./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/openbsd_cstrspn-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a046e57d Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/openbsd_cstrspn-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 e27d2e3e94b55a3b3138a7f2b03714931363cb725f69630c5958681cf34de99e --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-mul-div-a046e57-m [2024-10-13 10:31:49,957 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-13 10:31:50,006 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-13 10:31:50,010 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-13 10:31:50,011 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-13 10:31:50,036 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-13 10:31:50,038 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-13 10:31:50,038 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-13 10:31:50,039 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-13 10:31:50,040 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-13 10:31:50,040 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-13 10:31:50,041 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-13 10:31:50,041 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-13 10:31:50,042 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-13 10:31:50,042 INFO L153 SettingsManager]: * Use SBE=true [2024-10-13 10:31:50,043 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-13 10:31:50,043 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-13 10:31:50,044 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-13 10:31:50,045 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-13 10:31:50,045 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-13 10:31:50,045 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-13 10:31:50,045 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-13 10:31:50,046 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-13 10:31:50,046 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-13 10:31:50,046 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-13 10:31:50,047 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-13 10:31:50,047 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-13 10:31:50,047 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-13 10:31:50,047 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-13 10:31:50,048 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-13 10:31:50,048 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-13 10:31:50,048 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-13 10:31:50,049 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-13 10:31:50,049 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 10:31:50,049 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-13 10:31:50,049 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-13 10:31:50,050 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-13 10:31:50,050 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-13 10:31:50,050 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-13 10:31:50,061 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-13 10:31:50,062 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-13 10:31:50,062 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-13 10:31:50,063 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e27d2e3e94b55a3b3138a7f2b03714931363cb725f69630c5958681cf34de99e [2024-10-13 10:31:50,273 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-13 10:31:50,294 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-13 10:31:50,297 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-13 10:31:50,298 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-13 10:31:50,298 INFO L274 PluginConnector]: CDTParser initialized [2024-10-13 10:31:50,299 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/openbsd_cstrspn-alloca-2.i [2024-10-13 10:31:51,487 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-13 10:31:51,698 INFO L384 CDTParser]: Found 1 translation units. [2024-10-13 10:31:51,699 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/openbsd_cstrspn-alloca-2.i [2024-10-13 10:31:51,711 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/490b5b37f/3e31e38ac22c4a2b89948f7010d73542/FLAGd66d39e30 [2024-10-13 10:31:52,061 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/490b5b37f/3e31e38ac22c4a2b89948f7010d73542 [2024-10-13 10:31:52,063 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-13 10:31:52,064 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-13 10:31:52,065 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-13 10:31:52,066 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-13 10:31:52,069 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-13 10:31:52,070 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:31:52" (1/1) ... [2024-10-13 10:31:52,072 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5cee51d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:31:52, skipping insertion in model container [2024-10-13 10:31:52,072 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:31:52" (1/1) ... [2024-10-13 10:31:52,104 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-13 10:31:52,330 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 10:31:52,337 INFO L200 MainTranslator]: Completed pre-run [2024-10-13 10:31:52,370 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 10:31:52,389 INFO L204 MainTranslator]: Completed translation [2024-10-13 10:31:52,390 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:31:52 WrapperNode [2024-10-13 10:31:52,390 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-13 10:31:52,391 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-13 10:31:52,391 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-13 10:31:52,391 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-13 10:31:52,396 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:31:52" (1/1) ... [2024-10-13 10:31:52,406 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:31:52" (1/1) ... [2024-10-13 10:31:52,423 INFO L138 Inliner]: procedures = 117, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 89 [2024-10-13 10:31:52,423 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-13 10:31:52,424 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-13 10:31:52,424 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-13 10:31:52,424 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-13 10:31:52,435 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:31:52" (1/1) ... [2024-10-13 10:31:52,435 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:31:52" (1/1) ... [2024-10-13 10:31:52,439 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:31:52" (1/1) ... [2024-10-13 10:31:52,450 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [3, 3]. 50 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0, 0]. The 4 writes are split as follows [2, 2]. [2024-10-13 10:31:52,451 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:31:52" (1/1) ... [2024-10-13 10:31:52,451 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:31:52" (1/1) ... [2024-10-13 10:31:52,454 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:31:52" (1/1) ... [2024-10-13 10:31:52,456 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:31:52" (1/1) ... [2024-10-13 10:31:52,457 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:31:52" (1/1) ... [2024-10-13 10:31:52,458 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:31:52" (1/1) ... [2024-10-13 10:31:52,460 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-13 10:31:52,460 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-13 10:31:52,460 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-13 10:31:52,461 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-13 10:31:52,462 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:31:52" (1/1) ... [2024-10-13 10:31:52,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 10:31:52,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 10:31:52,494 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-13 10:31:52,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-13 10:31:52,534 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-13 10:31:52,535 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-13 10:31:52,535 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-13 10:31:52,535 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-13 10:31:52,535 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-13 10:31:52,535 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-13 10:31:52,535 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-13 10:31:52,536 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-13 10:31:52,638 INFO L238 CfgBuilder]: Building ICFG [2024-10-13 10:31:52,640 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-13 10:31:52,872 INFO L? ?]: Removed 56 outVars from TransFormulas that were not future-live. [2024-10-13 10:31:52,872 INFO L287 CfgBuilder]: Performing block encoding [2024-10-13 10:31:52,914 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-13 10:31:52,917 INFO L314 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-13 10:31:52,917 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:31:52 BoogieIcfgContainer [2024-10-13 10:31:52,917 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-13 10:31:52,920 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-13 10:31:52,920 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-13 10:31:52,923 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-13 10:31:52,923 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 10:31:52" (1/3) ... [2024-10-13 10:31:52,924 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7068053e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:31:52, skipping insertion in model container [2024-10-13 10:31:52,924 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:31:52" (2/3) ... [2024-10-13 10:31:52,925 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7068053e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:31:52, skipping insertion in model container [2024-10-13 10:31:52,925 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:31:52" (3/3) ... [2024-10-13 10:31:52,926 INFO L112 eAbstractionObserver]: Analyzing ICFG openbsd_cstrspn-alloca-2.i [2024-10-13 10:31:52,940 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-13 10:31:52,940 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations. [2024-10-13 10:31:52,971 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-13 10:31:52,976 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;@18c39142, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-13 10:31:52,976 INFO L334 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2024-10-13 10:31:52,979 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 20 states have (on average 2.1) internal successors, (42), 33 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:31:52,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-10-13 10:31:52,983 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:31:52,983 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-13 10:31:52,983 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-10-13 10:31:52,987 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:31:52,987 INFO L85 PathProgramCache]: Analyzing trace with hash -625475509, now seen corresponding path program 1 times [2024-10-13 10:31:52,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:31:52,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790932883] [2024-10-13 10:31:52,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:31:52,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:31:53,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:31:53,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:31:53,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:31:53,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790932883] [2024-10-13 10:31:53,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790932883] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 10:31:53,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 10:31:53,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-13 10:31:53,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455532950] [2024-10-13 10:31:53,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 10:31:53,202 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 10:31:53,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:31:53,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 10:31:53,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-13 10:31:53,227 INFO L87 Difference]: Start difference. First operand has 34 states, 20 states have (on average 2.1) internal successors, (42), 33 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) Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:31:53,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:31:53,295 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2024-10-13 10:31:53,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 10:31:53,297 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-10-13 10:31:53,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:31:53,303 INFO L225 Difference]: With dead ends: 45 [2024-10-13 10:31:53,303 INFO L226 Difference]: Without dead ends: 44 [2024-10-13 10:31:53,304 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-13 10:31:53,307 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 10 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 10:31:53,309 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 73 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 10:31:53,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-10-13 10:31:53,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 36. [2024-10-13 10:31:53,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 23 states have (on average 1.826086956521739) internal successors, (42), 35 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:31:53,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2024-10-13 10:31:53,335 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 6 [2024-10-13 10:31:53,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:31:53,335 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2024-10-13 10:31:53,335 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:31:53,335 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2024-10-13 10:31:53,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-10-13 10:31:53,336 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:31:53,336 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-13 10:31:53,336 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-13 10:31:53,336 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-10-13 10:31:53,337 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:31:53,337 INFO L85 PathProgramCache]: Analyzing trace with hash -623628467, now seen corresponding path program 1 times [2024-10-13 10:31:53,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:31:53,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051671031] [2024-10-13 10:31:53,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:31:53,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:31:53,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:31:53,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:31:53,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:31:53,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051671031] [2024-10-13 10:31:53,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051671031] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 10:31:53,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 10:31:53,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 10:31:53,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819946961] [2024-10-13 10:31:53,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 10:31:53,679 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 10:31:53,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:31:53,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 10:31:53,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-13 10:31:53,680 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:31:53,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:31:53,752 INFO L93 Difference]: Finished difference Result 50 states and 59 transitions. [2024-10-13 10:31:53,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-13 10:31:53,753 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-10-13 10:31:53,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:31:53,754 INFO L225 Difference]: With dead ends: 50 [2024-10-13 10:31:53,755 INFO L226 Difference]: Without dead ends: 50 [2024-10-13 10:31:53,755 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-13 10:31:53,756 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 39 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 10:31:53,757 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 50 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 10:31:53,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-10-13 10:31:53,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 34. [2024-10-13 10:31:53,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 33 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:31:53,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2024-10-13 10:31:53,763 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 6 [2024-10-13 10:31:53,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:31:53,764 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2024-10-13 10:31:53,764 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:31:53,764 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2024-10-13 10:31:53,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-10-13 10:31:53,764 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:31:53,765 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-13 10:31:53,765 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-13 10:31:53,765 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-10-13 10:31:53,765 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:31:53,766 INFO L85 PathProgramCache]: Analyzing trace with hash -623628466, now seen corresponding path program 1 times [2024-10-13 10:31:53,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:31:53,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168401988] [2024-10-13 10:31:53,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:31:53,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:31:53,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:31:53,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:31:53,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:31:53,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168401988] [2024-10-13 10:31:53,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168401988] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 10:31:53,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 10:31:53,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 10:31:53,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770537911] [2024-10-13 10:31:53,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 10:31:53,911 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-13 10:31:53,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:31:53,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-13 10:31:53,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-13 10:31:53,913 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:31:53,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:31:53,993 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2024-10-13 10:31:53,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-13 10:31:53,994 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-10-13 10:31:53,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:31:53,995 INFO L225 Difference]: With dead ends: 36 [2024-10-13 10:31:53,995 INFO L226 Difference]: Without dead ends: 36 [2024-10-13 10:31:53,995 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-10-13 10:31:53,997 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 16 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 10:31:53,997 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 57 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 10:31:53,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-10-13 10:31:54,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2024-10-13 10:31:54,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 25 states have (on average 1.72) internal successors, (43), 35 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:31:54,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2024-10-13 10:31:54,001 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 6 [2024-10-13 10:31:54,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:31:54,001 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2024-10-13 10:31:54,001 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:31:54,001 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2024-10-13 10:31:54,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-10-13 10:31:54,001 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:31:54,002 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:31:54,002 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-13 10:31:54,002 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-10-13 10:31:54,002 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:31:54,003 INFO L85 PathProgramCache]: Analyzing trace with hash 213406711, now seen corresponding path program 1 times [2024-10-13 10:31:54,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:31:54,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957751998] [2024-10-13 10:31:54,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:31:54,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:31:54,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:31:54,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:31:54,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:31:54,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957751998] [2024-10-13 10:31:54,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957751998] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 10:31:54,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 10:31:54,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-13 10:31:54,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287390669] [2024-10-13 10:31:54,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 10:31:54,041 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 10:31:54,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:31:54,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 10:31:54,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-13 10:31:54,042 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:31:54,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:31:54,071 INFO L93 Difference]: Finished difference Result 51 states and 61 transitions. [2024-10-13 10:31:54,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 10:31:54,071 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2024-10-13 10:31:54,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:31:54,072 INFO L225 Difference]: With dead ends: 51 [2024-10-13 10:31:54,072 INFO L226 Difference]: Without dead ends: 51 [2024-10-13 10:31:54,072 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-13 10:31:54,073 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 8 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 10:31:54,073 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 69 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 10:31:54,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-10-13 10:31:54,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 45. [2024-10-13 10:31:54,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 34 states have (on average 1.6176470588235294) internal successors, (55), 44 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:31:54,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 55 transitions. [2024-10-13 10:31:54,080 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 55 transitions. Word has length 8 [2024-10-13 10:31:54,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:31:54,080 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 55 transitions. [2024-10-13 10:31:54,080 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:31:54,081 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 55 transitions. [2024-10-13 10:31:54,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-10-13 10:31:54,081 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:31:54,081 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:31:54,082 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-13 10:31:54,082 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-10-13 