 17:43:39,778 INFO L255 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-10-14 17:43:39,780 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:43:39,876 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 [2024-10-14 17:43:40,018 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 12 proven. 33 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-10-14 17:43:40,018 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:43:40,044 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 [2024-10-14 17:43:40,045 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 [2024-10-14 17:43:40,111 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 12 proven. 33 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-10-14 17:43:40,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365566931] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:43:40,111 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:43:40,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 31 [2024-10-14 17:43:40,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725697271] [2024-10-14 17:43:40,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:43:40,112 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-10-14 17:43:40,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:43:40,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-10-14 17:43:40,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=852, Unknown=0, NotChecked=0, Total=930 [2024-10-14 17:43:40,113 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) [2024-10-14 17:43:40,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:43:40,642 INFO L93 Difference]: Finished difference Result 333 states and 366 transitions. [2024-10-14 17:43:40,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-10-14 17:43:40,643 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 [2024-10-14 17:43:40,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:43:40,644 INFO L225 Difference]: With dead ends: 333 [2024-10-14 17:43:40,644 INFO L226 Difference]: Without dead ends: 236 [2024-10-14 17:43:40,644 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=176, Invalid=1894, Unknown=0, NotChecked=0, Total=2070 [2024-10-14 17:43:40,644 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 10 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 704 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-14 17:43:40,645 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 339 Invalid, 711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 704 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-14 17:43:40,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2024-10-14 17:43:40,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 220. [2024-10-14 17:43:40,647 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) [2024-10-14 17:43:40,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 249 transitions. [2024-10-14 17:43:40,647 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 249 transitions. Word has length 52 [2024-10-14 17:43:40,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:43:40,647 INFO L471 AbstractCegarLoop]: Abstraction has 220 states and 249 transitions. [2024-10-14 17:43:40,648 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) [2024-10-14 17:43:40,648 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 249 transitions. [2024-10-14 17:43:40,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-10-14 17:43:40,648 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:43:40,648 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] [2024-10-14 17:43:40,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2024-10-14 17:43:40,852 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 [2024-10-14 17:43:40,853 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)] === [2024-10-14 17:43:40,853 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:43:40,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1055791040, now seen corresponding path program 11 times [2024-10-14 17:43:40,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:43:40,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169638237] [2024-10-14 17:43:40,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:43:40,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:43:40,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:43:41,216 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 8 proven. 37 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-10-14 17:43:41,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:43:41,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169638237] [2024-10-14 17:43:41,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169638237] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:43:41,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418536811] [2024-10-14 17:43:41,217 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-14 17:43:41,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:43:41,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:43:41,218 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) [2024-10-14 17:43:41,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-10-14 17:43:41,525 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-10-14 17:43:41,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 17:43:41,527 INFO L255 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-10-14 17:43:41,529 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:43:41,791 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 [2024-10-14 17:43:41,796 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 [2024-10-14 17:43:41,796 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-10-14 17:43:41,796 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:43:41,802 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 [2024-10-14 17:43:41,803 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 [2024-10-14 17:43:42,018 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 20 proven. 25 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-10-14 17:43:42,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418536811] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:43:42,018 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:43:42,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 40 [2024-10-14 17:43:42,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191737109] [2024-10-14 17:43:42,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:43:42,019 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-10-14 17:43:42,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:43:42,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-10-14 17:43:42,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=1247, Unknown=0, NotChecked=0, Total=1560 [2024-10-14 17:43:42,020 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) [2024-10-14 17:43:42,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:43:42,581 INFO L93 Difference]: Finished difference Result 220 states and 247 transitions. [2024-10-14 17:43:42,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-10-14 17:43:42,581 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 [2024-10-14 17:43:42,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:43:42,582 INFO L225 Difference]: With dead ends: 220 [2024-10-14 17:43:42,582 INFO L226 Difference]: Without dead ends: 220 [2024-10-14 17:43:42,582 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 [2024-10-14 17:43:42,583 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 81 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-14 17:43:42,583 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 142 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-14 17:43:42,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2024-10-14 17:43:42,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 211. [2024-10-14 17:43:42,585 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) [2024-10-14 17:43:42,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 238 transitions. [2024-10-14 17:43:42,585 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 238 transitions. Word has length 54 [2024-10-14 17:43:42,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:43:42,585 INFO L471 AbstractCegarLoop]: Abstraction has 211 states and 238 