10:31:54,082 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:31:54,083 INFO L85 PathProgramCache]: Analyzing trace with hash 270665013, now seen corresponding path program 1 times [2024-10-13 10:31:54,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:31:54,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216954772] [2024-10-13 10:31:54,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:31:54,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:31:54,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:31:54,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:31:54,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:31:54,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216954772] [2024-10-13 10:31:54,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216954772] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 10:31:54,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 10:31:54,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 10:31:54,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23621751] [2024-10-13 10:31:54,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 10:31:54,125 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 10:31:54,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:31:54,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 10:31:54,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 10:31:54,126 INFO L87 Difference]: Start difference. First operand 45 states and 55 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:31:54,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:31:54,149 INFO L93 Difference]: Finished difference Result 43 states and 53 transitions. [2024-10-13 10:31:54,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 10:31:54,149 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2024-10-13 10:31:54,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:31:54,150 INFO L225 Difference]: With dead ends: 43 [2024-10-13 10:31:54,150 INFO L226 Difference]: Without dead ends: 43 [2024-10-13 10:31:54,150 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 10:31:54,151 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 8 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 10:31:54,151 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 36 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 10:31:54,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-10-13 10:31:54,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2024-10-13 10:31:54,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 34 states have (on average 1.5588235294117647) internal successors, (53), 42 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:31:54,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 53 transitions. [2024-10-13 10:31:54,154 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 53 transitions. Word has length 8 [2024-10-13 10:31:54,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:31:54,154 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 53 transitions. [2024-10-13 10:31:54,154 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:31:54,154 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 53 transitions. [2024-10-13 10:31:54,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-10-13 10:31:54,155 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:31:54,155 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:31:54,155 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-13 10:31:54,155 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-10-13 10:31:54,155 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:31:54,156 INFO L85 PathProgramCache]: Analyzing trace with hash 270665014, now seen corresponding path program 1 times [2024-10-13 10:31:54,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:31:54,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999136508] [2024-10-13 10:31:54,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:31:54,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:31:54,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:31:54,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:31:54,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:31:54,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999136508] [2024-10-13 10:31:54,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999136508] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 10:31:54,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 10:31:54,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-13 10:31:54,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552128851] [2024-10-13 10:31:54,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 10:31:54,246 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-13 10:31:54,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:31:54,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-13 10:31:54,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-10-13 10:31:54,247 INFO L87 Difference]: Start difference. First operand 43 states and 53 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:31:54,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:31:54,295 INFO L93 Difference]: Finished difference Result 45 states and 56 transitions. [2024-10-13 10:31:54,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-13 10:31:54,296 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2024-10-13 10:31:54,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:31:54,296 INFO L225 Difference]: With dead ends: 45 [2024-10-13 10:31:54,296 INFO L226 Difference]: Without dead ends: 45 [2024-10-13 10:31:54,296 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-10-13 10:31:54,297 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 27 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 10:31:54,298 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 45 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 10:31:54,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-10-13 10:31:54,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2024-10-13 10:31:54,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 44 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) [2024-10-13 10:31:54,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 56 transitions. [2024-10-13 10:31:54,305 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 56 transitions. Word has length 8 [2024-10-13 10:31:54,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:31:54,306 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 56 transitions. [2024-10-13 10:31:54,306 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:31:54,306 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 56 transitions. [2024-10-13 10:31:54,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-10-13 10:31:54,306 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:31:54,306 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-10-13 10:31:54,306 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-13 10:31:54,307 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-10-13 10:31:54,307 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:31:54,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1988538428, now seen corresponding path program 1 times [2024-10-13 10:31:54,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:31:54,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065498512] [2024-10-13 10:31:54,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:31:54,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:31:54,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:31:54,436 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:31:54,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:31:54,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065498512] [2024-10-13 10:31:54,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065498512] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 10:31:54,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529776465] [2024-10-13 10:31:54,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:31:54,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:31:54,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 10:31:54,439 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 10:31:54,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-13 10:31:54,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:31:54,489 INFO L255 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-13 10:31:54,493 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 10:31:54,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-13 10:31:54,559 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2024-10-13 10:31:54,566 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-10-13 10:31:54,672 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:31:54,672 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 10:31:54,801 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-13 10:31:54,841 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:31:54,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529776465] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 10:31:54,843 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 10:31:54,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2024-10-13 10:31:54,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812962155] [2024-10-13 10:31:54,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 10:31:54,844 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-13 10:31:54,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:31:54,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-13 10:31:54,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2024-10-13 10:31:54,845 INFO L87 Difference]: Start difference. First operand 45 states and 56 transitions. Second operand has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:31:55,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:31:55,005 INFO L93 Difference]: Finished difference Result 46 states and 58 transitions. [2024-10-13 10:31:55,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-13 10:31:55,006 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-10-13 10:31:55,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:31:55,007 INFO L225 Difference]: With dead ends: 46 [2024-10-13 10:31:55,007 INFO L226 Difference]: Without dead ends: 46 [2024-10-13 10:31:55,007 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2024-10-13 10:31:55,008 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 10:31:55,008 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 101 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 10:31:55,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-10-13 10:31:55,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2024-10-13 10:31:55,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 32 states have (on average 1.5) internal successors, (48), 39 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:31:55,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2024-10-13 10:31:55,011 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 8 [2024-10-13 10:31:55,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:31:55,011 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2024-10-13 10:31:55,011 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:31:55,011 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2024-10-13 10:31:55,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-10-13 10:31:55,012 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:31:55,012 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:31:55,025 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-13 10:31:55,214 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:31:55,214 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-10-13 10:31:55,214 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:31:55,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1974328171, now seen corresponding path program 1 times [2024-10-13 10:31:55,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:31:55,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892420826] [2024-10-13 10:31:55,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:31:55,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:31:55,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:31:55,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:31:55,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:31:55,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892420826] [2024-10-13 10:31:55,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892420826] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 10:31:55,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 10:31:55,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 10:31:55,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109109703] [2024-10-13 10:31:55,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 10:31:55,286 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 10:31:55,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:31:55,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 10:31:55,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-13 10:31:55,287 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:31:55,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:31:55,309 INFO L93 Difference]: Finished difference Result 50 states and 60 transitions. [2024-10-13 10:31:55,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 10:31:55,310 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-10-13 10:31:55,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:31:55,312 INFO L225 Difference]: With dead ends: 50 [2024-10-13 10:31:55,313 INFO L226 Difference]: Without dead ends: 50 [2024-10-13 10:31:55,313 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-13 10:31:55,313 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 7 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 10:31:55,313 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 43 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 10:31:55,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-10-13 10:31:55,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2024-10-13 10:31:55,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 41 states have (on average 1.4634146341463414) internal successors, (60), 48 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:31:55,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 60 transitions. [2024-10-13 10:31:55,316 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 60 transitions. Word has length 9 [2024-10-13 10:31:55,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:31:55,316 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 60 transitions. [2024-10-13 10:31:55,316 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:31:55,316 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 60 transitions. [2024-10-13 10:31:55,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-10-13 10:31:55,316 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:31:55,316 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:31:55,316 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-13 10:31:55,317 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-10-13 10:31:55,317 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:31:55,317 INFO L85 PathProgramCache]: Analyzing trace with hash 1511292499, now seen corresponding path program 1 times [2024-10-13 10:31:55,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:31:55,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465010937] [2024-10-13 10:31:55,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:31:55,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:31:55,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:31:55,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:31:55,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:31:55,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465010937] [2024-10-13 10:31:55,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465010937] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 10:31:55,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 10:31:55,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 10:31:55,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005403348] [2024-10-13 10:31:55,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 10:31:55,388 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-13 10:31:55,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:31:55,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-13 10:31:55,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-10-13 10:31:55,392 INFO L87 Difference]: Start difference. First operand 49 states and 60 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:31:55,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:31:55,418 INFO L93 Difference]: Finished difference Result 48 states and 59 transitions. [2024-10-13 10:31:55,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-13 10:31:55,418 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-10-13 10:31:55,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:31:55,419 INFO L225 Difference]: With dead ends: 48 [2024-10-13 10:31:55,419 INFO L226 Difference]: Without dead ends: 48 [2024-10-13 10:31:55,419 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-10-13 10:31:55,420 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 6 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 10:31:55,420 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 53 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 10:31:55,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-10-13 10:31:55,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 39. [2024-10-13 10:31:55,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 32 states have (on average 1.46875) internal successors, (47), 38 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:31:55,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2024-10-13 10:31:55,424 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 9 [2024-10-13 10:31:55,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:31:55,424 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2024-10-13 10:31:55,424 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:31:55,424 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2024-10-13 10:31:55,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-10-13 10:31:55,425 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:31:55,425 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:31:55,425 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-13 10:31:55,425 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-10-13 10:31:55,426 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:31:55,426 INFO L85 PathProgramCache]: Analyzing trace with hash -1074631162, now seen corresponding path program 1 times [2024-10-13 10:31:55,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:31:55,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998504318] [2024-10-13 10:31:55,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:31:55,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:31:55,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:31:55,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:31:55,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:31:55,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998504318] [2024-10-13 10:31:55,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998504318] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 10:31:55,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 10:31:55,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 10:31:55,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224022218] [2024-10-13 10:31:55,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 10:31:55,494 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 10:31:55,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:31:55,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 10:31:55,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-13 10:31:55,494 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:31:55,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:31:55,514 INFO L93 Difference]: Finished difference Result 42 states and 50 transitions. [2024-10-13 10:31:55,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 10:31:55,515 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-10-13 10:31:55,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:31:55,515 INFO L225 Difference]: With dead ends: 42 [2024-10-13 10:31:55,515 INFO L226 Difference]: Without dead ends: 42 [2024-10-13 10:31:55,515 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-13 10:31:55,516 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 4 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 10:31:55,517 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 41 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 10:31:55,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-10-13 10:31:55,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2024-10-13 10:31:55,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 35 states have (on average 1.4285714285714286) internal successors, (50), 41 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:31:55,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2024-10-13 10:31:55,521 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 10 [2024-10-13 10:31:55,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:31:55,521 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2024-10-13 10:31:55,521 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:31:55,521 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2024-10-13 10:31:55,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-10-13 10:31:55,522 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:31:55,522 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:31:55,522 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-10-13 10:31:55,522 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-10-13 10:31:55,522 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:31:55,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1883977788, now seen corresponding path program 1 times [2024-10-13 10:31:55,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:31:55,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564563868] [2024-10-13 10:31:55,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:31:55,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:31:55,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:31:55,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:31:55,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:31:55,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564563868] [2024-10-13 10:31:55,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564563868] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 10:31:55,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 10:31:55,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 10:31:55,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510172824] [2024-10-13 10:31:55,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 10:31:55,592 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-13 10:31:55,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:31:55,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-13 10:31:55,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-10-13 10:31:55,593 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:31:55,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:31:55,616 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2024-10-13 10:31:55,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-13 10:31:55,616 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-10-13 10:31:55,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:31:55,617 INFO L225 Difference]: With dead ends: 41 [2024-10-13 10:31:55,617 INFO L226 Difference]: Without dead ends: 41 [2024-10-13 10:31:55,617 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-10-13 10:31:55,618 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 6 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 10:31:55,618 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 52 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 10:31:55,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-10-13 10:31:55,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2024-10-13 10:31:55,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 32 states have (on average 1.4375) internal successors, (46), 37 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:31:55,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2024-10-13 10:31:55,620 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 10 [2024-10-13 10:31:55,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:31:55,620 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2024-10-13 10:31:55,620 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:31:55,620 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2024-10-13 10:31:55,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-10-13 10:31:55,620 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:31:55,621 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:31:55,621 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-10-13 10:31:55,621 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-10-13 10:31:55,621 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:31:55,621 INFO L85 PathProgramCache]: Analyzing trace with hash -1883871471, now seen corresponding path program 1 times [2024-10-13 10:31:55,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:31:55,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943561560] [2024-10-13 10:31:55,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:31:55,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:31:55,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:31:55,741 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:31:55,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:31:55,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943561560] [2024-10-13 10:31:55,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943561560] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 10:31:55,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282807174] [2024-10-13 10:31:55,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:31:55,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:31:55,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 10:31:55,743 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 10:31:55,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-13 10:31:55,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:31:55,787 INFO L255 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-13 10:31:55,788 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 10:31:55,804 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2024-10-13 10:31:55,809 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-13 10:31:55,917 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:31:55,917 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 10:31:56,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:31:56,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282807174] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 10:31:56,031 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 10:31:56,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2024-10-13 10:31:56,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503939999] [2024-10-13 10:31:56,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 10:31:56,032 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-13 10:31:56,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:31:56,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-13 10:31:56,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2024-10-13 10:31:56,033 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand has 16 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:31:56,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:31:56,175 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2024-10-13 10:31:56,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-13 10:31:56,175 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.8) internal successors, (27), 15 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 10 [2024-10-13 10:31:56,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:31:56,176 INFO L225 Difference]: With dead ends: 38 [2024-10-13 10:31:56,176 INFO L226 Difference]: Without dead ends: 38 [2024-10-13 10:31:56,176 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2024-10-13 10:31:56,176 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 21 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 10:31:56,177 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 126 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 10:31:56,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-10-13 10:31:56,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2024-10-13 10:31:56,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.4) internal successors, (42), 34 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:31:56,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2024-10-13 10:31:56,178 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 10 [2024-10-13 10:31:56,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:31:56,178 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2024-10-13 10:31:56,178 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:31:56,178 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2024-10-13 10:31:56,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-10-13 10:31:56,179 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:31:56,179 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:31:56,191 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-13 10:31:56,383 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,SelfDestructingSolverStorable11 [2024-10-13 10:31:56,384 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-10-13 10:31:56,384 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:31:56,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1928350475, now seen corresponding path program 1 times [2024-10-13 10:31:56,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:31:56,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485943157] [2024-10-13 10:31:56,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:31:56,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:31:56,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:31:56,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:31:56,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:31:56,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485943157] [2024-10-13 10:31:56,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485943157] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 10:31:56,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 10:31:56,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-13 10:31:56,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821222672] [2024-10-13 10:31:56,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 10:31:56,435 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-13 10:31:56,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:31:56,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-13 10:31:56,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-13 10:31:56,436 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:31:56,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:31:56,463 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2024-10-13 10:31:56,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-13 10:31:56,463 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-10-13 10:31:56,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:31:56,463 INFO L225 Difference]: With dead ends: 34 [2024-10-13 10:31:56,463 INFO L226 Difference]: Without dead ends: 34 [2024-10-13 10:31:56,464 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-13 10:31:56,464 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 18 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 10:31:56,464 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 54 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 10:31:56,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-10-13 10:31:56,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2024-10-13 10:31:56,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 30 states have (on average 1.3666666666666667) internal successors, (41), 33 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:31:56,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2024-10-13 10:31:56,466 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 12 [2024-10-13 10:31:56,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:31:56,466 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2024-10-13 10:31:56,466 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:31:56,466 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2024-10-13 10:31:56,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-10-13 10:31:56,466 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:31:56,466 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:31:56,466 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-10-13 10:31:56,466 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-10-13 10:31:56,467 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:31:56,467 INFO L85 PathProgramCache]: Analyzing trace with hash -1928350474, now seen corresponding path program 1 times [2024-10-13 10:31:56,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:31:56,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738404024] [2024-10-13 10:31:56,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:31:56,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:31:56,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:31:56,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:31:56,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:31:56,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738404024] [2024-10-13 10:31:56,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738404024] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 10:31:56,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 10:31:56,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-13 10:31:56,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836904921] [2024-10-13 10:31:56,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 10:31:56,555 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-13 10:31:56,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:31:56,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-13 10:31:56,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-10-13 10:31:56,556 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:31:56,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:31:56,610 INFO L93 Difference]: Finished difference Result 47 states and 57 transitions. [2024-10-13 10:31:56,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-13 10:31:56,611 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-10-13 10:31:56,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:31:56,611 INFO L225 Difference]: With dead ends: 47 [2024-10-13 10:31:56,611 INFO L226 Difference]: Without dead ends: 47 [2024-10-13 10:31:56,611 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-10-13 10:31:56,612 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 16 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 10:31:56,612 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 85 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 10:31:56,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-10-13 10:31:56,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 36. [2024-10-13 10:31:56,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 32 states have (on average 1.34375) internal successors, (43), 35 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:31:56,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2024-10-13 10:31:56,613 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 12 [2024-10-13 10:31:56,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:31:56,613 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2024-10-13 10:31:56,613 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:31:56,613 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2024-10-13 10:31:56,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-10-13 10:31:56,614 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:31:56,614 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:31:56,614 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-10-13 10:31:56,614 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-10-13 10:31:56,614 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:31:56,615 INFO L85 PathProgramCache]: Analyzing trace with hash -2013867047, now seen corresponding path program 1 times [2024-10-13 10:31:56,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:31:56,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298414963] [2024-10-13 10:31:56,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:31:56,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:31:56,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:31:56,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:31:56,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:31:56,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298414963] [2024-10-13 10:31:56,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298414963] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 10:31:56,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 10:31:56,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-13 10:31:56,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534113934] [2024-10-13 10:31:56,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 10:31:56,673 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-13 10:31:56,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:31:56,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-13 10:31:56,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-13 10:31:56,674 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:31:56,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:31:56,703 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2024-10-13 10:31:56,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-13 10:31:56,704 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-10-13 10:31:56,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:31:56,704 INFO L225 Difference]: With dead ends: 35 [2024-10-13 10:31:56,704 INFO L226 Difference]: Without dead ends: 35 [2024-10-13 10:31:56,704 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-10-13 10:31:56,705 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 17 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 10:31:56,705 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 56 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 10:31:56,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-10-13 10:31:56,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2024-10-13 10:31:56,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 32 states have (on average 1.3125) internal successors, (42), 34 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:31:56,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2024-10-13 10:31:56,706 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 14 [2024-10-13 10:31:56,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:31:56,706 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2024-10-13 10:31:56,707 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:31:56,707 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2024-10-13 10:31:56,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-10-13 10:31:56,707 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:31:56,707 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:31:56,707 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-10-13 10:31:56,707 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-10-13 10:31:56,708 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:31:56,708 INFO L85 PathProgramCache]: Analyzing trace with hash -2013867046, now seen corresponding path program 1 times [2024-10-13 10:31:56,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:31:56,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682773345] [2024-10-13 10:31:56,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:31:56,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:31:56,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:31:56,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:31:56,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:31:56,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682773345] [2024-10-13 10:31:56,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682773345] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 10:31:56,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 10:31:56,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-13 10:31:56,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385193398] [2024-10-13 10:31:56,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 10:31:56,794 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-13 10:31:56,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:31:56,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-13 10:31:56,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-10-13 10:31:56,794 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:31:56,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:31:56,842 INFO L93 Difference]: Finished difference Result 37 states and 44 transitions. [2024-10-13 10:31:56,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-13 10:31:56,843 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-10-13 10:31:56,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:31:56,843 INFO L225 Difference]: With dead ends: 37 [2024-10-13 10:31:56,843 INFO L226 Difference]: Without dead ends: 37 [2024-10-13 10:31:56,843 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-10-13 10:31:56,844 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 19 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 10:31:56,844 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 58 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 10:31:56,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-10-13 10:31:56,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2024-10-13 10:31:56,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 34 states have (on average 1.2941176470588236) internal successors, (44), 36 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:31:56,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2024-10-13 10:31:56,846 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 14 [2024-10-13 10:31:56,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:31:56,846 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2024-10-13 10:31:56,846 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:31:56,846 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2024-10-13 10:31:56,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-10-13 10:31:56,846 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:31:56,846 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:31:56,847 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-10-13 10:31:56,847 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-10-13 10:31:56,847 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:31:56,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1285899945, now seen corresponding path program 1 times [2024-10-13 10:31:56,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:31:56,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320663315] [2024-10-13 10:31:56,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:31:56,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:31:56,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:31:56,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:31:56,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:31:56,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320663315] [2024-10-13 10:31:56,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320663315] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 10:31:56,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 10:31:56,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 10:31:56,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581119642] [2024-10-13 10:31:56,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 10:31:56,921 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 10:31:56,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:31:56,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 10:31:56,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-13 10:31:56,922 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:31:56,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:31:56,934 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2024-10-13 10:31:56,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 10:31:56,935 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2024-10-13 10:31:56,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:31:56,935 INFO L225 Difference]: With dead ends: 36 [2024-10-13 10:31:56,935 INFO L226 Difference]: Without dead ends: 34 [2024-10-13 10:31:56,935 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-13 10:31:56,936 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 11 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 10:31:56,936 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 36 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 10:31:56,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-10-13 10:31:56,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2024-10-13 10:31:56,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 32 states have (on average 1.28125) internal successors, (41), 33 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:31:56,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2024-10-13 10:31:56,937 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 17 [2024-10-13 10:31:56,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:31:56,937 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2024-10-13 10:31:56,937 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:31:56,937 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2024-10-13 10:31:56,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-10-13 10:31:56,938 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:31:56,938 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:31:56,938 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-10-13 10:31:56,938 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-10-13 10:31:56,938 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:31:56,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1208229212, now seen corresponding path program 1 times [2024-10-13 10:31:56,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:31:56,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451414624] [2024-10-13 10:31:56,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:31:56,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:31:56,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:31:57,047 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:31:57,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:31:57,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451414624] [2024-10-13 10:31:57,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451414624] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 10:31:57,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 10:31:57,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-10-13 10:31:57,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358364713] [2024-10-13 10:31:57,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 10:31:57,048 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-13 10:31:57,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:31:57,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-13 10:31:57,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-10-13 10:31:57,049 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:31:57,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:31:57,098 INFO L93 Difference]: Finished difference Result 51 states and 59 transitions. [2024-10-13 10:31:57,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-13 10:31:57,098 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2024-10-13 10:31:57,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:31:57,098 INFO L225 Difference]: With dead ends: 51 [2024-10-13 10:31:57,098 INFO L226 Difference]: Without dead ends: 51 [2024-10-13 10:31:57,099 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-10-13 10:31:57,099 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 6 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 10:31:57,099 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 102 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 10:31:57,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-10-13 10:31:57,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2024-10-13 10:31:57,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 48 states have (on average 1.2291666666666667) internal successors, (59), 49 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:31:57,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 59 transitions. [2024-10-13 10:31:57,101 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 59 transitions. Word has length 18 [2024-10-13 