transitions. [2024-10-14 17:43:42,585 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) [2024-10-14 17:43:42,585 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 238 transitions. [2024-10-14 17:43:42,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-10-14 17:43:42,586 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:43:42,589 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] [2024-10-14 17:43:42,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2024-10-14 17:43:42,789 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 [2024-10-14 17:43:42,789 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)] === [2024-10-14 17:43:42,790 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:43:42,790 INFO L85 PathProgramCache]: Analyzing trace with hash -329181496, now seen corresponding path program 12 times [2024-10-14 17:43:42,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:43:42,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404394031] [2024-10-14 17:43:42,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:43:42,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:43:42,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:43:43,619 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 12 proven. 51 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-10-14 17:43:43,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:43:43,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404394031] [2024-10-14 17:43:43,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404394031] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:43:43,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458296933] [2024-10-14 17:43:43,619 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-14 17:43:43,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:43:43,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:43:43,620 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) [2024-10-14 17:43:43,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-10-14 17:43:43,914 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-10-14 17:43:43,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 17:43:43,917 INFO L255 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 83 conjuncts are in the unsatisfiable core [2024-10-14 17:43:43,919 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:43:44,295 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 [2024-10-14 17:43:44,456 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 12 proven. 51 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-10-14 17:43:44,456 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:43:44,553 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 [2024-10-14 17:43:44,556 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 17:43:44,556 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 [2024-10-14 17:43:44,957 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 27 proven. 36 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-10-14 17:43:44,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458296933] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:43:44,957 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:43:44,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 53 [2024-10-14 17:43:44,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985634823] [2024-10-14 17:43:44,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:43:44,958 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2024-10-14 17:43:44,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:43:44,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2024-10-14 17:43:44,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=409, Invalid=2347, Unknown=0, NotChecked=0, Total=2756 [2024-10-14 17:43:44,959 INFO L87 Difference]: Start difference. First operand 211 states and 238 transitions. Second operand has 53 states, 53 states have (on average 1.830188679245283) internal successors, (97), 53 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:43:45,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:43:45,648 INFO L93 Difference]: Finished difference Result 242 states and 273 transitions. [2024-10-14 17:43:45,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-10-14 17:43:45,648 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.830188679245283) internal successors, (97), 53 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2024-10-14 17:43:45,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:43:45,649 INFO L225 Difference]: With dead ends: 242 [2024-10-14 17:43:45,649 INFO L226 Difference]: Without dead ends: 233 [2024-10-14 17:43:45,650 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 75 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1706 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=841, Invalid=4129, Unknown=0, NotChecked=0, Total=4970 [2024-10-14 17:43:45,650 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 125 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 700 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-14 17:43:45,650 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 195 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 700 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-14 17:43:45,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2024-10-14 17:43:45,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 224. [2024-10-14 17:43:45,655 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) [2024-10-14 17:43:45,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 254 transitions. [2024-10-14 17:43:45,655 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 254 transitions. Word has length 54 [2024-10-14 17:43:45,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:43:45,656 INFO L471 AbstractCegarLoop]: Abstraction has 224 states and 254 transitions. [2024-10-14 17:43:45,656 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.830188679245283) internal successors, (97), 53 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:43:45,656 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 254 transitions. [2024-10-14 17:43:45,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-10-14 17:43:45,659 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:43:45,660 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] [2024-10-14 17:43:45,674 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-10-14 17:43:45,860 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 [2024-10-14 17:43:45,861 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)] === [2024-10-14 17:43:45,861 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:43:45,861 INFO L85 PathProgramCache]: Analyzing trace with hash 611358407, now seen corresponding path program 13 times [2024-10-14 17:43:45,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:43:45,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205554839] [2024-10-14 17:43:45,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:43:45,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:43:45,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:43:46,466 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 25 proven. 65 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-14 17:43:46,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:43:46,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205554839] [2024-10-14 17:43:46,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205554839] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:43:46,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709815635] [2024-10-14 17:43:46,466 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-14 17:43:46,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:43:46,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:43:46,470 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) [2024-10-14 17:43:46,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-10-14 17:43:46,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:43:46,607 INFO L255 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 81 conjuncts are in the unsatisfiable core [2024-10-14 17:43:46,609 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:43:46,939 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 [2024-10-14 17:43:48,347 INFO L349 Elim1Store]: treesize reduction 17, result has 48.5 percent of original size [2024-10-14 17:43:48,348 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 [2024-10-14 17:43:48,371 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 18 proven. 