10:31:57,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:31:57,101 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 59 transitions. [2024-10-13 10:31:57,101 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:31:57,101 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 59 transitions. [2024-10-13 10:31:57,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-10-13 10:31:57,102 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:31:57,102 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:31:57,102 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-10-13 10:31:57,102 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-10-13 10:31:57,102 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:31:57,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1208231390, now seen corresponding path program 1 times [2024-10-13 10:31:57,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:31:57,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668046146] [2024-10-13 10:31:57,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:31:57,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:31:57,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:31:57,222 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:31:57,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:31:57,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668046146] [2024-10-13 10:31:57,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668046146] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 10:31:57,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 10:31:57,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-10-13 10:31:57,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239640027] [2024-10-13 10:31:57,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 10:31:57,223 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-13 10:31:57,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:31:57,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-13 10:31:57,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-10-13 10:31:57,224 INFO L87 Difference]: Start difference. First operand 50 states and 59 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:31:57,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:31:57,282 INFO L93 Difference]: Finished difference Result 66 states and 73 transitions. [2024-10-13 10:31:57,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-13 10:31:57,283 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2024-10-13 10:31:57,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:31:57,283 INFO L225 Difference]: With dead ends: 66 [2024-10-13 10:31:57,283 INFO L226 Difference]: Without dead ends: 41 [2024-10-13 10:31:57,283 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-10-13 10:31:57,284 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 7 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 10:31:57,284 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 89 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 10:31:57,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-10-13 10:31:57,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2024-10-13 10:31:57,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 39 states have (on average 1.205128205128205) internal successors, (47), 40 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:31:57,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2024-10-13 10:31:57,285 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 18 [2024-10-13 10:31:57,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:31:57,286 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2024-10-13 10:31:57,286 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:31:57,286 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2024-10-13 10:31:57,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-10-13 10:31:57,286 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:31:57,287 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:31:57,287 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-10-13 10:31:57,287 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-10-13 10:31:57,287 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:31:57,287 INFO L85 PathProgramCache]: Analyzing trace with hash 187163036, now seen corresponding path program 1 times [2024-10-13 10:31:57,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:31:57,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412302346] [2024-10-13 10:31:57,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:31:57,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:31:57,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:31:57,401 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:31:57,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:31:57,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412302346] [2024-10-13 10:31:57,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412302346] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 10:31:57,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 10:31:57,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-10-13 10:31:57,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457614373] [2024-10-13 10:31:57,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 10:31:57,402 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-13 10:31:57,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:31:57,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-13 10:31:57,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-10-13 10:31:57,403 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:31:57,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:31:57,454 INFO L93 Difference]: Finished difference Result 61 states and 67 transitions. [2024-10-13 10:31:57,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-13 10:31:57,455 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2024-10-13 10:31:57,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:31:57,455 INFO L225 Difference]: With dead ends: 61 [2024-10-13 10:31:57,455 INFO L226 Difference]: Without dead ends: 45 [2024-10-13 10:31:57,455 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-10-13 10:31:57,455 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 22 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 10:31:57,456 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 82 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 10:31:57,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-10-13 10:31:57,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2024-10-13 10:31:57,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 41 states have (on average 1.1951219512195121) internal successors, (49), 42 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:31:57,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2024-10-13 10:31:57,457 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 18 [2024-10-13 10:31:57,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:31:57,457 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2024-10-13 10:31:57,457 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:31:57,457 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2024-10-13 10:31:57,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-10-13 10:31:57,457 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:31:57,457 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:31:57,457 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-10-13 10:31:57,457 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-10-13 10:31:57,458 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:31:57,458 INFO L85 PathProgramCache]: Analyzing trace with hash 689696183, now seen corresponding path program 1 times [2024-10-13 10:31:57,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:31:57,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102590588] [2024-10-13 10:31:57,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:31:57,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:31:57,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:31:57,658 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:31:57,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:31:57,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102590588] [2024-10-13 10:31:57,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102590588] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 10:31:57,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129264250] [2024-10-13 10:31:57,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:31:57,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:31:57,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 10:31:57,660 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 10:31:57,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-13 10:31:57,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:31:57,729 INFO L255 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-10-13 10:31:57,730 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 10:31:57,815 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:31:57,816 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 10:31:57,926 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-10-13 10:31:57,947 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:31:57,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129264250] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 10:31:57,947 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 10:31:57,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2024-10-13 10:31:57,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440366589] [2024-10-13 10:31:57,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 10:31:57,948 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-13 10:31:57,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:31:57,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-13 10:31:57,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2024-10-13 10:31:57,949 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand has 21 states, 20 states have (on average 2.1) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:31:58,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:31:58,113 INFO L93 Difference]: Finished difference Result 56 states and 63 transitions. [2024-10-13 10:31:58,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-13 10:31:58,114 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.1) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2024-10-13 10:31:58,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:31:58,114 INFO L225 Difference]: With dead ends: 56 [2024-10-13 10:31:58,114 INFO L226 Difference]: Without dead ends: 56 [2024-10-13 10:31:58,115 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2024-10-13 10:31:58,115 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 26 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 10:31:58,115 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 151 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 10:31:58,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-10-13 10:31:58,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 51. [2024-10-13 10:31:58,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 49 states have (on average 1.183673469387755) internal successors, (58), 50 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:31:58,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2024-10-13 10:31:58,116 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 20 [2024-10-13 10:31:58,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:31:58,117 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2024-10-13 10:31:58,117 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.1) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:31:58,117 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2024-10-13 10:31:58,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-10-13 10:31:58,117 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:31:58,119 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:31:58,133 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-13 10:31:58,323 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:31:58,325 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-10-13 10:31:58,325 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:31:58,325 INFO L85 PathProgramCache]: Analyzing trace with hash -999249737, now seen corresponding path program 1 times [2024-10-13 10:31:58,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:31:58,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736382912] [2024-10-13 10:31:58,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:31:58,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:31:58,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:31:58,454 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 10:31:58,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:31:58,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736382912] [2024-10-13 10:31:58,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736382912] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 10:31:58,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 10:31:58,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-10-13 10:31:58,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087603340] [2024-10-13 10:31:58,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 10:31:58,456 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-13 10:31:58,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:31:58,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-13 10:31:58,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-10-13 10:31:58,457 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:31:58,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:31:58,512 INFO L93 Difference]: Finished difference Result 73 states and 82 transitions. [2024-10-13 10:31:58,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-13 10:31:58,512 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2024-10-13 10:31:58,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:31:58,512 INFO L225 Difference]: With dead ends: 73 [2024-10-13 10:31:58,512 INFO L226 Difference]: Without dead ends: 73 [2024-10-13 10:31:58,513 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-10-13 10:31:58,513 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 14 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 10:31:58,513 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 82 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 10:31:58,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-10-13 10:31:58,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 52. [2024-10-13 10:31:58,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 50 states have (on average 1.2) internal successors, (60), 51 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:31:58,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2024-10-13 10:31:58,514 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 20 [2024-10-13 10:31:58,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:31:58,515 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2024-10-13 10:31:58,515 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:31:58,515 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2024-10-13 10:31:58,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-10-13 10:31:58,515 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:31:58,515 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] [2024-10-13 10:31:58,516 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-10-13 10:31:58,516 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-10-13 10:31:58,517 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:31:58,517 INFO L85 PathProgramCache]: Analyzing trace with hash -2048927323, now seen corresponding path program 1 times [2024-10-13 10:31:58,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:31:58,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779323817] [2024-10-13 10:31:58,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:31:58,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:31:58,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:31:58,674 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 10:31:58,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:31:58,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779323817] [2024-10-13 10:31:58,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779323817] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 10:31:58,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744845595] [2024-10-13 10:31:58,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:31:58,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:31:58,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 10:31:58,676 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 10:31:58,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-13 10:31:58,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:31:58,738 INFO L255 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-10-13 10:31:58,739 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 10:31:58,815 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 10:31:58,815 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 10:31:58,913 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-10-13 10:31:58,936 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 10:31:58,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744845595] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 10:31:58,936 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 10:31:58,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2024-10-13 10:31:58,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074422245] [2024-10-13 10:31:58,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 10:31:58,937 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-13 10:31:58,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:31:58,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-13 10:31:58,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2024-10-13 10:31:58,938 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand has 20 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:31:59,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:31:59,082 INFO L93 Difference]: Finished difference Result 66 states and 76 transitions. [2024-10-13 10:31:59,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-13 10:31:59,082 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 20 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) Word has length 22 [2024-10-13 10:31:59,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:31:59,083 INFO L225 Difference]: With dead ends: 66 [2024-10-13 10:31:59,083 INFO L226 Difference]: Without dead ends: 66 [2024-10-13 10:31:59,083 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2024-10-13 10:31:59,083 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 7 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 10:31:59,084 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 239 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 10:31:59,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-10-13 10:31:59,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2024-10-13 10:31:59,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 62 states have (on average 1.2096774193548387) internal successors, (75), 63 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:31:59,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 75 transitions. [2024-10-13 10:31:59,085 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 75 transitions. Word has length 22 [2024-10-13 10:31:59,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:31:59,085 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 75 transitions. [2024-10-13 10:31:59,085 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:31:59,085 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 75 transitions. [2024-10-13 10:31:59,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-10-13 10:31:59,086 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:31:59,086 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:31:59,098 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-13 10:31:59,290 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:31:59,291 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-10-13 10:31:59,291 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:31:59,291 INFO L85 PathProgramCache]: Analyzing trace with hash 991889723, now seen corresponding path program 2 times [2024-10-13 10:31:59,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:31:59,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194002830] [2024-10-13 10:31:59,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:31:59,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:31:59,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:31:59,485 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:31:59,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:31:59,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194002830] [2024-10-13 10:31:59,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194002830] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 10:31:59,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288826644] [2024-10-13 10:31:59,486 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 10:31:59,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:31:59,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 10:31:59,487 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 10:31:59,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-13 10:31:59,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 10:31:59,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 10:31:59,554 INFO L255 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-10-13 10:31:59,556 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 10:31:59,689 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-13 10:31:59,720 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-13 10:31:59,860 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:31:59,861 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 10:32:00,065 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-10-13 10:32:00,068 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-10-13 10:32:00,271 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:32:00,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288826644] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 10:32:00,272 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 10:32:00,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16, 14] total 35 [2024-10-13 10:32:00,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234003900] [2024-10-13 10:32:00,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 10:32:00,273 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-10-13 10:32:00,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:32:00,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-10-13 10:32:00,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1037, Unknown=0, NotChecked=0, Total=1190 [2024-10-13 10:32:00,273 INFO L87 Difference]: Start difference. First operand 64 states and 75 transitions. Second operand has 35 states, 35 states have (on average 1.6) internal successors, (56), 35 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) [2024-10-13 10:32:00,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:32:00,594 INFO L93 Difference]: Finished difference Result 120 states and 134 transitions. [2024-10-13 10:32:00,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-10-13 10:32:00,595 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6) internal successors, (56), 35 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 24 [2024-10-13 10:32:00,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:32:00,595 INFO L225 Difference]: With dead ends: 120 [2024-10-13 10:32:00,595 INFO L226 Difference]: Without dead ends: 97 [2024-10-13 10:32:00,596 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=228, Invalid=1664, Unknown=0, NotChecked=0, Total=1892 [2024-10-13 10:32:00,597 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 53 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-13 10:32:00,597 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 180 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-13 10:32:00,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2024-10-13 10:32:00,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 85. [2024-10-13 10:32:00,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 83 states have (on average 1.180722891566265) internal successors, (98), 84 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:32:00,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 98 transitions. [2024-10-13 10:32:00,599 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 98 transitions. Word has length 24 [2024-10-13 10:32:00,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:32:00,599 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 98 transitions. [2024-10-13 10:32:00,599 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.6) internal successors, (56), 35 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) [2024-10-13 10:32:00,599 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 98 transitions. [2024-10-13 10:32:00,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-10-13 10:32:00,601 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:32:00,601 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:32:00,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-10-13 10:32:00,805 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,SelfDestructingSolverStorable23 [2024-10-13 10:32:00,806 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-10-13 10:32:00,806 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:32:00,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1898075414, now seen corresponding path program 3 times [2024-10-13 10:32:00,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:32:00,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396416233] [2024-10-13 10:32:00,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:32:00,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:32:00,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:32:01,005 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:32:01,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:32:01,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396416233] [2024-10-13 10:32:01,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396416233] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 10:32:01,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710748030] [2024-10-13 10:32:01,006 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-13 10:32:01,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:32:01,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 10:32:01,008 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 10:32:01,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-13 10:32:01,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-13 10:32:01,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 10:32:01,072 INFO L255 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-10-13 10:32:01,074 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 10:32:01,186 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:32:01,186 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 10:32:01,292 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 21 treesize of output 17 [2024-10-13 10:32:01,380 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:32:01,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710748030] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 10:32:01,380 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 10:32:01,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2024-10-13 10:32:01,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239704757] [2024-10-13 10:32:01,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 10:32:01,381 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-10-13 10:32:01,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:32:01,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-10-13 10:32:01,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2024-10-13 10:32:01,382 INFO L87 Difference]: Start difference. First operand 85 states and 98 transitions. Second operand has 27 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:32:01,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:32:01,588 INFO L93 Difference]: Finished difference Result 108 states and 122 transitions. [2024-10-13 10:32:01,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-13 10:32:01,589 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 27 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 26 [2024-10-13 10:32:01,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:32:01,589 INFO L225 Difference]: With dead ends: 108 [2024-10-13 10:32:01,589 INFO L226 Difference]: Without dead ends: 108 [2024-10-13 10:32:01,590 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=168, Invalid=954, Unknown=0, NotChecked=0, Total=1122 [2024-10-13 10:32:01,590 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 44 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 10:32:01,590 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 176 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 10:32:01,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2024-10-13 10:32:01,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 97. [2024-10-13 10:32:01,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 95 states have (on average 1.1789473684210525) internal successors, (112), 96 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:32:01,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 112 transitions. [2024-10-13 10:32:01,592 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 112 transitions. Word has length 26 [2024-10-13 10:32:01,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:32:01,593 INFO L471 AbstractCegarLoop]: Abstraction has 97 states and 112 transitions. [2024-10-13 10:32:01,593 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:32:01,593 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 112 transitions. [2024-10-13 10:32:01,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-10-13 10:32:01,593 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:32:01,593 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] [2024-10-13 10:32:01,606 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-13 10:32:01,797 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:32:01,798 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-10-13 10:32:01,798 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:32:01,798 INFO L85 PathProgramCache]: Analyzing trace with hash -292830517, now seen corresponding path program 2 times [2024-10-13 10:32:01,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:32:01,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311334002] [2024-10-13 10:32:01,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:32:01,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:32:01,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:32:02,049 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 10:32:02,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:32:02,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311334002] [2024-10-13 10:32:02,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311334002] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 10:32:02,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689897079] [2024-10-13 10:32:02,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 10:32:02,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:32:02,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 10:32:02,052 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 10:32:02,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-13 10:32:02,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 10:32:02,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 10:32:02,118 INFO L255 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-10-13 10:32:02,120 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 10:32:02,170 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-10-13 10:32:02,225 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 10:32:02,225 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 10:32:02,243 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-10-13 10:32:02,244 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-10-13 10:32:02,285 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 10:32:02,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689897079] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 10:32:02,286 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 10:32:02,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 22 [2024-10-13 10:32:02,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624243711] [2024-10-13 10:32:02,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 10:32:02,286 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-13 10:32:02,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:32:02,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-13 10:32:02,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2024-10-13 10:32:02,287 INFO L87 Difference]: Start difference. First operand 97 states and 112 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:32:02,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:32:02,471 INFO L93 Difference]: Finished difference Result 158 states and 178 transitions. [2024-10-13 10:32:02,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-13 10:32:02,471 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2024-10-13 10:32:02,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:32:02,472 INFO L225 Difference]: With dead ends: 158 [2024-10-13 10:32:02,472 INFO L226 Difference]: Without dead ends: 143 [2024-10-13 10:32:02,472 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2024-10-13 10:32:02,473 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 6 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 10:32:02,473 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 358 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 10:32:02,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2024-10-13 10:32:02,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 124. [2024-10-13 10:32:02,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 122 states have (on average 1.1885245901639345) internal successors, (145), 123 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:32:02,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 145 transitions. [2024-10-13 10:32:02,475 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 145 transitions. Word has length 28 [2024-10-13 10:32:02,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:32:02,475 INFO L471 AbstractCegarLoop]: Abstraction has 124 states and 145 transitions. [2024-10-13 10:32:02,476 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:32:02,476 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 145 transitions. [2024-10-13 10:32:02,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-10-13 10:32:02,476 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:32:02,476 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:32:02,490 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-13 10:32:02,676 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:32:02,677 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-10-13 10:32:02,677 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:32:02,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1059804902, now seen corresponding path program 4 times [2024-10-13 10:32:02,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:32:02,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394451021] [2024-10-13 10:32:02,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:32:02,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:32:02,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:32:02,901 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:32:02,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:32:02,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394451021] [2024-10-13 10:32:02,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394451021] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 10:32:02,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456996792] [2024-10-13 10:32:02,901 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-13 10:32:02,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:32:02,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 10:32:02,903 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 10:32:02,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-13 10:32:02,963 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-13 10:32:02,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 10:32:02,964 INFO L255 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 60 conjuncts are in the unsatisfiable core [2024-10-13 10:32:02,966 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 10:32:03,076 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-13 10:32:03,098 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-10-13 10:32:03,531 INFO L349 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2024-10-13 10:32:03,531 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 26 [2024-10-13 10:32:03,535 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:32:03,535 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 10:32:03,784 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 38 [2024-10-13 10:32:03,791 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 10:32:03,791 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 34 [2024-10-13 10:32:04,000 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:32:04,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456996792] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 10:32:04,000 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 10:32:04,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 20, 17] total 44 [2024-10-13 10:32:04,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432174703] [2024-10-13 10:32:04,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 10:32:04,001 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-10-13 10:32:04,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:32:04,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-10-13 10:32:04,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=1692, Unknown=0, NotChecked=0, Total=1892 [2024-10-13 10:32:04,002 INFO L87 Difference]: Start difference. First operand 124 states and 145 transitions. Second operand has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 44 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:32:05,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:32:05,074 INFO L93 Difference]: Finished difference Result 223 states and 250 transitions. [2024-10-13 10:32:05,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-10-13 10:32:05,075 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 44 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 30 [2024-10-13 10:32:05,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:32:05,075 INFO L225 Difference]: With dead ends: 223 [2024-10-13 10:32:05,076 INFO L226 Difference]: Without dead ends: 176 [2024-10-13 10:32:05,077 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1471 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=578, Invalid=5122, Unknown=0, NotChecked=0, Total=5700 [2024-10-13 10:32:05,077 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 101 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-13 10:32:05,077 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 211 Invalid, 570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 568 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-13 10:32:05,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2024-10-13 10:32:05,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 155. [2024-10-13 10:32:05,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 153 states have (on average 1.1764705882352942) internal successors, (180), 154 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:32:05,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 180 transitions. [2024-10-13 10:32:05,080 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 180 transitions. Word has length 30 [2024-10-13 10:32:05,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:32:05,080 INFO L471 AbstractCegarLoop]: Abstraction has 155 states and 180 transitions. [2024-10-13 10:32:05,080 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 44 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:32:05,080 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 180 transitions. [2024-10-13 10:32:05,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-10-13 10:32:05,081 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:32:05,081 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] [2024-10-13 10:32:05,093 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-13 10:32:05,284 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-10-13 10:32:05,285 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-10-13 10:32:05,285 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:32:05,285 INFO L85 PathProgramCache]: Analyzing trace with hash 2104108473, now seen corresponding path program 3 times [2024-10-13 10:32:05,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:32:05,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511875793] [2024-10-13 10:32:05,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:32:05,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:32:05,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:32:05,479 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 10:32:05,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:32:05,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511875793] [2024-10-13 10:32:05,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511875793] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 10:32:05,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73189021] [2024-10-13 10:32:05,480 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-13 10:32:05,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:32:05,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 10:32:05,481 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 10:32:05,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-13 10:32:05,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-13 10:32:05,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 10:32:05,553 INFO L255 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-10-13 10:32:05,554 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 10:32:05,667 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 10:32:05,667 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 10:32:05,782 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 21 treesize of output 17 [2024-10-13 10:32:05,853 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 10:32:05,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73189021] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 10:32:05,854 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 10:32:05,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 23 [2024-10-13 10:32:05,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935689340] [2024-10-13 10:32:05,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 10:32:05,854 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-13 10:32:05,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:32:05,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-13 10:32:05,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2024-10-13 10:32:05,855 INFO L87 Difference]: Start difference. First operand 155 states and 180 transitions. Second operand has 24 states, 23 states have (on average 3.130434782608696) internal successors, (72), 24 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:32:06,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:32:06,012 INFO L93 Difference]: Finished difference Result 189 states and 217 transitions. [2024-10-13 10:32:06,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-13 10:32:06,012 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.130434782608696) internal successors, (72), 24 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) Word has length 30 [2024-10-13 10:32:06,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:32:06,013 INFO L225 Difference]: With dead ends: 189 [2024-10-13 10:32:06,013 INFO L226 Difference]: Without dead ends: 189 [2024-10-13 10:32:06,014 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2024-10-13 10:32:06,014 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 10 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 10:32:06,014 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 270 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 10:32:06,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2024-10-13 10:32:06,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 187. [2024-10-13 10:32:06,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 185 states have (on average 1.172972972972973) internal successors, (217), 186 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:32:06,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 217 transitions. [2024-10-13 10:32:06,017 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 217 transitions. Word has length 30 [2024-10-13 10:32:06,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:32:06,017 INFO L471 AbstractCegarLoop]: Abstraction has 187 states and 217 transitions. [2024-10-13 10:32:06,017 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.130434782608696) internal successors, (72), 24 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:32:06,017 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 217 transitions. [2024-10-13 10:32:06,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-10-13 10:32:06,017 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:32:06,018 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:32:06,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-10-13 10:32:06,218 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-10-13 10:32:06,218 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-10-13 10:32:06,219 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:32:06,219 INFO L85 PathProgramCache]: Analyzing trace with hash -588749643, now seen corresponding path program 5 times [2024-10-13 10:32:06,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:32:06,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779069378] [2024-10-13 10:32:06,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:32:06,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:32:06,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:32:06,503 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:32:06,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:32:06,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779069378] [2024-10-13 10:32:06,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779069378] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 10:32:06,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020984622] [2024-10-13 10:32:06,505 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-13 10:32:06,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:32:06,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 10:32:06,506 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 10:32:06,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-13 10:32:06,574 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-10-13 10:32:06,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 10:32:06,575 INFO L255 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-10-13 10:32:06,577 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 10:32:06,582 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-13 10:32:06,737 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:32:06,738 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 10:32:07,018 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:32:07,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020984622] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 10:32:07,019 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 10:32:07,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 31 [2024-10-13 10:32:07,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155195289] [2024-10-13 10:32:07,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 10:32:07,019 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-10-13 10:32:07,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:32:07,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-10-13 10:32:07,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=857, Unknown=0, NotChecked=0, Total=992 [2024-10-13 10:32:07,020 INFO L87 Difference]: Start difference. First operand 187 states and 217 transitions. Second operand has 32 states, 31 states have (on average 2.5161290322580645) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:32:07,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:32:07,292 INFO L93 Difference]: Finished difference Result 235 states and 268 transitions. [2024-10-13 10:32:07,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-13 10:32:07,292 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.5161290322580645) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2024-10-13 