57 refuted. 3 times theorem prover too weak. 21 trivial. 0 not checked. [2024-10-14 17:43:48,372 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:43:48,622 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 [2024-10-14 17:43:48,625 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 17:43:48,625 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 [2024-10-14 17:43:49,204 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 29 proven. 49 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-10-14 17:43:49,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709815635] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:43:49,204 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:43:49,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 24, 24] total 63 [2024-10-14 17:43:49,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169385432] [2024-10-14 17:43:49,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:43:49,205 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2024-10-14 17:43:49,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:43:49,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2024-10-14 17:43:49,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=373, Invalid=3529, Unknown=4, NotChecked=0, Total=3906 [2024-10-14 17:43:49,206 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) [2024-10-14 17:43:54,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:43:54,041 INFO L93 Difference]: Finished difference Result 376 states and 412 transitions. [2024-10-14 17:43:54,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2024-10-14 17:43:54,041 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 [2024-10-14 17:43:54,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:43:54,042 INFO L225 Difference]: With dead ends: 376 [2024-10-14 17:43:54,042 INFO L226 Difference]: Without dead ends: 350 [2024-10-14 17:43:54,045 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 [2024-10-14 17:43:54,045 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 88 mSDsluCounter, 576 mSDsCounter, 0 mSdLazyCounter, 3730 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 606 SdHoareTripleChecker+Invalid, 3759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 3730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-10-14 17:43:54,045 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 606 Invalid, 3759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 3730 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-10-14 17:43:54,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2024-10-14 17:43:54,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 244. [2024-10-14 17:43:54,048 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) [2024-10-14 17:43:54,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 276 transitions. [2024-10-14 17:43:54,049 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 276 transitions. Word has length 56 [2024-10-14 17:43:54,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:43:54,049 INFO L471 AbstractCegarLoop]: Abstraction has 244 states and 276 transitions. [2024-10-14 17:43:54,049 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) [2024-10-14 17:43:54,049 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 276 transitions. [2024-10-14 17:43:54,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-10-14 17:43:54,050 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:43:54,050 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] [2024-10-14 17:43:54,065 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-10-14 17:43:54,250 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 [2024-10-14 17:43:54,251 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)] === [2024-10-14 17:43:54,251 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:43:54,252 INFO L85 PathProgramCache]: Analyzing trace with hash -272565309, now seen corresponding path program 14 times [2024-10-14 17:43:54,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:43:54,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987000183] [2024-10-14 17:43:54,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:43:54,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:43:54,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:43:55,157 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 118 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-14 17:43:55,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:43:55,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987000183] [2024-10-14 17:43:55,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987000183] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:43:55,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136983619] [2024-10-14 17:43:55,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 17:43:55,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:43:55,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:43:55,159 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) [2024-10-14 17:43:55,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-10-14 17:43:55,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 17:43:55,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 17:43:55,312 INFO L255 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 63 conjuncts are in the unsatisfiable core [2024-10-14 17:43:55,313 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:43:55,648 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 [2024-10-14 17:43:57,081 INFO L349 Elim1Store]: treesize reduction 17, result has 48.5 percent of original size [2024-10-14 17:43:57,081 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 [2024-10-14 17:43:57,112 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 47 proven. 42 refuted. 3 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-14 17:43:57,112 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:43:57,408 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 [2024-10-14 17:43:57,411 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 17:43:57,411 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 [2024-10-14 17:43:57,925 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 56 proven. 36 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-14 17:43:57,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136983619] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:43:57,926 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:43:57,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22, 22] total 62 [2024-10-14 17:43:57,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588175969] [2024-10-14 17:43:57,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:43:57,926 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2024-10-14 17:43:57,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:43:57,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2024-10-14 17:43:57,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=3476, Unknown=4, NotChecked=0, Total=3782 [2024-10-14 17:43:57,927 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) [2024-10-14 17:44:00,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:44:00,324 INFO L93 Difference]: Finished difference Result 341 states and 376 transitions. [2024-10-14 17:44:00,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2024-10-14 17:44:00,325 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 [2024-10-14 17:44:00,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:44:00,325 INFO L225 Difference]: With dead ends: 341 [2024-10-14 17:44:00,326 INFO L226 Difference]: Without dead ends: 330 [2024-10-14 17:44:00,326 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 72 SyntacticMatches, 3 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2108 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=986, Invalid=8322, Unknown=4, NotChecked=0, Total=9312 [2024-10-14 17:44:00,326 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 106 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 2378 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 