10:32:07,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:32:07,293 INFO L225 Difference]: With dead ends: 235 [2024-10-13 10:32:07,293 INFO L226 Difference]: Without dead ends: 235 [2024-10-13 10:32:07,293 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=224, Invalid=1416, Unknown=0, NotChecked=0, Total=1640 [2024-10-13 10:32:07,294 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 121 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-13 10:32:07,294 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 268 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-13 10:32:07,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2024-10-13 10:32:07,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 207. [2024-10-13 10:32:07,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 205 states have (on average 1.175609756097561) internal successors, (241), 206 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:32:07,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 241 transitions. [2024-10-13 10:32:07,302 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 241 transitions. Word has length 32 [2024-10-13 10:32:07,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:32:07,302 INFO L471 AbstractCegarLoop]: Abstraction has 207 states and 241 transitions. [2024-10-13 10:32:07,302 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.5161290322580645) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:32:07,302 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 241 transitions. [2024-10-13 10:32:07,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-10-13 10:32:07,303 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:32:07,303 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:32:07,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-10-13 10:32:07,503 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,SelfDestructingSolverStorable28 [2024-10-13 10:32:07,503 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-10-13 10:32:07,503 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:32:07,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1245982407, now seen corresponding path program 6 times [2024-10-13 10:32:07,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:32:07,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109120594] [2024-10-13 10:32:07,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:32:07,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:32:07,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:32:07,810 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 11 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:32:07,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:32:07,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109120594] [2024-10-13 10:32:07,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109120594] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 10:32:07,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11087467] [2024-10-13 10:32:07,811 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-13 10:32:07,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:32:07,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 10:32:07,812 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 10:32:07,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-13 10:32:07,890 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-10-13 10:32:07,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 10:32:07,891 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 68 conjuncts are in the unsatisfiable core [2024-10-13 10:32:07,893 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 10:32:08,042 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-13 10:32:08,065 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-10-13 10:32:08,134 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-13 10:32:08,136 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 10:32:08,136 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 10 [2024-10-13 10:32:08,303 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:32:08,303 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 10:32:08,489 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 19 treesize of output 17 [2024-10-13 10:32:08,492 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 28 treesize of output 24 [2024-10-13 10:32:08,547 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2024-10-13 10:32:08,549 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 20 [2024-10-13 10:32:08,863 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:32:08,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11087467] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 10:32:08,863 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 10:32:08,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19, 19] total 50 [2024-10-13 10:32:08,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697772501] [2024-10-13 10:32:08,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 10:32:08,864 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-10-13 10:32:08,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:32:08,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-10-13 10:32:08,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=2291, Unknown=0, NotChecked=0, Total=2450 [2024-10-13 10:32:08,865 INFO L87 Difference]: Start difference. First operand 207 states and 241 transitions. Second operand has 50 states, 50 states have (on average 2.0) internal successors, (100), 50 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:32:09,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:32:09,929 INFO L93 Difference]: Finished difference Result 366 states and 411 transitions. [2024-10-13 10:32:09,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-10-13 10:32:09,930 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.0) internal successors, (100), 50 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2024-10-13 10:32:09,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:32:09,931 INFO L225 Difference]: With dead ends: 366 [2024-10-13 10:32:09,931 INFO L226 Difference]: Without dead ends: 291 [2024-10-13 10:32:09,932 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1652 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=414, Invalid=6228, Unknown=0, NotChecked=0, Total=6642 [2024-10-13 10:32:09,932 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 71 mSDsluCounter, 562 mSDsCounter, 0 mSdLazyCounter, 1251 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 583 SdHoareTripleChecker+Invalid, 1258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-13 10:32:09,932 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 583 Invalid, 1258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1251 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-13 10:32:09,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2024-10-13 10:32:09,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 260. [2024-10-13 10:32:09,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 258 states have (on average 1.1705426356589148) internal successors, (302), 259 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:32:09,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 302 transitions. [2024-10-13 10:32:09,938 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 302 transitions. Word has length 36 [2024-10-13 10:32:09,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:32:09,938 INFO L471 AbstractCegarLoop]: Abstraction has 260 states and 302 transitions. [2024-10-13 10:32:09,938 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.0) internal successors, (100), 50 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:32:09,938 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 302 transitions. [2024-10-13 10:32:09,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-10-13 10:32:09,939 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:32:09,939 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:32:09,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-10-13 10:32:10,143 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:32:10,144 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-10-13 10:32:10,144 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:32:10,144 INFO L85 PathProgramCache]: Analyzing trace with hash 304721887, now seen corresponding path program 4 times [2024-10-13 10:32:10,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:32:10,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756440196] [2024-10-13 10:32:10,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:32:10,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:32:10,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:32:11,008 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:32:11,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:32:11,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756440196] [2024-10-13 10:32:11,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756440196] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 10:32:11,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258758311] [2024-10-13 10:32:11,009 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-13 10:32:11,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:32:11,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 10:32:11,010 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 10:32:11,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-13 10:32:11,091 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-13 10:32:11,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 10:32:11,093 INFO L255 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 77 conjuncts are in the unsatisfiable core [2024-10-13 10:32:11,094 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 10:32:11,128 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-10-13 10:32:12,524 INFO L349 Elim1Store]: treesize reduction 8, result has 75.8 percent of original size [2024-10-13 10:32:12,524 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 3 case distinctions, treesize of input 43 treesize of output 42 [2024-10-13 10:32:12,650 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 16 treesize of output 8 [2024-10-13 10:32:12,766 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 14 refuted. 1 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-13 10:32:12,766 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 10:32:13,146 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 10:32:13,146 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2024-10-13 10:32:13,806 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 57 treesize of output 49 [2024-10-13 10:32:13,812 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 104 [2024-10-13 10:32:13,819 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-10-13 10:32:13,858 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-13 10:32:13,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258758311] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 10:32:13,858 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 10:32:13,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 20, 20] total 61 [2024-10-13 10:32:13,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884166775] [2024-10-13 10:32:13,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 10:32:13,859 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2024-10-13 10:32:13,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:32:13,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2024-10-13 10:32:13,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=3407, Unknown=1, NotChecked=0, Total=3660 [2024-10-13 10:32:13,860 INFO L87 Difference]: Start difference. First operand 260 states and 302 transitions. Second operand has 61 states, 61 states have (on average 1.4918032786885247) internal successors, (91), 61 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:32:17,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:32:17,282 INFO L93 Difference]: Finished difference Result 357 states and 403 transitions. [2024-10-13 10:32:17,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2024-10-13 10:32:17,283 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.4918032786885247) internal successors, (91), 61 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2024-10-13 10:32:17,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:32:17,283 INFO L225 Difference]: With dead ends: 357 [2024-10-13 10:32:17,283 INFO L226 Difference]: Without dead ends: 197 [2024-10-13 10:32:17,285 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2127 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=724, Invalid=9577, Unknown=1, NotChecked=0, Total=10302 [2024-10-13 10:32:17,286 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 31 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 1416 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 1434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-10-13 10:32:17,286 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 195 Invalid, 1434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1416 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-10-13 10:32:17,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2024-10-13 10:32:17,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 112. [2024-10-13 10:32:17,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.162162162162162) internal successors, (129), 111 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:32:17,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 129 transitions. [2024-10-13 10:32:17,289 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 129 transitions. Word has length 36 [2024-10-13 10:32:17,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:32:17,289 INFO L471 AbstractCegarLoop]: Abstraction has 112 states and 129 transitions. [2024-10-13 10:32:17,289 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.4918032786885247) internal successors, (91), 61 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:32:17,289 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 129 transitions. [2024-10-13 10:32:17,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-10-13 10:32:17,289 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:32:17,289 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:32:17,302 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-10-13 10:32:17,489 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:32:17,490 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-10-13 10:32:17,490 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:32:17,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1815948436, now seen corresponding path program 7 times [2024-10-13 10:32:17,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:32:17,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122551192] [2024-10-13 10:32:17,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:32:17,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:32:17,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:32:17,821 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 4 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:32:17,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:32:17,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122551192] [2024-10-13 10:32:17,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122551192] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 10:32:17,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268701548] [2024-10-13 10:32:17,821 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-13 10:32:17,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:32:17,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 10:32:17,823 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 10:32:17,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-13 10:32:17,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:32:17,915 INFO L255 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-10-13 10:32:17,916 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 10:32:18,040 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 9 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:32:18,040 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 10:32:18,195 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-10-13 10:32:18,257 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 9 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:32:18,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268701548] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 10:32:18,258 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 10:32:18,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 31 [2024-10-13 10:32:18,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578214871] [2024-10-13 10:32:18,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 10:32:18,258 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-10-13 10:32:18,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:32:18,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-10-13 10:32:18,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=875, Unknown=0, NotChecked=0, Total=992 [2024-10-13 10:32:18,259 INFO L87 Difference]: Start difference. First operand 112 states and 129 transitions. Second operand has 32 states, 31 states have (on average 2.5161290322580645) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:32:18,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:32:18,613 INFO L93 Difference]: Finished difference Result 140 states and 159 transitions. [2024-10-13 10:32:18,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-10-13 10:32:18,613 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.5161290322580645) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 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 38 [2024-10-13 10:32:18,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:32:18,614 INFO L225 Difference]: With dead ends: 140 [2024-10-13 10:32:18,614 INFO L226 Difference]: Without dead ends: 140 [2024-10-13 10:32:18,614 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 54 SyntacticMatches, 5 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=229, Invalid=1577, Unknown=0, NotChecked=0, Total=1806 [2024-10-13 10:32:18,614 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 82 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-13 10:32:18,615 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 389 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 523 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-13 10:32:18,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2024-10-13 10:32:18,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 124. [2024-10-13 10:32:18,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.1626016260162602) internal successors, (143), 123 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:32:18,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 143 transitions. [2024-10-13 10:32:18,617 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 143 transitions. Word has length 38 [2024-10-13 10:32:18,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:32:18,617 INFO L471 AbstractCegarLoop]: Abstraction has 124 states and 143 transitions. [2024-10-13 10:32:18,617 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.5161290322580645) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:32:18,617 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 143 transitions. [2024-10-13 10:32:18,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-10-13 10:32:18,618 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:32:18,618 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:32:18,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-10-13 10:32:18,818 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,SelfDestructingSolverStorable31 [2024-10-13 10:32:18,819 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-10-13 10:32:18,819 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:32:18,819 INFO L85 PathProgramCache]: Analyzing trace with hash 2073792920, now seen corresponding path program 8 times [2024-10-13 10:32:18,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:32:18,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207140440] [2024-10-13 10:32:18,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:32:18,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:32:18,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:32:19,110 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 14 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:32:19,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:32:19,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207140440] [2024-10-13 10:32:19,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207140440] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 10:32:19,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787851651] [2024-10-13 10:32:19,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 10:32:19,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:32:19,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 10:32:19,112 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 10:32:19,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-13 10:32:19,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 10:32:19,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 10:32:19,193 INFO L255 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 78 conjuncts are in the unsatisfiable core [2024-10-13 10:32:19,194 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 10:32:19,388 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-13 10:32:19,414 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-10-13 10:32:19,790 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-13 10:32:19,792 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 10:32:19,792 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2024-10-13 10:32:19,793 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 14 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:32:19,794 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 10:32:19,967 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-10-13 10:32:19,969 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-10-13 10:32:20,310 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 14 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:32:20,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787851651] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 10:32:20,313 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 10:32:20,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22, 20] total 50 [2024-10-13 10:32:20,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604534805] [2024-10-13 10:32:20,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 10:32:20,314 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-10-13 10:32:20,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:32:20,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-10-13 10:32:20,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=2260, Unknown=0, NotChecked=0, Total=2450 [2024-10-13 10:32:20,315 INFO L87 Difference]: Start difference. First operand 124 states and 143 transitions. Second operand has 50 states, 50 states have (on average 1.96) internal successors, (98), 50 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:32:21,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:32:21,251 INFO L93 Difference]: Finished difference Result 241 states and 270 transitions. [2024-10-13 10:32:21,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-10-13 10:32:21,251 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.96) internal successors, (98), 50 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2024-10-13 10:32:21,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:32:21,252 INFO L225 Difference]: With dead ends: 241 [2024-10-13 10:32:21,252 INFO L226 Difference]: Without dead ends: 148 [2024-10-13 10:32:21,253 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1439 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=463, Invalid=5543, Unknown=0, NotChecked=0, Total=6006 [2024-10-13 10:32:21,253 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 79 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 843 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 843 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-13 10:32:21,253 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 426 Invalid, 852 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 843 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-13 10:32:21,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2024-10-13 10:32:21,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 130. [2024-10-13 10:32:21,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 1.1550387596899225) internal successors, (149), 129 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:32:21,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 149 transitions. [2024-10-13 10:32:21,255 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 149 transitions. Word has length 42 [2024-10-13 10:32:21,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:32:21,256 INFO L471 AbstractCegarLoop]: Abstraction has 130 states and 149 transitions. [2024-10-13 10:32:21,256 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.96) internal successors, (98), 50 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:32:21,256 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 149 transitions. [2024-10-13 10:32:21,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-10-13 10:32:21,256 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:32:21,256 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:32:21,269 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-10-13 10:32:21,456 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:32:21,457 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-10-13 10:32:21,457 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:32:21,457 INFO L85 PathProgramCache]: Analyzing trace with hash 843300019, now seen corresponding path program 9 times [2024-10-13 10:32:21,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:32:21,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037393871] [2024-10-13 10:32:21,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:32:21,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:32:21,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:32:21,725 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 9 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:32:21,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:32:21,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037393871] [2024-10-13 10:32:21,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037393871] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 10:32:21,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990464853] [2024-10-13 10:32:21,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-13 10:32:21,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:32:21,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 10:32:21,727 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 10:32:21,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-10-13 10:32:21,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-10-13 10:32:21,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 10:32:21,809 INFO L255 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-10-13 10:32:21,810 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 10:32:21,814 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-10-13 10:32:22,017 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 16 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:32:22,017 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 10:32:22,355 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 16 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:32:22,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990464853] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 10:32:22,355 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 10:32:22,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 47 [2024-10-13 10:32:22,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62915232] [2024-10-13 10:32:22,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 10:32:22,356 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-10-13 10:32:22,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:32:22,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-10-13 10:32:22,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=1979, Unknown=0, NotChecked=0, Total=2256 [2024-10-13 10:32:22,357 INFO L87 Difference]: Start difference. First operand 130 states and 149 transitions. Second operand has 48 states, 47 states have (on average 2.6382978723404253) internal successors, (124), 48 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:32:22,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:32:22,788 INFO L93 Difference]: Finished difference Result 162 states and 183 transitions. [2024-10-13 10:32:22,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-10-13 10:32:22,789 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 2.6382978723404253) internal successors, (124), 48 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2024-10-13 10:32:22,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:32:22,789 INFO L225 Difference]: With dead ends: 162 [2024-10-13 10:32:22,789 INFO L226 Difference]: Without dead ends: 162 [2024-10-13 10:32:22,790 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1003 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=473, Invalid=3187, Unknown=0, NotChecked=0, Total=3660 [2024-10-13 10:32:22,790 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 57 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 696 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 534 SdHoareTripleChecker+Invalid, 696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-13 10:32:22,790 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 534 Invalid, 696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 696 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-13 10:32:22,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2024-10-13 10:32:22,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 142. [2024-10-13 10:32:22,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.1560283687943262) internal successors, (163), 141 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:32:22,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 163 transitions. [2024-10-13 10:32:22,795 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 163 transitions. Word has length 44 [2024-10-13 10:32:22,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:32:22,795 INFO L471 AbstractCegarLoop]: Abstraction has 142 states and 163 transitions. [2024-10-13 10:32:22,795 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 2.6382978723404253) internal successors, (124), 48 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:32:22,795 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 163 transitions. [2024-10-13 10:32:22,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-10-13 10:32:22,795 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:32:22,796 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:32:22,808 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-10-13 10:32:22,996 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:32:22,996 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-10-13 10:32:22,996 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:32:22,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1114703305, now seen corresponding path program 10 times [2024-10-13 10:32:22,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:32:22,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399374059] [2024-10-13 10:32:22,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:32:22,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:32:23,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:32:23,325 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 17 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:32:23,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:32:23,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399374059] [2024-10-13 10:32:23,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399374059] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 10:32:23,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710893008] [2024-10-13 10:32:23,325 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-13 10:32:23,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:32:23,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 10:32:23,327 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 10:32:23,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-10-13 10:32:23,406 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-13 10:32:23,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 10:32:23,408 INFO L255 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 96 conjuncts are in the unsatisfiable core [2024-10-13 10:32:23,409 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 10:32:23,567 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-13 10:32:23,588 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-10-13 10:32:31,716 INFO L349 Elim1Store]: treesize reduction 25, result has 49.0 percent of original size [2024-10-13 10:32:31,716 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 68 treesize of output 50 [2024-10-13 10:32:31,719 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 33 proven. 35 refuted. 29 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:32:31,719 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 10:32:32,706 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 89 treesize of output 77 [2024-10-13 10:32:32,710 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 10:32:32,710 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 89 treesize of output 67 [2024-10-13 10:32:33,240 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-10-13 10:32:33,241 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 72 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:32:33,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710893008] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 10:32:33,242 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 10:32:33,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 32, 29] total 74 [2024-10-13 10:32:33,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589678745] [2024-10-13 10:32:33,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 10:32:33,242 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2024-10-13 10:32:33,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:32:33,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2024-10-13 10:32:33,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=492, Invalid=4883, Unknown=27, NotChecked=0, Total=5402 [2024-10-13 10:32:33,243 INFO L87 Difference]: Start difference. First operand 142 states and 163 transitions. Second operand has 74 states, 74 states have (on average 1.7567567567567568) internal successors, (130), 74 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:32:36,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:32:36,083 INFO L93 Difference]: Finished difference Result 277 states and 310 transitions. [2024-10-13 10:32:36,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2024-10-13 10:32:36,083 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 1.7567567567567568) internal successors, (130), 74 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2024-10-13 10:32:36,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:32:36,084 INFO L225 Difference]: With dead ends: 277 [2024-10-13 10:32:36,084 INFO L226 Difference]: Without dead ends: 168 [2024-10-13 10:32:36,085 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 3678 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=1210, Invalid=12569, Unknown=27, NotChecked=0, Total=13806 [2024-10-13 10:32:36,085 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 135 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 1370 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 1375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1370 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-10-13 10:32:36,085 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 280 Invalid, 1375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1370 Invalid, 1 Unknown, 0 Unchecked, 1.1s Time] [2024-10-13 10:32:36,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2024-10-13 10:32:36,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 148. [2024-10-13 10:32:36,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.1496598639455782) internal successors, (169), 147 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:32:36,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 169 transitions. [2024-10-13 10:32:36,088 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 169 transitions. Word has length 48 [2024-10-13 10:32:36,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:32:36,088 INFO L471 AbstractCegarLoop]: Abstraction has 148 states and 169 transitions. [2024-10-13 10:32:36,088 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 1.7567567567567568) internal successors, (130), 74 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:32:36,088 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 169 transitions. [2024-10-13 10:32:36,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-10-13 10:32:36,089 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:32:36,089 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:32:36,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-10-13 10:32:36,292 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,SelfDestructingSolverStorable34 [2024-10-13 10:32:36,292 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-10-13 10:32:36,293 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:32:36,293 INFO L85 PathProgramCache]: Analyzing trace with hash 376644882, now seen corresponding path program 11 times [2024-10-13 10:32:36,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:32:36,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948097722] [2024-10-13 10:32:36,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:32:36,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:32:36,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:32:36,625 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 16 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:32:36,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:32:36,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948097722] [2024-10-13 10:32:36,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948097722] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 10:32:36,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132352839] [2024-10-13 10:32:36,625 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-13 10:32:36,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:32:36,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 10:32:36,627 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 10:32:36,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-10-13 10:32:36,710 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-10-13 10:32:36,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 10:32:36,711 INFO L255 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 74 conjuncts are in the unsatisfiable core [2024-10-13 10:32:36,712 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 10:32:36,716 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-13 10:32:36,923 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 25 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:32:36,923 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 10:32:37,330 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 25 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:32:37,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132352839] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 10:32:37,330 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 10:32:37,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 46 [2024-10-13 10:32:37,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755878444] [2024-10-13 10:32:37,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 10:32:37,331 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-10-13 10:32:37,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:32:37,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-10-13 10:32:37,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=1880, Unknown=0, NotChecked=0, Total=2162 [2024-10-13 10:32:37,331 INFO L87 Difference]: Start difference. First operand 148 states and 169 transitions. Second operand has 47 states, 46 states have (on average 2.608695652173913) internal successors, (120), 47 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:32:37,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:32:37,846 INFO L93 Difference]: Finished difference Result 184 states and 207 transitions. [2024-10-13 10:32:37,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-10-13 10:32:37,847 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 2.608695652173913) internal successors, (120), 47 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) Word has length 50 [2024-10-13 10:32:37,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:32:37,847 INFO L225 Difference]: With dead ends: 184 [2024-10-13 10:32:37,847 INFO L226 Difference]: Without dead ends: 184 [2024-10-13 10:32:37,848 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1089 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=455, Invalid=3327, Unknown=0, NotChecked=0, Total=3782 [2024-10-13 10:32:37,848 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 154 mSDsluCounter, 593 mSDsCounter, 0 mSdLazyCounter, 782 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 627 SdHoareTripleChecker+Invalid, 782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-13 10:32:37,848 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 627 Invalid, 782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 782 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-13 10:32:37,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2024-10-13 10:32:37,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 160. [2024-10-13 10:32:37,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 1.150943396226415) internal successors, (183), 159 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:32:37,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 183 transitions. [2024-10-13 10:32:37,852 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 183 transitions. Word has length 50 [2024-10-13 10:32:37,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:32:37,852 INFO L471 AbstractCegarLoop]: Abstraction has 160 states and 183 transitions. [2024-10-13 10:32:37,852 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 2.608695652173913) internal successors, (120), 47 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:32:37,852 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 183 transitions. [2024-10-13 10:32:37,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-10-13 10:32:37,852 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:32:37,852 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:32:37,864 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-10-13 10:32:38,053 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:32:38,053 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-10-13 10:32:38,053 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:32:38,053 INFO L85 PathProgramCache]: Analyzing trace with hash -1325065450, now seen corresponding path program 12 times [2024-10-13 10:32:38,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:32:38,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835550041] [2024-10-13 10:32:38,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:32:38,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:32:38,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:32:38,423 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 20 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:32:38,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:32:38,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835550041] [2024-10-13 10:32:38,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835550041] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 10:32:38,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129667547] [2024-10-13 10:32:38,424 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-13 10:32:38,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:32:38,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 10:32:38,425 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 10:32:38,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-10-13 10:32:38,596 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2024-10-13 10:32:38,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 10:32:38,598 INFO L255 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 98 conjuncts are in the unsatisfiable core [2024-10-13 10:32:38,600 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 10:32:38,812 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-13 10:32:38,838 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-10-13 10:32:38,953 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 20 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:32:38,953 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 10:32:39,023 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-10-13 10:32:39,025 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-10-13 10:32:39,229 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 20 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:32:39,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129667547] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 10:32:39,229 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 10:32:39,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 25, 22] total 49 [2024-10-13 10:32:39,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446811779] [2024-10-13 10:32:39,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 10:32:39,229 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-10-13 10:32:39,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:32:39,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-10-13 10:32:39,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=2187, Unknown=0, NotChecked=0, Total=2352 [2024-10-13 10:32:39,230 INFO L87 Difference]: Start difference. First operand 160 states and 183 transitions. Second operand has 49 states, 49 states have (on average 2.0408163265306123) internal successors, (100), 49 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:32:40,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:32:40,284 INFO L93 Difference]: Finished difference Result 313 states and 350 transitions. [2024-10-13 10:32:40,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-10-13 10:32:40,285 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.0408163265306123) internal successors, (100), 49 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2024-10-13 10:32:40,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:32:40,285 INFO L225 Difference]: With dead ends: 313 [2024-10-13 10:32:40,285 INFO L226 Difference]: Without dead ends: 188 [2024-10-13 10:32:40,286 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1592 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=482, Invalid=6658, Unknown=0, NotChecked=0, Total=7140 [2024-10-13 10:32:40,286 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 139 mSDsluCounter, 833 mSDsCounter, 0 mSdLazyCounter, 1373 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 864 SdHoareTripleChecker+Invalid, 1386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-13 10:32:40,286 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 864 Invalid, 1386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1373 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-13 10:32:40,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2024-10-13 10:32:40,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 166. [2024-10-13 10:32:40,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 1.1454545454545455) internal successors, (189), 165 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:32:40,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 189 transitions. [2024-10-13 10:32:40,288 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 189 transitions. Word has length 54 [2024-10-13 10:32:40,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:32:40,289 INFO L471 AbstractCegarLoop]: Abstraction has 166 states and 189 transitions. [2024-10-13 10:32:40,289 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.0408163265306123) internal successors, (100), 49 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:32:40,289 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 189 transitions. [2024-10-13 10:32:40,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-10-13 10:32:40,289 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:32:40,289 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:32:40,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-10-13 10:32:40,493 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:32:40,493 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-10-13 10:32:40,493 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:32:40,494 