532 SdHoareTripleChecker+Invalid, 2414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 2378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-10-14 17:44:00,327 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 532 Invalid, 2414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 2378 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-10-14 17:44:00,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2024-10-14 17:44:00,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 318. [2024-10-14 17:44:00,329 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) [2024-10-14 17:44:00,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 356 transitions. [2024-10-14 17:44:00,330 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 356 transitions. Word has length 56 [2024-10-14 17:44:00,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:44:00,330 INFO L471 AbstractCegarLoop]: Abstraction has 318 states and 356 transitions. [2024-10-14 17:44:00,330 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) [2024-10-14 17:44:00,330 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 356 transitions. [2024-10-14 17:44:00,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-10-14 17:44:00,331 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:44:00,331 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] [2024-10-14 17:44:00,344 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2024-10-14 17:44:00,531 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 [2024-10-14 17:44:00,531 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)] === [2024-10-14 17:44:00,532 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:44:00,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1847012100, now seen corresponding path program 1 times [2024-10-14 17:44:00,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:44:00,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803073488] [2024-10-14 17:44:00,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:44:00,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:44:00,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:44:01,155 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 72 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:44:01,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:44:01,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803073488] [2024-10-14 17:44:01,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803073488] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:44:01,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168420711] [2024-10-14 17:44:01,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:44:01,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:44:01,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:44:01,158 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) [2024-10-14 17:44:01,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-10-14 17:44:01,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:44:01,297 INFO L255 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 56 conjuncts are in the unsatisfiable core [2024-10-14 17:44:01,298 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:44:01,420 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 [2024-10-14 17:44:01,597 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 35 proven. 56 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-10-14 17:44:01,597 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:44:01,626 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 [2024-10-14 17:44:01,627 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 [2024-10-14 17:44:01,707 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 35 proven. 56 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-10-14 17:44:01,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168420711] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:44:01,707 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:44:01,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 17, 17] total 42 [2024-10-14 17:44:01,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875458013] [2024-10-14 17:44:01,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:44:01,707 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-10-14 17:44:01,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:44:01,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-10-14 17:44:01,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1589, Unknown=0, NotChecked=0, Total=1722 [2024-10-14 17:44:01,708 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) [2024-10-14 17:44:03,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:44:03,054 INFO L93 Difference]: Finished difference Result 621 states and 672 transitions. [2024-10-14 17:44:03,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2024-10-14 17:44:03,055 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 [2024-10-14 17:44:03,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:44:03,056 INFO L225 Difference]: With dead ends: 621 [2024-10-14 17:44:03,056 INFO L226 Difference]: Without dead ends: 379 [2024-10-14 17:44:03,056 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1454 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=600, Invalid=5880, Unknown=0, NotChecked=0, Total=6480 [2024-10-14 17:44:03,057 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 81 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 1236 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 1246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-14 17:44:03,057 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 460 Invalid, 1246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1236 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-14 17:44:03,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2024-10-14 17:44:03,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 348. [2024-10-14 17:44:03,064 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) [2024-10-14 17:44:03,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 391 transitions. [2024-10-14 17:44:03,065 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 391 transitions. Word has length 58 [2024-10-14 17:44:03,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:44:03,065 INFO L471 AbstractCegarLoop]: Abstraction has 348 states and 391 transitions. [2024-10-14 17:44:03,065 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) [2024-10-14 17:44:03,065 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 391 transitions. [2024-10-14 17:44:03,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-10-14 17:44:03,066 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:44:03,066 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] [2024-10-14 17:44:03,079 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2024-10-14 17:44:03,266 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 [2024-10-14 17:44:03,267 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)] === [2024-10-14 17:44:03,267 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:44:03,267 INFO L85 PathProgramCache]: Analyzing trace with hash 504773762, now seen corresponding path program 15 times [2024-10-14 17:44:03,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:44:03,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725298624] [2024-10-14 17:44:03,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:44:03,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:44:03,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:44:04,077 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 131 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-14 17:44:04,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:44:04,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725298624] [2024-10-14 17:44:04,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725298624] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:44:04,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761472570] [2024-10-14 17:44:04,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-14 17:44:04,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:44:04,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:44:04,079 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) [2024-10-14 17:44:04,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-10-14 17:44:04,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2024-10-14 17:44:04,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 17:44:04,335 INFO L255 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 87 conjuncts are in the unsatisfiable core [2024-10-14 17:44:04,338 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:44:04,743 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 [2024-10-14 17:44:09,049 INFO L349 Elim1Store]: treesize reduction 21, result has 48.8 percent of original size [2024-10-14 17:44:09,050 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 [2024-10-14 17:44:09,080 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 48 proven. 56 refuted. 9 times theorem prover too weak. 22 trivial. 0 not checked. [2024-10-14 17:44:09,080 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:44:09,471 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 [2024-10-14 17:44:09,482 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 17:44:09,483 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 [2024-10-14 17:44:10,125 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-10-14 17:44:10,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761472570] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:44:10,126 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:44:10,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 69 [2024-10-14 17:44:10,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094748692] [2024-10-14 17:44:10,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:44:10,126 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2024-10-14 17:44:10,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:44:10,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2024-10-14 17:44:10,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=4302, Unknown=12, NotChecked=0, Total=4692 [2024-10-14 17:44:10,127 INFO L87 Difference]: Start difference. First operand 348 states and 391 transitions. Second operand has 69 states, 69 states have (on average 1.9130434782608696) internal successors, (132), 69 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:44:13,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:44:13,042 INFO L93 Difference]: Finished difference Result 430 states and 474 transitions. [2024-10-14 17:44:13,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2024-10-14 17:44:13,042 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.9130434782608696) internal successors, (132), 69 states have internal predecessors, (132), 0 states have call successors, (0), 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 [2024-10-14 17:44:13,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:44:13,043 INFO L225 Difference]: With dead ends: 430 [2024-10-14 17:44:13,043 INFO L226 Difference]: Without dead ends: 417 [2024-10-14 17:44:13,044 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 3362 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=1220, Invalid=10539, Unknown=13, NotChecked=0, Total=11772 [2024-10-14 17:44:13,044 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 92 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 2235 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 2273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 2235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-10-14 17:44:13,045 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 477 Invalid, 2273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 2235 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-10-14 17:44:13,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2024-10-14 17:44:13,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 388. [2024-10-14 17:44:13,048 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) [2024-10-14 17:44:13,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 432 transitions. [2024-10-14 17:44:13,049 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 432 transitions. Word has length 58 [2024-10-14 17:44:13,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:44:13,049 INFO L471 AbstractCegarLoop]: Abstraction has 388 states and 432 transitions. [2024-10-14 17:44:13,049 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.9130434782608696) internal successors, (132), 69 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:44:13,049 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 432 transitions. [2024-10-14 17:44:13,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-10-14 17:44:13,049 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:44:13,050 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] [2024-10-14 17:44:13,064 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2024-10-14 17:44:13,250 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 [2024-10-14 17:44:13,250 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)] === [2024-10-14 17:44:13,251 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:44:13,251 INFO L85 PathProgramCache]: Analyzing trace with hash 687023871, now seen corresponding path program 16 times [2024-10-14 17:44:13,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:44:13,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210531390] [2024-10-14 17:44:13,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:44:13,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:44:13,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:44:14,018 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 36 proven. 79 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-14 17:44:14,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:44:14,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210531390] [2024-10-14 17:44:14,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210531390] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:44:14,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487853734] [2024-10-14 17:44:14,019 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-14 17:44:14,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:44:14,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:44:14,020 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) [2024-10-14 17:44:14,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-10-14 17:44:14,331 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-14 17:44:14,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 17:44:14,336 INFO L255 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 75 conjuncts are in the unsatisfiable core [2024-10-14 17:44:14,339 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:44:14,857 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 [2024-10-14 17:44:19,324 INFO L349 Elim1Store]: treesize reduction 21, result has 48.8 percent of original size [2024-10-14 17:44:19,325 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 [2024-10-14 17:44:19,358 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 20 proven. 73 refuted. 10 times theorem prover too weak. 21 trivial. 0 not checked. [2024-10-14 17:44:19,358 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:44:19,773 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 [2024-10-14 17:44:19,779 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 17:44:19,779 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 [2024-10-14 17:44:20,484 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 39 proven. 64 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-10-14 17:44:20,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487853734] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:44:20,484 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:44:20,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 27, 27] total 71 [2024-10-14 17:44:20,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304776245] [2024-10-14 17:44:20,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:44:20,488 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2024-10-14 17:44:20,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:44:20,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2024-10-14 17:44:20,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=4515, Unknown=14, NotChecked=0, Total=4970 [2024-10-14 17:44:20,489 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)