INFO L85 PathProgramCache]: Analyzing trace with hash -711559759, now seen corresponding path program 13 times [2024-10-13 10:32:40,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:32:40,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524067497] [2024-10-13 10:32:40,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:32:40,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:32:40,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:32:40,971 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 25 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:32:40,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:32:40,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524067497] [2024-10-13 10:32:40,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524067497] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 10:32:40,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691001215] [2024-10-13 10:32:40,971 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-13 10:32:40,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:32:40,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 10:32:40,972 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 10:32:40,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-10-13 10:32:41,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:32:41,059 INFO L255 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 78 conjuncts are in the unsatisfiable core [2024-10-13 10:32:41,061 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 10:32:41,270 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 36 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:32:41,271 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 10:32:41,536 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-10-13 10:32:41,632 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 36 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:32:41,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691001215] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 10:32:41,632 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 10:32:41,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 43 [2024-10-13 10:32:41,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408155018] [2024-10-13 10:32:41,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 10:32:41,632 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-10-13 10:32:41,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:32:41,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-10-13 10:32:41,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=1679, Unknown=0, NotChecked=0, Total=1892 [2024-10-13 10:32:41,633 INFO L87 Difference]: Start difference. First operand 166 states and 189 transitions. Second operand has 44 states, 43 states have (on average 2.6511627906976742) internal successors, (114), 44 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:32:42,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:32:42,120 INFO L93 Difference]: Finished difference Result 206 states and 231 transitions. [2024-10-13 10:32:42,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-10-13 10:32:42,120 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 2.6511627906976742) internal successors, (114), 44 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) Word has length 56 [2024-10-13 10:32:42,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:32:42,121 INFO L225 Difference]: With dead ends: 206 [2024-10-13 10:32:42,121 INFO L226 Difference]: Without dead ends: 206 [2024-10-13 10:32:42,121 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 81 SyntacticMatches, 8 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1227 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=412, Invalid=3248, Unknown=0, NotChecked=0, Total=3660 [2024-10-13 10:32:42,121 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 144 mSDsluCounter, 535 mSDsCounter, 0 mSdLazyCounter, 823 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 823 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-13 10:32:42,122 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 572 Invalid, 823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 823 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-13 10:32:42,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2024-10-13 10:32:42,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 178. [2024-10-13 10:32:42,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 1.1468926553672316) internal successors, (203), 177 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:32:42,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 203 transitions. [2024-10-13 10:32:42,124 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 203 transitions. Word has length 56 [2024-10-13 10:32:42,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:32:42,125 INFO L471 AbstractCegarLoop]: Abstraction has 178 states and 203 transitions. [2024-10-13 10:32:42,125 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 2.6511627906976742) internal successors, (114), 44 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:32:42,125 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 203 transitions. [2024-10-13 10:32:42,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-10-13 10:32:42,125 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:32:42,125 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:32:42,139 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-10-13 10:32:42,326 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:32:42,326 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-10-13 10:32:42,326 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:32:42,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1765735371, now seen corresponding path program 14 times [2024-10-13 10:32:42,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:32:42,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16282545] [2024-10-13 10:32:42,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:32:42,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:32:42,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:32:42,778 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 23 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:32:42,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:32:42,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16282545] [2024-10-13 10:32:42,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16282545] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 10:32:42,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514126509] [2024-10-13 10:32:42,779 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 10:32:42,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:32:42,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 10:32:42,780 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 10:32:42,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-10-13 10:32:42,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 10:32:42,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 10:32:42,894 INFO L255 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 108 conjuncts are in the unsatisfiable core [2024-10-13 10:32:42,896 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 10:32:43,145 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-13 10:32:43,173 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-10-13 10:32:43,291 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 23 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:32:43,291 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 10:32:43,370 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 15 treesize of output 13 [2024-10-13 10:32:43,371 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-10-13 10:32:43,606 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 23 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:32:43,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514126509] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 10:32:43,606 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 10:32:43,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 27, 24] total 53 [2024-10-13 10:32:43,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257089802] [2024-10-13 10:32:43,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 10:32:43,607 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2024-10-13 10:32:43,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:32:43,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2024-10-13 10:32:43,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=2578, Unknown=0, NotChecked=0, Total=2756 [2024-10-13 10:32:43,608 INFO L87 Difference]: Start difference. First operand 178 states and 203 transitions. Second operand has 53 states, 53 states have (on average 2.0754716981132075) internal successors, (110), 53 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:32:44,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:32:44,771 INFO L93 Difference]: Finished difference Result 349 states and 390 transitions. [2024-10-13 10:32:44,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2024-10-13 10:32:44,772 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.0754716981132075) internal successors, (110), 53 states have internal predecessors, (110), 0 states have call successors, (0), 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 60 [2024-10-13 10:32:44,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:32:44,772 INFO L225 Difference]: With dead ends: 349 [2024-10-13 10:32:44,773 INFO L226 Difference]: Without dead ends: 208 [2024-10-13 10:32:44,773 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1920 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=531, Invalid=8025, Unknown=0, NotChecked=0, Total=8556 [2024-10-13 10:32:44,774 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 160 mSDsluCounter, 876 mSDsCounter, 0 mSdLazyCounter, 1552 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 911 SdHoareTripleChecker+Invalid, 1567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-13 10:32:44,774 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 911 Invalid, 1567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1552 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-13 10:32:44,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2024-10-13 10:32:44,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 184. [2024-10-13 10:32:44,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 1.1420765027322404) internal successors, (209), 183 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:32:44,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 209 transitions. [2024-10-13 10:32:44,776 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 209 transitions. Word has length 60 [2024-10-13 10:32:44,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:32:44,776 INFO L471 AbstractCegarLoop]: Abstraction has 184 states and 209 transitions. [2024-10-13 10:32:44,777 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.0754716981132075) internal successors, (110), 53 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:32:44,777 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 209 transitions. [2024-10-13 10:32:44,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-10-13 10:32:44,777 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:32:44,777 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:32:44,789 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-10-13 10:32:44,977 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,SelfDestructingSolverStorable38 [2024-10-13 10:32:44,978 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-10-13 10:32:44,978 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:32:44,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1120714384, now seen corresponding path program 15 times [2024-10-13 10:32:44,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:32:44,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799585841] [2024-10-13 10:32:44,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:32:44,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:32:44,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:32:45,524 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 36 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:32:45,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:32:45,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799585841] [2024-10-13 10:32:45,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799585841] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 10:32:45,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214233379] [2024-10-13 10:32:45,525 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-13 10:32:45,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:32:45,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 10:32:45,527 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 10:32:45,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-10-13 10:32:45,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2024-10-13 10:32:45,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 10:32:45,649 INFO L255 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 74 conjuncts are in the unsatisfiable core [2024-10-13 10:32:45,650 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 10:32:45,653 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-10-13 10:32:46,006 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 49 proven. 143 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:32:46,006 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 10:32:46,638 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 49 proven. 143 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:32:46,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214233379] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 10:32:46,638 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 10:32:46,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 65 [2024-10-13 10:32:46,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410921864] [2024-10-13 10:32:46,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 10:32:46,638 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2024-10-13 10:32:46,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:32:46,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2024-10-13 10:32:46,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=544, Invalid=3746, Unknown=0, NotChecked=0, Total=4290 [2024-10-13 10:32:46,639 INFO L87 Difference]: Start difference. First operand 184 states and 209 transitions. Second operand has 66 states, 65 states have (on average 2.7384615384615385) internal successors, (178), 66 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:32:47,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:32:47,310 INFO L93 Difference]: Finished difference Result 228 states and 255 transitions. [2024-10-13 10:32:47,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-10-13 10:32:47,310 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 65 states have (on average 2.7384615384615385) internal successors, (178), 66 states have internal predecessors, (178), 0 states have call successors, (0), 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 62 [2024-10-13 10:32:47,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:32:47,311 INFO L225 Difference]: With dead ends: 228 [2024-10-13 10:32:47,311 INFO L226 Difference]: Without dead ends: 228 [2024-10-13 10:32:47,311 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2146 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=893, Invalid=6247, Unknown=0, NotChecked=0, Total=7140 [2024-10-13 10:32:47,311 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 151 mSDsluCounter, 779 mSDsCounter, 0 mSdLazyCounter, 996 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 820 SdHoareTripleChecker+Invalid, 996 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 996 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-13 10:32:47,312 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 820 Invalid, 996 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 996 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-13 10:32:47,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2024-10-13 10:32:47,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 196. [2024-10-13 10:32:47,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 1.1435897435897435) internal successors, (223), 195 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:32:47,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 223 transitions. [2024-10-13 10:32:47,315 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 223 transitions. Word has length 62 [2024-10-13 10:32:47,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:32:47,315 INFO L471 AbstractCegarLoop]: Abstraction has 196 states and 223 transitions. [2024-10-13 10:32:47,315 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 65 states have (on average 2.7384615384615385) internal successors, (178), 66 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:32:47,315 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 223 transitions. [2024-10-13 10:32:47,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-10-13 10:32:47,316 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:32:47,316 INFO L215 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:32:47,329 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-10-13 10:32:47,516 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-10-13 10:32:47,516 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-10-13 10:32:47,516 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:32:47,517 INFO L85 PathProgramCache]: Analyzing trace with hash 2077869460, now seen corresponding path program 16 times [2024-10-13 10:32:47,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:32:47,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240214165] [2024-10-13 10:32:47,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:32:47,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:32:47,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:32:48,031 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 26 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:32:48,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:32:48,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240214165] [2024-10-13 10:32:48,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240214165] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 10:32:48,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259392227] [2024-10-13 10:32:48,031 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-13 10:32:48,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:32:48,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 10:32:48,033 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 10:32:48,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-10-13 10:32:48,138 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-13 10:32:48,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 10:32:48,146 INFO L255 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 132 conjuncts are in the unsatisfiable core [2024-10-13 10:32:48,147 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 10:32:48,420 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 11 treesize of output 7 [2024-10-13 10:32:48,445 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-10-13 10:33:15,966 INFO L349 Elim1Store]: treesize reduction 37, result has 49.3 percent of original size [2024-10-13 10:33:15,966 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 98 treesize of output 74 [2024-10-13 10:33:15,967 WARN L672 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2024-10-13 10:33:15,984 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 51 proven. 80 refuted. 95 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:33:15,984 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 10:33:18,490 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 134 treesize of output 116 [2024-10-13 10:33:18,495 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 10:33:18,496 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 134 treesize of output 100 [2024-10-13 10:33:19,649 WARN L672 sPolynomialRelations]: Constructing 512(two to the power of 9 dual juncts. [2024-10-13 10:33:19,657 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 162 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:33:19,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259392227] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 10:33:19,657 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 10:33:19,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 44, 41] total 104 [2024-10-13 10:33:19,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341651381] [2024-10-13 10:33:19,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 10:33:19,657 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2024-10-13 10:33:19,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:33:19,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2024-10-13 10:33:19,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=927, Invalid=9703, Unknown=82, NotChecked=0, Total=10712 [2024-10-13 10:33:19,659 INFO L87 Difference]: Start difference. First operand 196 states and 223 transitions. Second operand has 104 states, 104 states have (on average 1.7692307692307692) internal successors, (184), 104 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:33:25,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:33:25,814 INFO L93 Difference]: Finished difference Result 385 states and 430 transitions. [2024-10-13 10:33:25,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2024-10-13 10:33:25,815 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 1.7692307692307692) internal successors, (184), 104 states have internal predecessors, (184), 0 states have call successors, (0), 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 66 [2024-10-13 10:33:25,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:33:25,816 INFO L225 Difference]: With dead ends: 385 [2024-10-13 10:33:25,816 INFO L226 Difference]: Without dead ends: 228 [2024-10-13 10:33:25,817 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 7239 ImplicationChecksByTransitivity, 35.1s TimeCoverageRelationStatistics Valid=2239, Invalid=25069, Unknown=82, NotChecked=0, Total=27390 [2024-10-13 10:33:25,817 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 257 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 2340 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 2348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 2340 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-10-13 10:33:25,817 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 414 Invalid, 2348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 2340 Invalid, 1 Unknown, 0 Unchecked, 1.7s Time] [2024-10-13 10:33:25,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2024-10-13 10:33:25,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 202. [2024-10-13 10:33:25,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 1.1393034825870647) internal successors, (229), 201 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:33:25,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 229 transitions. [2024-10-13 10:33:25,820 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 229 transitions. Word has length 66 [2024-10-13 10:33:25,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:33:25,820 INFO L471 AbstractCegarLoop]: Abstraction has 202 states and 229 transitions. [2024-10-13 10:33:25,820 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 1.7692307692307692) internal successors, (184), 104 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:33:25,820 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 229 transitions. [2024-10-13 10:33:25,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-10-13 10:33:25,820 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:33:25,821 INFO L215 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:33:25,834 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-10-13 10:33:26,021 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:33:26,022 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-10-13 10:33:26,022 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:33:26,022 INFO L85 PathProgramCache]: Analyzing trace with hash -930541649, now seen corresponding path program 17 times [2024-10-13 10:33:26,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:33:26,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217109572] [2024-10-13 10:33:26,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:33:26,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:33:26,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat