./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_cstrlcpy-alloca-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version fca748b1 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_cstrlcpy-alloca-1.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 a775ba6b744ab5ffb556747687a592ac2a696b9fe34bb3e21dc1471ba5c99e1a --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dd.update-z3-fca748b-m [2024-11-20 14:27:32,923 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-20 14:27:32,985 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-20 14:27:32,989 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-20 14:27:32,990 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-20 14:27:33,016 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-20 14:27:33,017 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-20 14:27:33,017 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-20 14:27:33,017 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-20 14:27:33,021 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-20 14:27:33,021 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-20 14:27:33,021 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-20 14:27:33,022 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-20 14:27:33,022 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-20 14:27:33,022 INFO L153 SettingsManager]: * Use SBE=true [2024-11-20 14:27:33,023 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-20 14:27:33,023 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-20 14:27:33,023 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-20 14:27:33,023 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-20 14:27:33,023 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-20 14:27:33,024 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-20 14:27:33,027 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-20 14:27:33,027 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-20 14:27:33,027 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-20 14:27:33,028 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-20 14:27:33,028 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-20 14:27:33,028 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-20 14:27:33,028 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-20 14:27:33,028 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-20 14:27:33,029 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-20 14:27:33,029 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-20 14:27:33,030 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-20 14:27:33,030 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-20 14:27:33,030 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-20 14:27:33,030 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-20 14:27:33,030 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-20 14:27:33,031 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-20 14:27:33,031 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-20 14:27:33,031 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-20 14:27:33,031 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-20 14:27:33,031 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-20 14:27:33,032 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-20 14:27:33,032 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a775ba6b744ab5ffb556747687a592ac2a696b9fe34bb3e21dc1471ba5c99e1a [2024-11-20 14:27:33,280 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-20 14:27:33,303 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-20 14:27:33,307 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-20 14:27:33,308 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-20 14:27:33,309 INFO L274 PluginConnector]: CDTParser initialized [2024-11-20 14:27:33,310 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/openbsd_cstrlcpy-alloca-1.i [2024-11-20 14:27:34,732 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-20 14:27:34,974 INFO L384 CDTParser]: Found 1 translation units. [2024-11-20 14:27:34,975 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/openbsd_cstrlcpy-alloca-1.i [2024-11-20 14:27:34,989 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b749ccdb/b2833d1065c64ae8921063d4d3fcaf06/FLAG4352a0928 [2024-11-20 14:27:35,003 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b749ccdb/b2833d1065c64ae8921063d4d3fcaf06 [2024-11-20 14:27:35,005 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-20 14:27:35,007 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-20 14:27:35,009 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-20 14:27:35,010 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-20 14:27:35,016 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-20 14:27:35,016 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 02:27:35" (1/1) ... [2024-11-20 14:27:35,017 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e307e03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:27:35, skipping insertion in model container [2024-11-20 14:27:35,017 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 02:27:35" (1/1) ... [2024-11-20 14:27:35,077 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-20 14:27:35,384 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-20 14:27:35,385 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-20 14:27:35,389 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-20 14:27:35,398 INFO L200 MainTranslator]: Completed pre-run [2024-11-20 14:27:35,434 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-20 14:27:35,467 INFO L204 MainTranslator]: Completed translation [2024-11-20 14:27:35,468 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:27:35 WrapperNode [2024-11-20 14:27:35,468 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-20 14:27:35,469 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-20 14:27:35,469 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-20 14:27:35,469 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-20 14:27:35,478 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:27:35" (1/1) ... [2024-11-20 14:27:35,489 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:27:35" (1/1) ... [2024-11-20 14:27:35,510 INFO L138 Inliner]: procedures = 117, calls = 17, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 105 [2024-11-20 14:27:35,510 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-20 14:27:35,511 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-20 14:27:35,511 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-20 14:27:35,511 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-20 14:27:35,519 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:27:35" (1/1) ... [2024-11-20 14:27:35,519 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:27:35" (1/1) ... [2024-11-20 14:27:35,523 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:27:35" (1/1) ... [2024-11-20 14:27:35,536 INFO L175 MemorySlicer]: Split 8 memory accesses to 2 slices as follows [4, 4]. 50 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0, 0]. The 6 writes are split as follows [4, 2]. [2024-11-20 14:27:35,536 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:27:35" (1/1) ... [2024-11-20 14:27:35,536 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:27:35" (1/1) ... [2024-11-20 14:27:35,542 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:27:35" (1/1) ... [2024-11-20 14:27:35,545 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:27:35" (1/1) ... [2024-11-20 14:27:35,547 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:27:35" (1/1) ... [2024-11-20 14:27:35,548 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:27:35" (1/1) ... [2024-11-20 14:27:35,550 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-20 14:27:35,551 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-20 14:27:35,551 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-20 14:27:35,552 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-20 14:27:35,552 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:27:35" (1/1) ... [2024-11-20 14:27:35,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-20 14:27:35,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:27:35,590 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) [2024-11-20 14:27:35,593 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 [2024-11-20 14:27:35,643 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-20 14:27:35,644 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-20 14:27:35,645 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-20 14:27:35,645 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-20 14:27:35,645 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-20 14:27:35,646 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-20 14:27:35,646 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-20 14:27:35,646 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-20 14:27:35,770 INFO L238 CfgBuilder]: Building ICFG [2024-11-20 14:27:35,772 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-20 14:27:36,070 INFO L? ?]: Removed 67 outVars from TransFormulas that were not future-live. [2024-11-20 14:27:36,070 INFO L287 CfgBuilder]: Performing block encoding [2024-11-20 14:27:36,085 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-20 14:27:36,087 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-20 14:27:36,088 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 02:27:36 BoogieIcfgContainer [2024-11-20 14:27:36,088 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-20 14:27:36,091 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-20 14:27:36,092 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-20 14:27:36,095 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-20 14:27:36,096 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 02:27:35" (1/3) ... [2024-11-20 14:27:36,097 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c4616a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 02:27:36, skipping insertion in model container [2024-11-20 14:27:36,097 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:27:35" (2/3) ... [2024-11-20 14:27:36,098 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c4616a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 02:27:36, skipping insertion in model container [2024-11-20 14:27:36,098 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 02:27:36" (3/3) ... [2024-11-20 14:27:36,099 INFO L112 eAbstractionObserver]: Analyzing ICFG openbsd_cstrlcpy-alloca-1.i [2024-11-20 14:27:36,118 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-20 14:27:36,118 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 17 error locations. [2024-11-20 14:27:36,167 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-20 14:27:36,175 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;@74f0e36c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-20 14:27:36,176 INFO L334 AbstractCegarLoop]: Starting to check reachability of 17 error locations. [2024-11-20 14:27:36,180 INFO L276 IsEmpty]: Start isEmpty. Operand has 52 states, 34 states have (on average 1.911764705882353) internal successors, (65), 51 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:36,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-20 14:27:36,187 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:27:36,188 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:27:36,188 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-20 14:27:36,195 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:27:36,195 INFO L85 PathProgramCache]: Analyzing trace with hash 1805029096, now seen corresponding path program 1 times [2024-11-20 14:27:36,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:27:36,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74766105] [2024-11-20 14:27:36,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:27:36,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:27:36,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:27:36,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:27:36,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:27:36,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74766105] [2024-11-20 14:27:36,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74766105] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 14:27:36,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 14:27:36,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-20 14:27:36,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187545268] [2024-11-20 14:27:36,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 14:27:36,516 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 14:27:36,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:27:36,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 14:27:36,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-20 14:27:36,550 INFO L87 Difference]: Start difference. First operand has 52 states, 34 states have (on average 1.911764705882353) internal successors, (65), 51 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:36,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:27:36,597 INFO L93 Difference]: Finished difference Result 68 states and 80 transitions. [2024-11-20 14:27:36,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 14:27:36,600 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-20 14:27:36,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:27:36,606 INFO L225 Difference]: With dead ends: 68 [2024-11-20 14:27:36,606 INFO L226 Difference]: Without dead ends: 66 [2024-11-20 14:27:36,608 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 [2024-11-20 14:27:36,611 INFO L432 NwaCegarLoop]: 57 mSDtfsCounter, 15 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-20 14:27:36,612 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 123 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-20 14:27:36,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-11-20 14:27:36,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 53. [2024-11-20 14:27:36,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 36 states have (on average 1.75) internal successors, (63), 52 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:36,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 63 transitions. [2024-11-20 14:27:36,644 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 63 transitions. Word has length 7 [2024-11-20 14:27:36,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:27:36,645 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 63 transitions. [2024-11-20 14:27:36,645 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:36,645 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 63 transitions. [2024-11-20 14:27:36,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-20 14:27:36,646 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:27:36,647 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:27:36,647 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-20 14:27:36,647 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-20 14:27:36,648 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:27:36,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876138, now seen corresponding path program 1 times [2024-11-20 14:27:36,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:27:36,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692130171] [2024-11-20 14:27:36,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:27:36,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:27:36,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:27:36,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:27:36,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:27:36,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692130171] [2024-11-20 14:27:36,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692130171] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 14:27:36,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 14:27:36,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-20 14:27:36,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95423743] [2024-11-20 14:27:36,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 14:27:36,789 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 14:27:36,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:27:36,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 14:27:36,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 14:27:36,790 INFO L87 Difference]: Start difference. First operand 53 states and 63 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:36,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:27:36,848 INFO L93 Difference]: Finished difference Result 51 states and 61 transitions. [2024-11-20 14:27:36,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 14:27:36,852 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-20 14:27:36,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:27:36,853 INFO L225 Difference]: With dead ends: 51 [2024-11-20 14:27:36,854 INFO L226 Difference]: Without dead ends: 51 [2024-11-20 14:27:36,854 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 [2024-11-20 14:27:36,855 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 17 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-20 14:27:36,856 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 71 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-20 14:27:36,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-11-20 14:27:36,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2024-11-20 14:27:36,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 36 states have (on average 1.6944444444444444) internal successors, (61), 50 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:36,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2024-11-20 14:27:36,861 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 7 [2024-11-20 14:27:36,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:27:36,862 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2024-11-20 14:27:36,862 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:36,862 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2024-11-20 14:27:36,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-20 14:27:36,863 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:27:36,863 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:27:36,863 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-20 14:27:36,863 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-20 14:27:36,864 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:27:36,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876139, now seen corresponding path program 1 times [2024-11-20 14:27:36,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:27:36,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528119424] [2024-11-20 14:27:36,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:27:36,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:27:36,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:27:37,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:27:37,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:27:37,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528119424] [2024-11-20 14:27:37,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528119424] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 14:27:37,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 14:27:37,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-20 14:27:37,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453852096] [2024-11-20 14:27:37,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 14:27:37,176 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 14:27:37,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:27:37,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 14:27:37,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-20 14:27:37,177 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:37,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:27:37,294 INFO L93 Difference]: Finished difference Result 55 states and 66 transitions. [2024-11-20 14:27:37,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 14:27:37,294 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-20 14:27:37,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:27:37,295 INFO L225 Difference]: With dead ends: 55 [2024-11-20 14:27:37,295 INFO L226 Difference]: Without dead ends: 55 [2024-11-20 14:27:37,295 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-20 14:27:37,296 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 26 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-20 14:27:37,297 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 143 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-20 14:27:37,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-11-20 14:27:37,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2024-11-20 14:27:37,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 38 states have (on average 1.6842105263157894) internal successors, (64), 52 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:37,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 64 transitions. [2024-11-20 14:27:37,308 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 64 transitions. Word has length 7 [2024-11-20 14:27:37,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:27:37,308 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 64 transitions. [2024-11-20 14:27:37,308 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:37,309 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 64 transitions. [2024-11-20 14:27:37,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-20 14:27:37,309 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:27:37,310 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:27:37,310 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-20 14:27:37,310 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-20 14:27:37,311 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:27:37,311 INFO L85 PathProgramCache]: Analyzing trace with hash -533876908, now seen corresponding path program 1 times [2024-11-20 14:27:37,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:27:37,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196168920] [2024-11-20 14:27:37,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:27:37,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:27:37,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:27:37,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:27:37,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:27:37,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196168920] [2024-11-20 14:27:37,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196168920] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 14:27:37,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 14:27:37,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-20 14:27:37,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052739558] [2024-11-20 14:27:37,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 14:27:37,395 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 14:27:37,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:27:37,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 14:27:37,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-20 14:27:37,396 INFO L87 Difference]: Start difference. First operand 53 states and 64 transitions. Second operand has 4 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) [2024-11-20 14:27:37,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:27:37,455 INFO L93 Difference]: Finished difference Result 71 states and 85 transitions. [2024-11-20 14:27:37,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 14:27:37,456 INFO L78 Accepts]: Start accepts. Automaton has has 4 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 [2024-11-20 14:27:37,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:27:37,457 INFO L225 Difference]: With dead ends: 71 [2024-11-20 14:27:37,457 INFO L226 Difference]: Without dead ends: 71 [2024-11-20 14:27:37,457 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 [2024-11-20 14:27:37,459 INFO L432 NwaCegarLoop]: 52 mSDtfsCounter, 11 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-20 14:27:37,459 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 143 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-20 14:27:37,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-11-20 14:27:37,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 64. [2024-11-20 14:27:37,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 49 states have (on average 1.5918367346938775) internal successors, (78), 63 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) [2024-11-20 14:27:37,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 78 transitions. [2024-11-20 14:27:37,469 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 78 transitions. Word has length 9 [2024-11-20 14:27:37,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:27:37,470 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 78 transitions. [2024-11-20 14:27:37,470 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 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) [2024-11-20 14:27:37,470 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 78 transitions. [2024-11-20 14:27:37,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-20 14:27:37,471 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:27:37,471 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:27:37,471 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-20 14:27:37,472 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-20 14:27:37,472 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:27:37,473 INFO L85 PathProgramCache]: Analyzing trace with hash -476618606, now seen corresponding path program 1 times [2024-11-20 14:27:37,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:27:37,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442713862] [2024-11-20 14:27:37,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:27:37,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:27:37,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:27:37,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:27:37,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:27:37,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442713862] [2024-11-20 14:27:37,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442713862] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 14:27:37,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 14:27:37,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-20 14:27:37,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245281990] [2024-11-20 14:27:37,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 14:27:37,532 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 14:27:37,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:27:37,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 14:27:37,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 14:27:37,533 INFO L87 Difference]: Start difference. First operand 64 states and 78 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 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) [2024-11-20 14:27:37,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:27:37,563 INFO L93 Difference]: Finished difference Result 62 states and 76 transitions. [2024-11-20 14:27:37,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 14:27:37,563 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 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 [2024-11-20 14:27:37,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:27:37,564 INFO L225 Difference]: With dead ends: 62 [2024-11-20 14:27:37,564 INFO L226 Difference]: Without dead ends: 62 [2024-11-20 14:27:37,565 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 [2024-11-20 14:27:37,566 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 13 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-20 14:27:37,566 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 71 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-20 14:27:37,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-11-20 14:27:37,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2024-11-20 14:27:37,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 49 states have (on average 1.5510204081632653) internal successors, (76), 61 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) [2024-11-20 14:27:37,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 76 transitions. [2024-11-20 14:27:37,576 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 76 transitions. Word has length 9 [2024-11-20 14:27:37,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:27:37,577 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 76 transitions. [2024-11-20 14:27:37,578 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 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) [2024-11-20 14:27:37,578 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 76 transitions. [2024-11-20 14:27:37,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-20 14:27:37,578 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:27:37,578 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:27:37,579 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-20 14:27:37,579 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-20 14:27:37,579 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:27:37,580 INFO L85 PathProgramCache]: Analyzing trace with hash -476618605, now seen corresponding path program 1 times [2024-11-20 14:27:37,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:27:37,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851681842] [2024-11-20 14:27:37,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:27:37,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:27:37,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:27:37,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:27:37,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:27:37,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851681842] [2024-11-20 14:27:37,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851681842] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 14:27:37,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 14:27:37,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-20 14:27:37,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732734246] [2024-11-20 14:27:37,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 14:27:37,788 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-20 14:27:37,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:27:37,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-20 14:27:37,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-20 14:27:37,791 INFO L87 Difference]: Start difference. First operand 62 states and 76 transitions. Second operand has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:37,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:27:37,888 INFO L93 Difference]: Finished difference Result 66 states and 81 transitions. [2024-11-20 14:27:37,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-20 14:27:37,888 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-11-20 14:27:37,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:27:37,889 INFO L225 Difference]: With dead ends: 66 [2024-11-20 14:27:37,889 INFO L226 Difference]: Without dead ends: 66 [2024-11-20 14:27:37,890 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-11-20 14:27:37,890 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 39 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-20 14:27:37,891 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 130 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-20 14:27:37,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-11-20 14:27:37,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2024-11-20 14:27:37,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 51 states have (on average 1.5490196078431373) internal successors, (79), 63 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:37,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 79 transitions. [2024-11-20 14:27:37,895 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 79 transitions. Word has length 9 [2024-11-20 14:27:37,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:27:37,896 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 79 transitions. [2024-11-20 14:27:37,896 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:37,896 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 79 transitions. [2024-11-20 14:27:37,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-20 14:27:37,897 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:27:37,897 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:27:37,897 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-20 14:27:37,897 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-20 14:27:37,898 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:27:37,898 INFO L85 PathProgramCache]: Analyzing trace with hash 629683416, now seen corresponding path program 1 times [2024-11-20 14:27:37,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:27:37,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577167712] [2024-11-20 14:27:37,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:27:37,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:27:37,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:27:38,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:27:38,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:27:38,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577167712] [2024-11-20 14:27:38,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577167712] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 14:27:38,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 14:27:38,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-20 14:27:38,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481044991] [2024-11-20 14:27:38,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 14:27:38,027 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 14:27:38,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:27:38,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 14:27:38,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-20 14:27:38,028 INFO L87 Difference]: Start difference. First operand 64 states and 79 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) [2024-11-20 14:27:38,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:27:38,098 INFO L93 Difference]: Finished difference Result 70 states and 84 transitions. [2024-11-20 14:27:38,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 14:27:38,098 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 [2024-11-20 14:27:38,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:27:38,099 INFO L225 Difference]: With dead ends: 70 [2024-11-20 14:27:38,099 INFO L226 Difference]: Without dead ends: 70 [2024-11-20 14:27:38,100 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 [2024-11-20 14:27:38,101 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 8 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-20 14:27:38,103 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 125 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-20 14:27:38,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-11-20 14:27:38,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 66. [2024-11-20 14:27:38,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 53 states have (on average 1.528301886792453) internal successors, (81), 65 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:38,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 81 transitions. [2024-11-20 14:27:38,112 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 81 transitions. Word has length 10 [2024-11-20 14:27:38,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:27:38,112 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 81 transitions. [2024-11-20 14:27:38,112 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) [2024-11-20 14:27:38,112 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 81 transitions. [2024-11-20 14:27:38,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-20 14:27:38,113 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:27:38,113 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:27:38,113 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-20 14:27:38,113 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-20 14:27:38,114 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:27:38,114 INFO L85 PathProgramCache]: Analyzing trace with hash -1890276518, now seen corresponding path program 1 times [2024-11-20 14:27:38,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:27:38,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61444174] [2024-11-20 14:27:38,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:27:38,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:27:38,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:27:38,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:27:38,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:27:38,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61444174] [2024-11-20 14:27:38,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61444174] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 14:27:38,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 14:27:38,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-20 14:27:38,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520958376] [2024-11-20 14:27:38,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 14:27:38,377 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-20 14:27:38,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:27:38,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-20 14:27:38,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-11-20 14:27:38,378 INFO L87 Difference]: Start difference. First operand 66 states and 81 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 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) [2024-11-20 14:27:38,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:27:38,453 INFO L93 Difference]: Finished difference Result 73 states and 88 transitions. [2024-11-20 14:27:38,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-20 14:27:38,454 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 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 [2024-11-20 14:27:38,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:27:38,454 INFO L225 Difference]: With dead ends: 73 [2024-11-20 14:27:38,454 INFO L226 Difference]: Without dead ends: 73 [2024-11-20 14:27:38,455 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-11-20 14:27:38,455 INFO L432 NwaCegarLoop]: 42 mSDtfsCounter, 37 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-20 14:27:38,456 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 134 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-20 14:27:38,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-11-20 14:27:38,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 66. [2024-11-20 14:27:38,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 53 states have (on average 1.528301886792453) internal successors, (81), 65 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:38,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 81 transitions. [2024-11-20 14:27:38,460 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 81 transitions. Word has length 10 [2024-11-20 14:27:38,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:27:38,460 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 81 transitions. [2024-11-20 14:27:38,460 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 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) [2024-11-20 14:27:38,460 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 81 transitions. [2024-11-20 14:27:38,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-20 14:27:38,461 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:27:38,461 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:27:38,461 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-20 14:27:38,461 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-20 14:27:38,461 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:27:38,462 INFO L85 PathProgramCache]: Analyzing trace with hash -1954650589, now seen corresponding path program 1 times [2024-11-20 14:27:38,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:27:38,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792392255] [2024-11-20 14:27:38,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:27:38,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:27:38,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:27:38,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:27:38,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:27:38,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792392255] [2024-11-20 14:27:38,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792392255] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 14:27:38,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 14:27:38,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-20 14:27:38,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216630580] [2024-11-20 14:27:38,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 14:27:38,553 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 14:27:38,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:27:38,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 14:27:38,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-20 14:27:38,554 INFO L87 Difference]: Start difference. First operand 66 states and 81 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:38,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:27:38,576 INFO L93 Difference]: Finished difference Result 82 states and 99 transitions. [2024-11-20 14:27:38,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 14:27:38,576 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-11-20 14:27:38,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:27:38,577 INFO L225 Difference]: With dead ends: 82 [2024-11-20 14:27:38,577 INFO L226 Difference]: Without dead ends: 82 [2024-11-20 14:27:38,577 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 [2024-11-20 14:27:38,578 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 13 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-20 14:27:38,578 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 97 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-20 14:27:38,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2024-11-20 14:27:38,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 80. [2024-11-20 14:27:38,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 67 states have (on average 1.4776119402985075) internal successors, (99), 79 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:38,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 99 transitions. [2024-11-20 14:27:38,587 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 99 transitions. Word has length 11 [2024-11-20 14:27:38,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:27:38,587 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 99 transitions. [2024-11-20 14:27:38,587 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:38,587 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 99 transitions. [2024-11-20 14:27:38,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-20 14:27:38,588 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:27:38,588 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:27:38,588 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-20 14:27:38,589 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-20 14:27:38,589 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:27:38,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1274592219, now seen corresponding path program 1 times [2024-11-20 14:27:38,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:27:38,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820551047] [2024-11-20 14:27:38,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:27:38,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:27:38,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:27:38,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:27:38,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:27:38,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820551047] [2024-11-20 14:27:38,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820551047] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 14:27:38,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 14:27:38,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-20 14:27:38,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51433837] [2024-11-20 14:27:38,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 14:27:38,757 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 14:27:38,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:27:38,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 14:27:38,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-20 14:27:38,758 INFO L87 Difference]: Start difference. First operand 80 states and 99 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:38,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:27:38,822 INFO L93 Difference]: Finished difference Result 100 states and 121 transitions. [2024-11-20 14:27:38,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 14:27:38,823 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-11-20 14:27:38,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:27:38,824 INFO L225 Difference]: With dead ends: 100 [2024-11-20 14:27:38,824 INFO L226 Difference]: Without dead ends: 100 [2024-11-20 14:27:38,824 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-20 14:27:38,825 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 30 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 114 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 [2024-11-20 14:27:38,825 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 114 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-20 14:27:38,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2024-11-20 14:27:38,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 80. [2024-11-20 14:27:38,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 67 states have (on average 1.4776119402985075) internal successors, (99), 79 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:38,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 99 transitions. [2024-11-20 14:27:38,830 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 99 transitions. Word has length 11 [2024-11-20 14:27:38,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:27:38,831 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 99 transitions. [2024-11-20 14:27:38,831 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:38,831 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 99 transitions. [2024-11-20 14:27:38,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-20 14:27:38,832 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:27:38,832 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:27:38,832 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-20 14:27:38,833 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-20 14:27:38,833 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:27:38,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1226025170, now seen corresponding path program 1 times [2024-11-20 14:27:38,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:27:38,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487238534] [2024-11-20 14:27:38,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:27:38,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:27:38,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:27:39,007 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:27:39,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:27:39,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487238534] [2024-11-20 14:27:39,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487238534] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:27:39,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595676676] [2024-11-20 14:27:39,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:27:39,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:27:39,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:27:39,011 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) [2024-11-20 14:27:39,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-20 14:27:39,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:27:39,072 INFO L255 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-20 14:27:39,076 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 14:27:39,196 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 [2024-11-20 14:27:39,205 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 [2024-11-20 14:27:39,392 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:27:39,393 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 14:27:39,575 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:27:39,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595676676] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 14:27:39,576 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 14:27:39,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 15 [2024-11-20 14:27:39,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609474935] [2024-11-20 14:27:39,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 14:27:39,577 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-20 14:27:39,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:27:39,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-20 14:27:39,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2024-11-20 14:27:39,579 INFO L87 Difference]: Start difference. First operand 80 states and 99 transitions. Second operand has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:39,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:27:39,744 INFO L93 Difference]: Finished difference Result 85 states and 105 transitions. [2024-11-20 14:27:39,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-20 14:27:39,745 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-11-20 14:27:39,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:27:39,745 INFO L225 Difference]: With dead ends: 85 [2024-11-20 14:27:39,745 INFO L226 Difference]: Without dead ends: 85 [2024-11-20 14:27:39,746 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=127, Invalid=253, Unknown=0, NotChecked=0, Total=380 [2024-11-20 14:27:39,746 INFO L432 NwaCegarLoop]: 46 mSDtfsCounter, 23 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-20 14:27:39,746 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 198 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-20 14:27:39,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2024-11-20 14:27:39,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 77. [2024-11-20 14:27:39,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 65 states have (on average 1.4615384615384615) internal successors, (95), 76 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:39,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 95 transitions. [2024-11-20 14:27:39,755 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 95 transitions. Word has length 11 [2024-11-20 14:27:39,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:27:39,755 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 95 transitions. [2024-11-20 14:27:39,755 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:39,755 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 95 transitions. [2024-11-20 14:27:39,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-20 14:27:39,756 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:27:39,756 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:27:39,768 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-20 14:27:39,956 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-20 14:27:39,957 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-20 14:27:39,958 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:27:39,958 INFO L85 PathProgramCache]: Analyzing trace with hash -1862804906, now seen corresponding path program 1 times [2024-11-20 14:27:39,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:27:39,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146170408] [2024-11-20 14:27:39,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:27:39,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:27:39,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:27:40,167 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:27:40,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:27:40,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146170408] [2024-11-20 14:27:40,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146170408] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:27:40,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323678538] [2024-11-20 14:27:40,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:27:40,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:27:40,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:27:40,171 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) [2024-11-20 14:27:40,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-20 14:27:40,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:27:40,227 INFO L255 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-20 14:27:40,228 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 14:27:40,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-20 14:27:40,260 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 [2024-11-20 14:27:40,269 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 [2024-11-20 14:27:40,440 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:27:40,440 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 14:27:40,638 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-20 14:27:40,659 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:27:40,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323678538] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 14:27:40,660 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 14:27:40,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2024-11-20 14:27:40,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205545327] [2024-11-20 14:27:40,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 14:27:40,660 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-20 14:27:40,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:27:40,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-20 14:27:40,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2024-11-20 14:27:40,661 INFO L87 Difference]: Start difference. First operand 77 states and 95 transitions. Second operand has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:40,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:27:40,864 INFO L93 Difference]: Finished difference Result 82 states and 101 transitions. [2024-11-20 14:27:40,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-20 14:27:40,864 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-11-20 14:27:40,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:27:40,865 INFO L225 Difference]: With dead ends: 82 [2024-11-20 14:27:40,865 INFO L226 Difference]: Without dead ends: 82 [2024-11-20 14:27:40,865 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2024-11-20 14:27:40,866 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 38 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-20 14:27:40,866 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 242 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-20 14:27:40,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2024-11-20 14:27:40,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 74. [2024-11-20 14:27:40,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 63 states have (on average 1.4444444444444444) internal successors, (91), 73 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) [2024-11-20 14:27:40,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 91 transitions. [2024-11-20 14:27:40,875 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 91 transitions. Word has length 13 [2024-11-20 14:27:40,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:27:40,875 INFO L471 AbstractCegarLoop]: Abstraction has 74 states and 91 transitions. [2024-11-20 14:27:40,875 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:40,875 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 91 transitions. [2024-11-20 14:27:40,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-20 14:27:40,876 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:27:40,876 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:27:40,886 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-20 14:27:41,076 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 [2024-11-20 14:27:41,077 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-20 14:27:41,077 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:27:41,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1912378889, now seen corresponding path program 1 times [2024-11-20 14:27:41,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:27:41,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274979371] [2024-11-20 14:27:41,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:27:41,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:27:41,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:27:41,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:27:41,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:27:41,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274979371] [2024-11-20 14:27:41,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274979371] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:27:41,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111593652] [2024-11-20 14:27:41,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:27:41,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:27:41,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:27:41,287 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) [2024-11-20 14:27:41,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-20 14:27:41,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:27:41,342 INFO L255 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-20 14:27:41,343 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 14:27:41,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-20 14:27:41,372 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 [2024-11-20 14:27:41,377 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 [2024-11-20 14:27:41,495 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:27:41,495 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 14:27:41,603 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-20 14:27:41,628 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:27:41,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111593652] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-20 14:27:41,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-20 14:27:41,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 14 [2024-11-20 14:27:41,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127109231] [2024-11-20 14:27:41,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 14:27:41,628 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-20 14:27:41,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:27:41,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-20 14:27:41,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2024-11-20 14:27:41,629 INFO L87 Difference]: Start difference. First operand 74 states and 91 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:41,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:27:41,746 INFO L93 Difference]: Finished difference Result 73 states and 89 transitions. [2024-11-20 14:27:41,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-20 14:27:41,747 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-11-20 14:27:41,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:27:41,747 INFO L225 Difference]: With dead ends: 73 [2024-11-20 14:27:41,747 INFO L226 Difference]: Without dead ends: 73 [2024-11-20 14:27:41,747 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2024-11-20 14:27:41,748 INFO L432 NwaCegarLoop]: 42 mSDtfsCounter, 27 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-20 14:27:41,748 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 154 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-20 14:27:41,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-11-20 14:27:41,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 67. [2024-11-20 14:27:41,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 57 states have (on average 1.4210526315789473) internal successors, (81), 66 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:41,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 81 transitions. [2024-11-20 14:27:41,758 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 81 transitions. Word has length 14 [2024-11-20 14:27:41,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:27:41,758 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 81 transitions. [2024-11-20 14:27:41,758 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:41,758 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 81 transitions. [2024-11-20 14:27:41,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-20 14:27:41,761 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:27:41,761 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:27:41,769 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-20 14:27:41,962 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:27:41,962 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-20 14:27:41,962 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:27:41,962 INFO L85 PathProgramCache]: Analyzing trace with hash 712803304, now seen corresponding path program 1 times [2024-11-20 14:27:41,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:27:41,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419554843] [2024-11-20 14:27:41,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:27:41,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:27:41,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:27:42,137 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:27:42,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:27:42,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419554843] [2024-11-20 14:27:42,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419554843] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 14:27:42,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 14:27:42,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-20 14:27:42,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771280967] [2024-11-20 14:27:42,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 14:27:42,139 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-20 14:27:42,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:27:42,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-20 14:27:42,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-20 14:27:42,139 INFO L87 Difference]: Start difference. First operand 67 states and 81 transitions. Second operand has 7 states, 6 states have (on average 2.5) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:42,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:27:42,186 INFO L93 Difference]: Finished difference Result 66 states and 80 transitions. [2024-11-20 14:27:42,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-20 14:27:42,187 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2024-11-20 14:27:42,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:27:42,189 INFO L225 Difference]: With dead ends: 66 [2024-11-20 14:27:42,189 INFO L226 Difference]: Without dead ends: 66 [2024-11-20 14:27:42,189 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-20 14:27:42,190 INFO L432 NwaCegarLoop]: 43 mSDtfsCounter, 10 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-20 14:27:42,190 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 123 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-20 14:27:42,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-11-20 14:27:42,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2024-11-20 14:27:42,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 45 states have (on average 1.4444444444444444) internal successors, (65), 53 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:42,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2024-11-20 14:27:42,192 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 15 [2024-11-20 14:27:42,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:27:42,192 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2024-11-20 14:27:42,193 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:42,193 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2024-11-20 14:27:42,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-20 14:27:42,194 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:27:42,194 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:27:42,194 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-20 14:27:42,195 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-20 14:27:42,195 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:27:42,195 INFO L85 PathProgramCache]: Analyzing trace with hash 1027311455, now seen corresponding path program 1 times [2024-11-20 14:27:42,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:27:42,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035736442] [2024-11-20 14:27:42,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:27:42,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:27:42,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:27:42,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:27:42,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:27:42,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035736442] [2024-11-20 14:27:42,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035736442] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 14:27:42,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 14:27:42,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-20 14:27:42,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4697196] [2024-11-20 14:27:42,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 14:27:42,239 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 14:27:42,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:27:42,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 14:27:42,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 14:27:42,240 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:42,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:27:42,275 INFO L93 Difference]: Finished difference Result 60 states and 72 transitions. [2024-11-20 14:27:42,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 14:27:42,275 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2024-11-20 14:27:42,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:27:42,276 INFO L225 Difference]: With dead ends: 60 [2024-11-20 14:27:42,276 INFO L226 Difference]: Without dead ends: 60 [2024-11-20 14:27:42,276 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 [2024-11-20 14:27:42,277 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 32 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-20 14:27:42,277 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 75 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-20 14:27:42,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-11-20 14:27:42,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 53. [2024-11-20 14:27:42,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 45 states have (on average 1.4222222222222223) internal successors, (64), 52 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:42,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 64 transitions. [2024-11-20 14:27:42,278 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 64 transitions. Word has length 16 [2024-11-20 14:27:42,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:27:42,278 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 64 transitions. [2024-11-20 14:27:42,278 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:42,279 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 64 transitions. [2024-11-20 14:27:42,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-20 14:27:42,279 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:27:42,279 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:27:42,282 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-20 14:27:42,282 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-20 14:27:42,283 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:27:42,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1027311456, now seen corresponding path program 1 times [2024-11-20 14:27:42,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:27:42,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119444040] [2024-11-20 14:27:42,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:27:42,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:27:42,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:27:42,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:27:42,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:27:42,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119444040] [2024-11-20 14:27:42,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119444040] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 14:27:42,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 14:27:42,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-20 14:27:42,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013928683] [2024-11-20 14:27:42,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 14:27:42,353 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 14:27:42,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:27:42,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 14:27:42,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 14:27:42,354 INFO L87 Difference]: Start difference. First operand 53 states and 64 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:42,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:27:42,376 INFO L93 Difference]: Finished difference Result 59 states and 70 transitions. [2024-11-20 14:27:42,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 14:27:42,376 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2024-11-20 14:27:42,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:27:42,377 INFO L225 Difference]: With dead ends: 59 [2024-11-20 14:27:42,377 INFO L226 Difference]: Without dead ends: 59 [2024-11-20 14:27:42,377 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 14:27:42,378 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 5 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 124 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 [2024-11-20 14:27:42,378 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 124 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-20 14:27:42,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-11-20 14:27:42,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2024-11-20 14:27:42,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 50 states have (on average 1.38) internal successors, (69), 57 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:42,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 69 transitions. [2024-11-20 14:27:42,380 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 69 transitions. Word has length 16 [2024-11-20 14:27:42,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:27:42,380 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 69 transitions. [2024-11-20 14:27:42,380 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:42,380 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 69 transitions. [2024-11-20 14:27:42,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-20 14:27:42,381 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:27:42,381 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:27:42,381 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-20 14:27:42,381 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-20 14:27:42,382 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:27:42,382 INFO L85 PathProgramCache]: Analyzing trace with hash 1026512128, now seen corresponding path program 1 times [2024-11-20 14:27:42,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:27:42,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898615988] [2024-11-20 14:27:42,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:27:42,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:27:42,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:27:42,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:27:42,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:27:42,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898615988] [2024-11-20 14:27:42,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898615988] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 14:27:42,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 14:27:42,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-20 14:27:42,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819764863] [2024-11-20 14:27:42,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 14:27:42,442 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 14:27:42,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:27:42,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 14:27:42,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-20 14:27:42,442 INFO L87 Difference]: Start difference. First operand 58 states and 69 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:42,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:27:42,486 INFO L93 Difference]: Finished difference Result 57 states and 68 transitions. [2024-11-20 14:27:42,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 14:27:42,487 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2024-11-20 14:27:42,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:27:42,487 INFO L225 Difference]: With dead ends: 57 [2024-11-20 14:27:42,488 INFO L226 Difference]: Without dead ends: 57 [2024-11-20 14:27:42,488 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 [2024-11-20 14:27:42,488 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 34 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-20 14:27:42,489 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 96 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-20 14:27:42,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-11-20 14:27:42,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2024-11-20 14:27:42,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 50 states have (on average 1.36) internal successors, (68), 56 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:42,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 68 transitions. [2024-11-20 14:27:42,490 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 68 transitions. Word has length 16 [2024-11-20 14:27:42,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:27:42,490 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 68 transitions. [2024-11-20 14:27:42,491 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:42,491 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 68 transitions. [2024-11-20 14:27:42,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-20 14:27:42,491 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:27:42,491 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:27:42,491 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-20 14:27:42,492 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-20 14:27:42,492 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:27:42,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1026512129, now seen corresponding path program 1 times [2024-11-20 14:27:42,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:27:42,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802857521] [2024-11-20 14:27:42,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:27:42,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:27:42,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:27:42,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:27:42,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:27:42,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802857521] [2024-11-20 14:27:42,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802857521] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 14:27:42,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 14:27:42,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-20 14:27:42,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982059] [2024-11-20 14:27:42,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 14:27:42,641 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-20 14:27:42,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:27:42,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-20 14:27:42,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-20 14:27:42,642 INFO L87 Difference]: Start difference. First operand 57 states and 68 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:42,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:27:42,717 INFO L93 Difference]: Finished difference Result 83 states and 100 transitions. [2024-11-20 14:27:42,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-20 14:27:42,717 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2024-11-20 14:27:42,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:27:42,718 INFO L225 Difference]: With dead ends: 83 [2024-11-20 14:27:42,718 INFO L226 Difference]: Without dead ends: 83 [2024-11-20 14:27:42,718 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 [2024-11-20 14:27:42,719 INFO L432 NwaCegarLoop]: 43 mSDtfsCounter, 37 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-20 14:27:42,719 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 160 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-20 14:27:42,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2024-11-20 14:27:42,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 60. [2024-11-20 14:27:42,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 53 states have (on average 1.3584905660377358) internal successors, (72), 59 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) [2024-11-20 14:27:42,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 72 transitions. [2024-11-20 14:27:42,721 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 72 transitions. Word has length 16 [2024-11-20 14:27:42,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:27:42,721 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 72 transitions. [2024-11-20 14:27:42,722 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:42,722 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 72 transitions. [2024-11-20 14:27:42,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-20 14:27:42,722 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:27:42,722 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:27:42,722 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-20 14:27:42,723 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-20 14:27:42,723 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:27:42,723 INFO L85 PathProgramCache]: Analyzing trace with hash 440505442, now seen corresponding path program 1 times [2024-11-20 14:27:42,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:27:42,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740860507] [2024-11-20 14:27:42,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:27:42,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:27:42,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:27:42,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:27:42,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:27:42,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740860507] [2024-11-20 14:27:42,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740860507] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 14:27:42,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 14:27:42,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-20 14:27:42,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651687657] [2024-11-20 14:27:42,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 14:27:42,795 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 14:27:42,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:27:42,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 14:27:42,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-20 14:27:42,796 INFO L87 Difference]: Start difference. First operand 60 states and 72 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:42,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:27:42,817 INFO L93 Difference]: Finished difference Result 60 states and 71 transitions. [2024-11-20 14:27:42,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 14:27:42,817 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2024-11-20 14:27:42,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:27:42,818 INFO L225 Difference]: With dead ends: 60 [2024-11-20 14:27:42,818 INFO L226 Difference]: Without dead ends: 60 [2024-11-20 14:27:42,818 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-20 14:27:42,819 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 18 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-20 14:27:42,819 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 102 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-20 14:27:42,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-11-20 14:27:42,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 55. [2024-11-20 14:27:42,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 48 states have (on average 1.375) internal successors, (66), 54 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:42,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 66 transitions. [2024-11-20 14:27:42,821 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 66 transitions. Word has length 16 [2024-11-20 14:27:42,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:27:42,822 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 66 transitions. [2024-11-20 14:27:42,822 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:42,822 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 66 transitions. [2024-11-20 14:27:42,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-20 14:27:42,822 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:27:42,822 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:27:42,822 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-20 14:27:42,823 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-20 14:27:42,823 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:27:42,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1757104941, now seen corresponding path program 1 times [2024-11-20 14:27:42,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:27:42,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902873199] [2024-11-20 14:27:42,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:27:42,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:27:42,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:27:42,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:27:42,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:27:42,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902873199] [2024-11-20 14:27:42,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902873199] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 14:27:42,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 14:27:42,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-20 14:27:42,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948383984] [2024-11-20 14:27:42,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 14:27:42,870 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 14:27:42,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:27:42,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 14:27:42,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-20 14:27:42,871 INFO L87 Difference]: Start difference. First operand 55 states and 66 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:42,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:27:42,916 INFO L93 Difference]: Finished difference Result 61 states and 73 transitions. [2024-11-20 14:27:42,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 14:27:42,917 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2024-11-20 14:27:42,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:27:42,917 INFO L225 Difference]: With dead ends: 61 [2024-11-20 14:27:42,917 INFO L226 Difference]: Without dead ends: 61 [2024-11-20 14:27:42,917 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 [2024-11-20 14:27:42,918 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 31 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-20 14:27:42,918 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 97 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-20 14:27:42,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-11-20 14:27:42,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 54. [2024-11-20 14:27:42,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 48 states have (on average 1.3541666666666667) internal successors, (65), 53 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:42,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2024-11-20 14:27:42,920 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 17 [2024-11-20 14:27:42,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:27:42,920 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2024-11-20 14:27:42,920 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:42,920 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2024-11-20 14:27:42,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-20 14:27:42,921 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:27:42,921 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:27:42,921 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-20 14:27:42,921 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-20 14:27:42,922 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:27:42,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1757104942, now seen corresponding path program 1 times [2024-11-20 14:27:42,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:27:42,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608043664] [2024-11-20 14:27:42,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:27:42,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:27:42,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:27:43,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:27:43,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:27:43,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608043664] [2024-11-20 14:27:43,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608043664] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 14:27:43,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 14:27:43,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-20 14:27:43,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401001647] [2024-11-20 14:27:43,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 14:27:43,044 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-20 14:27:43,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:27:43,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-20 14:27:43,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-20 14:27:43,044 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:43,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:27:43,115 INFO L93 Difference]: Finished difference Result 69 states and 84 transitions. [2024-11-20 14:27:43,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-20 14:27:43,115 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2024-11-20 14:27:43,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:27:43,117 INFO L225 Difference]: With dead ends: 69 [2024-11-20 14:27:43,117 INFO L226 Difference]: Without dead ends: 69 [2024-11-20 14:27:43,117 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 [2024-11-20 14:27:43,118 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 37 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-20 14:27:43,118 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 141 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-20 14:27:43,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-11-20 14:27:43,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 58. [2024-11-20 14:27:43,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 52 states have (on average 1.3653846153846154) internal successors, (71), 57 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:43,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 71 transitions. [2024-11-20 14:27:43,120 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 71 transitions. Word has length 17 [2024-11-20 14:27:43,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:27:43,121 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 71 transitions. [2024-11-20 14:27:43,121 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:43,121 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 71 transitions. [2024-11-20 14:27:43,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-20 14:27:43,133 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:27:43,133 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:27:43,133 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-11-20 14:27:43,133 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-20 14:27:43,135 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:27:43,135 INFO L85 PathProgramCache]: Analyzing trace with hash 655239723, now seen corresponding path program 1 times [2024-11-20 14:27:43,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:27:43,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070686907] [2024-11-20 14:27:43,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:27:43,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:27:43,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:27:43,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:27:43,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:27:43,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070686907] [2024-11-20 14:27:43,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070686907] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 14:27:43,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 14:27:43,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-20 14:27:43,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571281799] [2024-11-20 14:27:43,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 14:27:43,266 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 14:27:43,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:27:43,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 14:27:43,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 14:27:43,267 INFO L87 Difference]: Start difference. First operand 58 states and 71 transitions. Second operand has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:43,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:27:43,291 INFO L93 Difference]: Finished difference Result 57 states and 70 transitions. [2024-11-20 14:27:43,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 14:27:43,292 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2024-11-20 14:27:43,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:27:43,292 INFO L225 Difference]: With dead ends: 57 [2024-11-20 14:27:43,292 INFO L226 Difference]: Without dead ends: 54 [2024-11-20 14:27:43,293 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 14:27:43,293 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 28 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 68 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 [2024-11-20 14:27:43,294 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 68 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-20 14:27:43,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-11-20 14:27:43,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2024-11-20 14:27:43,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.3265306122448979) internal successors, (65), 53 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:43,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2024-11-20 14:27:43,296 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 19 [2024-11-20 14:27:43,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:27:43,296 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2024-11-20 14:27:43,296 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:43,296 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2024-11-20 14:27:43,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-20 14:27:43,297 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:27:43,297 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:27:43,297 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-11-20 14:27:43,298 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-20 14:27:43,298 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:27:43,298 INFO L85 PathProgramCache]: Analyzing trace with hash 654445393, now seen corresponding path program 1 times [2024-11-20 14:27:43,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:27:43,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052603727] [2024-11-20 14:27:43,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:27:43,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:27:43,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:27:43,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:27:43,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:27:43,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052603727] [2024-11-20 14:27:43,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052603727] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 14:27:43,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 14:27:43,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-20 14:27:43,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940851599] [2024-11-20 14:27:43,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 14:27:43,363 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 14:27:43,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:27:43,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 14:27:43,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-20 14:27:43,363 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:43,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:27:43,402 INFO L93 Difference]: Finished difference Result 53 states and 64 transitions. [2024-11-20 14:27:43,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 14:27:43,402 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2024-11-20 14:27:43,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:27:43,403 INFO L225 Difference]: With dead ends: 53 [2024-11-20 14:27:43,403 INFO L226 Difference]: Without dead ends: 53 [2024-11-20 14:27:43,403 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 [2024-11-20 14:27:43,403 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 25 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-20 14:27:43,404 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 84 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-20 14:27:43,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-11-20 14:27:43,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2024-11-20 14:27:43,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 49 states have (on average 1.3061224489795917) internal successors, (64), 52 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:43,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 64 transitions. [2024-11-20 14:27:43,405 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 64 transitions. Word has length 19 [2024-11-20 14:27:43,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:27:43,405 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 64 transitions. [2024-11-20 14:27:43,405 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:43,405 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 64 transitions. [2024-11-20 14:27:43,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-20 14:27:43,406 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:27:43,406 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:27:43,406 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-11-20 14:27:43,407 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-20 14:27:43,407 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:27:43,407 INFO L85 PathProgramCache]: Analyzing trace with hash 654445394, now seen corresponding path program 1 times [2024-11-20 14:27:43,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:27:43,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051250174] [2024-11-20 14:27:43,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:27:43,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:27:43,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:27:43,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:27:43,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:27:43,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051250174] [2024-11-20 14:27:43,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051250174] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 14:27:43,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 14:27:43,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-20 14:27:43,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262157349] [2024-11-20 14:27:43,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 14:27:43,460 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 14:27:43,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:27:43,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 14:27:43,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 14:27:43,461 INFO L87 Difference]: Start difference. First operand 53 states and 64 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:43,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:27:43,478 INFO L93 Difference]: Finished difference Result 73 states and 87 transitions. [2024-11-20 14:27:43,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 14:27:43,478 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2024-11-20 14:27:43,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:27:43,479 INFO L225 Difference]: With dead ends: 73 [2024-11-20 14:27:43,479 INFO L226 Difference]: Without dead ends: 73 [2024-11-20 14:27:43,479 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 14:27:43,479 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 11 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-20 14:27:43,480 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 103 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-20 14:27:43,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-11-20 14:27:43,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2024-11-20 14:27:43,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 67 states have (on average 1.2985074626865671) internal successors, (87), 70 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:43,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 87 transitions. [2024-11-20 14:27:43,483 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 87 transitions. Word has length 19 [2024-11-20 14:27:43,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:27:43,483 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 87 transitions. [2024-11-20 14:27:43,483 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:43,483 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 87 transitions. [2024-11-20 14:27:43,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-20 14:27:43,484 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:27:43,484 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:27:43,484 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-11-20 14:27:43,484 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-20 14:27:43,484 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:27:43,485 INFO L85 PathProgramCache]: Analyzing trace with hash -366622960, now seen corresponding path program 1 times [2024-11-20 14:27:43,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:27:43,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614081270] [2024-11-20 14:27:43,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:27:43,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:27:43,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:27:43,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:27:43,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:27:43,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614081270] [2024-11-20 14:27:43,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614081270] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 14:27:43,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 14:27:43,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-20 14:27:43,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412739540] [2024-11-20 14:27:43,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 14:27:43,575 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-20 14:27:43,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:27:43,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-20 14:27:43,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-20 14:27:43,576 INFO L87 Difference]: Start difference. First operand 71 states and 87 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:43,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:27:43,600 INFO L93 Difference]: Finished difference Result 71 states and 85 transitions. [2024-11-20 14:27:43,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-20 14:27:43,600 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2024-11-20 14:27:43,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:27:43,601 INFO L225 Difference]: With dead ends: 71 [2024-11-20 14:27:43,601 INFO L226 Difference]: Without dead ends: 71 [2024-11-20 14:27:43,601 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-20 14:27:43,601 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 25 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-20 14:27:43,602 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 98 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-20 14:27:43,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-11-20 14:27:43,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 53. [2024-11-20 14:27:43,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 49 states have (on average 1.2653061224489797) internal successors, (62), 52 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:43,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2024-11-20 14:27:43,603 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 19 [2024-11-20 14:27:43,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:27:43,603 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2024-11-20 14:27:43,604 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:43,604 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2024-11-20 14:27:43,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-20 14:27:43,604 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:27:43,604 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:27:43,604 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-11-20 14:27:43,605 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-20 14:27:43,605 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:27:43,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1187186856, now seen corresponding path program 1 times [2024-11-20 14:27:43,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:27:43,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859469693] [2024-11-20 14:27:43,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:27:43,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:27:43,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:27:43,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:27:43,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:27:43,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859469693] [2024-11-20 14:27:43,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859469693] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 14:27:43,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 14:27:43,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-20 14:27:43,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67187877] [2024-11-20 14:27:43,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 14:27:43,764 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-20 14:27:43,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:27:43,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-20 14:27:43,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-20 14:27:43,765 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 7 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) [2024-11-20 14:27:43,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:27:43,838 INFO L93 Difference]: Finished difference Result 69 states and 81 transitions. [2024-11-20 14:27:43,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-20 14:27:43,839 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 7 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 [2024-11-20 14:27:43,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:27:43,840 INFO L225 Difference]: With dead ends: 69 [2024-11-20 14:27:43,840 INFO L226 Difference]: Without dead ends: 69 [2024-11-20 14:27:43,840 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 [2024-11-20 14:27:43,841 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 21 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-20 14:27:43,841 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 141 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-20 14:27:43,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-11-20 14:27:43,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 55. [2024-11-20 14:27:43,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 51 states have (on average 1.2549019607843137) internal successors, (64), 54 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) [2024-11-20 14:27:43,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2024-11-20 14:27:43,843 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 20 [2024-11-20 14:27:43,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:27:43,843 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2024-11-20 14:27:43,843 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 7 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) [2024-11-20 14:27:43,843 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2024-11-20 14:27:43,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-20 14:27:43,844 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:27:43,844 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:27:43,844 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-11-20 14:27:43,844 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-20 14:27:43,845 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:27:43,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1230007238, now seen corresponding path program 1 times [2024-11-20 14:27:43,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:27:43,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374970028] [2024-11-20 14:27:43,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:27:43,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:27:43,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:27:43,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:27:43,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:27:43,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374970028] [2024-11-20 14:27:43,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374970028] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 14:27:43,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 14:27:43,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-20 14:27:43,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224527098] [2024-11-20 14:27:43,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 14:27:43,918 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 14:27:43,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:27:43,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 14:27:43,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-20 14:27:43,919 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:43,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:27:43,946 INFO L93 Difference]: Finished difference Result 62 states and 71 transitions. [2024-11-20 14:27:43,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 14:27:43,946 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2024-11-20 14:27:43,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:27:43,947 INFO L225 Difference]: With dead ends: 62 [2024-11-20 14:27:43,947 INFO L226 Difference]: Without dead ends: 62 [2024-11-20 14:27:43,947 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-20 14:27:43,947 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 4 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-20 14:27:43,948 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 126 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-20 14:27:43,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-11-20 14:27:43,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2024-11-20 14:27:43,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 58 states have (on average 1.2241379310344827) internal successors, (71), 61 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:43,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 71 transitions. [2024-11-20 14:27:43,949 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 71 transitions. Word has length 21 [2024-11-20 14:27:43,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:27:43,950 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 71 transitions. [2024-11-20 14:27:43,950 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:43,950 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 71 transitions. [2024-11-20 14:27:43,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-20 14:27:43,950 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:27:43,950 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:27:43,951 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-11-20 14:27:43,951 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-20 14:27:43,951 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:27:43,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1070815352, now seen corresponding path program 1 times [2024-11-20 14:27:43,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:27:43,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884874809] [2024-11-20 14:27:43,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:27:43,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:27:43,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:27:44,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:27:44,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:27:44,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884874809] [2024-11-20 14:27:44,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884874809] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 14:27:44,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 14:27:44,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-20 14:27:44,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107332014] [2024-11-20 14:27:44,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 14:27:44,045 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-20 14:27:44,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:27:44,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-20 14:27:44,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-20 14:27:44,046 INFO L87 Difference]: Start difference. First operand 62 states and 71 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:44,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:27:44,091 INFO L93 Difference]: Finished difference Result 73 states and 83 transitions. [2024-11-20 14:27:44,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-20 14:27:44,092 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2024-11-20 14:27:44,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:27:44,092 INFO L225 Difference]: With dead ends: 73 [2024-11-20 14:27:44,092 INFO L226 Difference]: Without dead ends: 73 [2024-11-20 14:27:44,092 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-11-20 14:27:44,093 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 30 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-20 14:27:44,093 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 122 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-20 14:27:44,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-11-20 14:27:44,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 63. [2024-11-20 14:27:44,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 59 states have (on average 1.2372881355932204) internal successors, (73), 62 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:44,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 73 transitions. [2024-11-20 14:27:44,095 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 73 transitions. Word has length 21 [2024-11-20 14:27:44,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:27:44,095 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 73 transitions. [2024-11-20 14:27:44,096 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:44,096 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 73 transitions. [2024-11-20 14:27:44,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-20 14:27:44,096 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:27:44,096 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:27:44,096 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-11-20 14:27:44,096 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-20 14:27:44,097 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:27:44,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1572106845, now seen corresponding path program 1 times [2024-11-20 14:27:44,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:27:44,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092457449] [2024-11-20 14:27:44,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:27:44,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:27:44,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:27:44,230 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:27:44,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:27:44,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092457449] [2024-11-20 14:27:44,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092457449] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 14:27:44,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 14:27:44,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-20 14:27:44,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132958400] [2024-11-20 14:27:44,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 14:27:44,232 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-20 14:27:44,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:27:44,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-20 14:27:44,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-11-20 14:27:44,233 INFO L87 Difference]: Start difference. First operand 63 states and 73 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:44,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:27:44,272 INFO L93 Difference]: Finished difference Result 91 states and 103 transitions. [2024-11-20 14:27:44,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-20 14:27:44,273 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2024-11-20 14:27:44,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:27:44,273 INFO L225 Difference]: With dead ends: 91 [2024-11-20 14:27:44,273 INFO L226 Difference]: Without dead ends: 74 [2024-11-20 14:27:44,273 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-11-20 14:27:44,274 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 9 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-20 14:27:44,274 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 186 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-20 14:27:44,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-11-20 14:27:44,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2024-11-20 14:27:44,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 70 states have (on average 1.2) internal successors, (84), 73 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:44,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 84 transitions. [2024-11-20 14:27:44,276 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 84 transitions. Word has length 23 [2024-11-20 14:27:44,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:27:44,277 INFO L471 AbstractCegarLoop]: Abstraction has 74 states and 84 transitions. [2024-11-20 14:27:44,277 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:44,277 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 84 transitions. [2024-11-20 14:27:44,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-20 14:27:44,277 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:27:44,277 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:27:44,278 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-11-20 14:27:44,278 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-20 14:27:44,278 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:27:44,278 INFO L85 PathProgramCache]: Analyzing trace with hash 1994808671, now seen corresponding path program 1 times [2024-11-20 14:27:44,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:27:44,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47573765] [2024-11-20 14:27:44,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:27:44,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:27:44,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:27:44,479 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:27:44,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:27:44,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47573765] [2024-11-20 14:27:44,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47573765] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 14:27:44,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 14:27:44,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-20 14:27:44,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840394778] [2024-11-20 14:27:44,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 14:27:44,480 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-20 14:27:44,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:27:44,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-20 14:27:44,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-11-20 14:27:44,481 INFO L87 Difference]: Start difference. First operand 74 states and 84 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:44,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:27:44,539 INFO L93 Difference]: Finished difference Result 110 states and 124 transitions. [2024-11-20 14:27:44,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-20 14:27:44,540 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2024-11-20 14:27:44,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:27:44,540 INFO L225 Difference]: With dead ends: 110 [2024-11-20 14:27:44,540 INFO L226 Difference]: Without dead ends: 95 [2024-11-20 14:27:44,541 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-11-20 14:27:44,541 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 22 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-20 14:27:44,541 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 212 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-20 14:27:44,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-11-20 14:27:44,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 76. [2024-11-20 14:27:44,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 72 states have (on average 1.2083333333333333) internal successors, (87), 75 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:44,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 87 transitions. [2024-11-20 14:27:44,544 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 87 transitions. Word has length 23 [2024-11-20 14:27:44,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:27:44,544 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 87 transitions. [2024-11-20 14:27:44,544 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:44,544 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 87 transitions. [2024-11-20 14:27:44,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-20 14:27:44,544 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:27:44,545 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:27:44,545 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-11-20 14:27:44,545 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-20 14:27:44,545 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:27:44,545 INFO L85 PathProgramCache]: Analyzing trace with hash 2031371707, now seen corresponding path program 1 times [2024-11-20 14:27:44,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:27:44,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124351501] [2024-11-20 14:27:44,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:27:44,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:27:44,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:27:44,723 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:27:44,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:27:44,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124351501] [2024-11-20 14:27:44,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124351501] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:27:44,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587709544] [2024-11-20 14:27:44,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:27:44,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:27:44,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:27:44,727 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) [2024-11-20 14:27:44,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-20 14:27:44,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:27:44,816 INFO L255 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-20 14:27:44,818 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 14:27:44,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:27:44,868 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 14:27:44,906 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 14:27:44,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587709544] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-20 14:27:44,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-20 14:27:44,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9, 5] total 14 [2024-11-20 14:27:44,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559457288] [2024-11-20 14:27:44,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 14:27:44,908 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 14:27:44,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:27:44,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 14:27:44,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2024-11-20 14:27:44,909 INFO L87 Difference]: Start difference. First operand 76 states and 87 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:44,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:27:44,918 INFO L93 Difference]: Finished difference Result 77 states and 87 transitions. [2024-11-20 14:27:44,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 14:27:44,919 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2024-11-20 14:27:44,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:27:44,919 INFO L225 Difference]: With dead ends: 77 [2024-11-20 14:27:44,919 INFO L226 Difference]: Without dead ends: 76 [2024-11-20 14:27:44,920 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2024-11-20 14:27:44,920 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 6 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-20 14:27:44,920 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 65 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-20 14:27:44,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-11-20 14:27:44,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2024-11-20 14:27:44,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 72 states have (on average 1.1944444444444444) internal successors, (86), 75 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:44,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 86 transitions. [2024-11-20 14:27:44,922 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 86 transitions. Word has length 25 [2024-11-20 14:27:44,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:27:44,922 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 86 transitions. [2024-11-20 14:27:44,923 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:44,923 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 86 transitions. [2024-11-20 14:27:44,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-20 14:27:44,923 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:27:44,923 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:27:44,933 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-20 14:27:45,127 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:27:45,128 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-20 14:27:45,128 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:27:45,129 INFO L85 PathProgramCache]: Analyzing trace with hash 2031406528, now seen corresponding path program 1 times [2024-11-20 14:27:45,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:27:45,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427561286] [2024-11-20 14:27:45,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:27:45,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:27:45,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:27:45,279 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:27:45,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:27:45,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427561286] [2024-11-20 14:27:45,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427561286] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:27:45,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927282085] [2024-11-20 14:27:45,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:27:45,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:27:45,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:27:45,282 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) [2024-11-20 14:27:45,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-20 14:27:45,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:27:45,369 INFO L255 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-20 14:27:45,371 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 14:27:45,399 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 [2024-11-20 14:27:45,452 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 14:27:45,452 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-20 14:27:45,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927282085] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 14:27:45,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-20 14:27:45,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2024-11-20 14:27:45,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099181672] [2024-11-20 14:27:45,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 14:27:45,453 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-20 14:27:45,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:27:45,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-20 14:27:45,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2024-11-20 14:27:45,454 INFO L87 Difference]: Start difference. First operand 76 states and 86 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:45,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:27:45,493 INFO L93 Difference]: Finished difference Result 92 states and 102 transitions. [2024-11-20 14:27:45,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-20 14:27:45,493 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2024-11-20 14:27:45,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:27:45,494 INFO L225 Difference]: With dead ends: 92 [2024-11-20 14:27:45,494 INFO L226 Difference]: Without dead ends: 73 [2024-11-20 14:27:45,495 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2024-11-20 14:27:45,496 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 0 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-20 14:27:45,496 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 177 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-20 14:27:45,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-11-20 14:27:45,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2024-11-20 14:27:45,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 69 states have (on average 1.1884057971014492) internal successors, (82), 72 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:45,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 82 transitions. [2024-11-20 14:27:45,498 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 82 transitions. Word has length 25 [2024-11-20 14:27:45,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:27:45,499 INFO L471 AbstractCegarLoop]: Abstraction has 73 states and 82 transitions. [2024-11-20 14:27:45,499 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:45,499 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 82 transitions. [2024-11-20 14:27:45,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-20 14:27:45,500 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:27:45,500 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:27:45,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-20 14:27:45,704 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:27:45,705 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-20 14:27:45,705 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:27:45,705 INFO L85 PathProgramCache]: Analyzing trace with hash 225968194, now seen corresponding path program 1 times [2024-11-20 14:27:45,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:27:45,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089325180] [2024-11-20 14:27:45,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:27:45,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:27:45,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:27:45,828 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:27:45,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:27:45,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089325180] [2024-11-20 14:27:45,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089325180] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:27:45,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101639303] [2024-11-20 14:27:45,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:27:45,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:27:45,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:27:45,832 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) [2024-11-20 14:27:45,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-20 14:27:45,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:27:45,917 INFO L255 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-20 14:27:45,919 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 14:27:45,973 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 [2024-11-20 14:27:46,101 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-20 14:27:46,103 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 14:27:46,104 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 18 treesize of output 10 [2024-11-20 14:27:46,121 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 14:27:46,121 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-20 14:27:46,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101639303] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 14:27:46,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-20 14:27:46,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 15 [2024-11-20 14:27:46,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999141306] [2024-11-20 14:27:46,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 14:27:46,122 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-20 14:27:46,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:27:46,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-20 14:27:46,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2024-11-20 14:27:46,123 INFO L87 Difference]: Start difference. First operand 73 states and 82 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:46,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:27:46,196 INFO L93 Difference]: Finished difference Result 82 states and 90 transitions. [2024-11-20 14:27:46,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-20 14:27:46,196 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2024-11-20 14:27:46,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:27:46,197 INFO L225 Difference]: With dead ends: 82 [2024-11-20 14:27:46,197 INFO L226 Difference]: Without dead ends: 66 [2024-11-20 14:27:46,197 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2024-11-20 14:27:46,198 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 3 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-20 14:27:46,198 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 221 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-20 14:27:46,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-11-20 14:27:46,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2024-11-20 14:27:46,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 56 states have (on average 1.1964285714285714) internal successors, (67), 59 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:46,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 67 transitions. [2024-11-20 14:27:46,200 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 67 transitions. Word has length 25 [2024-11-20 14:27:46,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:27:46,200 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 67 transitions. [2024-11-20 14:27:46,200 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:46,200 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 67 transitions. [2024-11-20 14:27:46,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-20 14:27:46,201 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:27:46,201 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:27:46,209 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-20 14:27:46,405 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:27:46,406 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-20 14:27:46,406 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:27:46,406 INFO L85 PathProgramCache]: Analyzing trace with hash -767356766, now seen corresponding path program 1 times [2024-11-20 14:27:46,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:27:46,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191727708] [2024-11-20 14:27:46,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:27:46,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:27:46,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:27:46,658 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:27:46,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:27:46,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191727708] [2024-11-20 14:27:46,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191727708] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:27:46,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456926942] [2024-11-20 14:27:46,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:27:46,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:27:46,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:27:46,662 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) [2024-11-20 14:27:46,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-20 14:27:46,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:27:46,748 INFO L255 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-20 14:27:46,750 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 14:27:46,758 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 [2024-11-20 14:27:46,857 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:27:46,858 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 14:27:47,073 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:27:47,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456926942] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 14:27:47,074 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 14:27:47,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 21 [2024-11-20 14:27:47,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128030492] [2024-11-20 14:27:47,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 14:27:47,074 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-20 14:27:47,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:27:47,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-20 14:27:47,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2024-11-20 14:27:47,078 INFO L87 Difference]: Start difference. First operand 60 states and 67 transitions. Second operand has 22 states, 21 states have (on average 3.3333333333333335) internal successors, (70), 22 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:47,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:27:47,276 INFO L93 Difference]: Finished difference Result 76 states and 84 transitions. [2024-11-20 14:27:47,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-20 14:27:47,276 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.3333333333333335) internal successors, (70), 22 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2024-11-20 14:27:47,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:27:47,277 INFO L225 Difference]: With dead ends: 76 [2024-11-20 14:27:47,277 INFO L226 Difference]: Without dead ends: 76 [2024-11-20 14:27:47,277 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2024-11-20 14:27:47,278 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 41 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-20 14:27:47,278 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 247 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-20 14:27:47,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-11-20 14:27:47,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 69. [2024-11-20 14:27:47,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 65 states have (on average 1.2) internal successors, (78), 68 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) [2024-11-20 14:27:47,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 78 transitions. [2024-11-20 14:27:47,280 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 78 transitions. Word has length 27 [2024-11-20 14:27:47,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:27:47,280 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 78 transitions. [2024-11-20 14:27:47,280 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.3333333333333335) internal successors, (70), 22 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:47,280 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 78 transitions. [2024-11-20 14:27:47,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-20 14:27:47,281 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:27:47,281 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:27:47,290 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-20 14:27:47,485 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:27:47,486 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-20 14:27:47,486 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:27:47,486 INFO L85 PathProgramCache]: Analyzing trace with hash -82042939, now seen corresponding path program 1 times [2024-11-20 14:27:47,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:27:47,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425340690] [2024-11-20 14:27:47,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:27:47,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:27:47,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:27:47,794 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 14:27:47,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:27:47,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425340690] [2024-11-20 14:27:47,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425340690] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:27:47,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468165603] [2024-11-20 14:27:47,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:27:47,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:27:47,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:27:47,798 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) [2024-11-20 14:27:47,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-20 14:27:47,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:27:47,892 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-20 14:27:47,894 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 14:27:47,902 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 [2024-11-20 14:27:48,005 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 14:27:48,005 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 14:27:48,220 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 14:27:48,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468165603] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 14:27:48,220 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 14:27:48,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 21 [2024-11-20 14:27:48,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879327620] [2024-11-20 14:27:48,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 14:27:48,221 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-20 14:27:48,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:27:48,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-20 14:27:48,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2024-11-20 14:27:48,222 INFO L87 Difference]: Start difference. First operand 69 states and 78 transitions. Second operand has 22 states, 21 states have (on average 3.5238095238095237) internal successors, (74), 22 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:48,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:27:48,464 INFO L93 Difference]: Finished difference Result 77 states and 85 transitions. [2024-11-20 14:27:48,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-20 14:27:48,464 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.5238095238095237) internal successors, (74), 22 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2024-11-20 14:27:48,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:27:48,465 INFO L225 Difference]: With dead ends: 77 [2024-11-20 14:27:48,465 INFO L226 Difference]: Without dead ends: 77 [2024-11-20 14:27:48,465 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2024-11-20 14:27:48,466 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 22 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-20 14:27:48,466 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 318 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-20 14:27:48,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-11-20 14:27:48,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 70. [2024-11-20 14:27:48,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 66 states have (on average 1.196969696969697) internal successors, (79), 69 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:48,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 79 transitions. [2024-11-20 14:27:48,468 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 79 transitions. Word has length 29 [2024-11-20 14:27:48,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:27:48,468 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 79 transitions. [2024-11-20 14:27:48,468 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.5238095238095237) internal successors, (74), 22 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:48,469 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 79 transitions. [2024-11-20 14:27:48,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-20 14:27:48,469 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:27:48,469 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:27:48,479 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-20 14:27:48,672 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,SelfDestructingSolverStorable34 [2024-11-20 14:27:48,673 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-20 14:27:48,673 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:27:48,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1785552083, now seen corresponding path program 2 times [2024-11-20 14:27:48,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:27:48,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203597778] [2024-11-20 14:27:48,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:27:48,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:27:48,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:27:48,992 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:27:48,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:27:48,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203597778] [2024-11-20 14:27:48,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203597778] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:27:48,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028846982] [2024-11-20 14:27:48,993 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 14:27:48,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:27:48,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:27:48,995 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) [2024-11-20 14:27:48,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-20 14:27:49,098 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 14:27:49,099 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 14:27:49,101 INFO L255 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-20 14:27:49,103 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 14:27:49,110 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 [2024-11-20 14:27:49,149 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 [2024-11-20 14:27:49,457 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 14:27:49,457 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 20 treesize of output 17 [2024-11-20 14:27:49,560 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:27:49,560 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 14:27:50,009 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 [2024-11-20 14:27:50,018 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 [2024-11-20 14:27:50,122 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:27:50,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028846982] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 14:27:50,123 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 14:27:50,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 32 [2024-11-20 14:27:50,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643338709] [2024-11-20 14:27:50,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 14:27:50,123 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-20 14:27:50,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:27:50,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-20 14:27:50,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=892, Unknown=0, NotChecked=0, Total=992 [2024-11-20 14:27:50,125 INFO L87 Difference]: Start difference. First operand 70 states and 79 transitions. Second operand has 32 states, 32 states have (on average 2.5625) internal successors, (82), 32 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:50,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:27:50,757 INFO L93 Difference]: Finished difference Result 129 states and 143 transitions. [2024-11-20 14:27:50,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-20 14:27:50,758 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.5625) internal successors, (82), 32 states have internal predecessors, (82), 0 states have call successors, (0), 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 [2024-11-20 14:27:50,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:27:50,758 INFO L225 Difference]: With dead ends: 129 [2024-11-20 14:27:50,758 INFO L226 Difference]: Without dead ends: 111 [2024-11-20 14:27:50,759 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=179, Invalid=1543, Unknown=0, NotChecked=0, Total=1722 [2024-11-20 14:27:50,759 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 68 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-20 14:27:50,760 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 450 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 497 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-20 14:27:50,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2024-11-20 14:27:50,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 102. [2024-11-20 14:27:50,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 98 states have (on average 1.163265306122449) internal successors, (114), 101 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) [2024-11-20 14:27:50,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 114 transitions. [2024-11-20 14:27:50,763 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 114 transitions. Word has length 30 [2024-11-20 14:27:50,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:27:50,763 INFO L471 AbstractCegarLoop]: Abstraction has 102 states and 114 transitions. [2024-11-20 14:27:50,764 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.5625) internal successors, (82), 32 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:50,764 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 114 transitions. [2024-11-20 14:27:50,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-20 14:27:50,764 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:27:50,764 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:27:50,773 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-20 14:27:50,968 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,SelfDestructingSolverStorable35 [2024-11-20 14:27:50,969 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-20 14:27:50,969 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:27:50,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1751636202, now seen corresponding path program 1 times [2024-11-20 14:27:50,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:27:50,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429496274] [2024-11-20 14:27:50,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:27:50,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:27:50,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:27:51,199 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 14:27:51,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:27:51,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429496274] [2024-11-20 14:27:51,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429496274] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:27:51,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556272761] [2024-11-20 14:27:51,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:27:51,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:27:51,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:27:51,203 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) [2024-11-20 14:27:51,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-20 14:27:51,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:27:51,303 INFO L255 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-20 14:27:51,305 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 14:27:51,396 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 14:27:51,396 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 14:27:51,530 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 [2024-11-20 14:27:51,554 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 14:27:51,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556272761] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 14:27:51,556 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 14:27:51,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2024-11-20 14:27:51,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209858853] [2024-11-20 14:27:51,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 14:27:51,557 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-20 14:27:51,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:27:51,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-20 14:27:51,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2024-11-20 14:27:51,558 INFO L87 Difference]: Start difference. First operand 102 states and 114 transitions. Second operand has 21 states, 20 states have (on average 3.2) internal successors, (64), 21 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) [2024-11-20 14:27:51,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:27:51,772 INFO L93 Difference]: Finished difference Result 112 states and 122 transitions. [2024-11-20 14:27:51,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-20 14:27:51,773 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.2) internal successors, (64), 21 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 30 [2024-11-20 14:27:51,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:27:51,774 INFO L225 Difference]: With dead ends: 112 [2024-11-20 14:27:51,774 INFO L226 Difference]: Without dead ends: 109 [2024-11-20 14:27:51,774 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2024-11-20 14:27:51,775 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 31 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-20 14:27:51,775 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 353 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-20 14:27:51,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2024-11-20 14:27:51,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 100. [2024-11-20 14:27:51,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 96 states have (on average 1.1458333333333333) internal successors, (110), 99 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) [2024-11-20 14:27:51,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 110 transitions. [2024-11-20 14:27:51,777 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 110 transitions. Word has length 30 [2024-11-20 14:27:51,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:27:51,777 INFO L471 AbstractCegarLoop]: Abstraction has 100 states and 110 transitions. [2024-11-20 14:27:51,777 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.2) internal successors, (64), 21 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) [2024-11-20 14:27:51,778 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 110 transitions. [2024-11-20 14:27:51,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-20 14:27:51,778 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:27:51,778 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:27:51,789 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-20 14:27:51,978 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,SelfDestructingSolverStorable36 [2024-11-20 14:27:51,979 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-20 14:27:51,979 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:27:51,979 INFO L85 PathProgramCache]: Analyzing trace with hash -844665861, now seen corresponding path program 2 times [2024-11-20 14:27:51,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:27:51,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795526315] [2024-11-20 14:27:51,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:27:51,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:27:51,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:27:52,135 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 14:27:52,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:27:52,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795526315] [2024-11-20 14:27:52,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795526315] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:27:52,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181039932] [2024-11-20 14:27:52,136 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 14:27:52,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:27:52,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:27:52,139 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) [2024-11-20 14:27:52,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-20 14:27:52,259 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 14:27:52,259 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 14:27:52,261 INFO L255 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-20 14:27:52,264 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 14:27:52,306 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 [2024-11-20 14:27:52,616 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 14:27:52,616 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 20 treesize of output 17 [2024-11-20 14:27:52,735 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 14:27:52,736 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 14:27:53,121 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 [2024-11-20 14:27:53,127 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 [2024-11-20 14:27:53,132 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 [2024-11-20 14:27:53,164 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 14:27:53,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181039932] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 14:27:53,165 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 14:27:53,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 27 [2024-11-20 14:27:53,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603059014] [2024-11-20 14:27:53,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 14:27:53,165 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-20 14:27:53,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:27:53,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-20 14:27:53,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2024-11-20 14:27:53,166 INFO L87 Difference]: Start difference. First operand 100 states and 110 transitions. Second operand has 27 states, 27 states have (on average 2.962962962962963) internal successors, (80), 27 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:53,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:27:53,809 INFO L93 Difference]: Finished difference Result 149 states and 161 transitions. [2024-11-20 14:27:53,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-20 14:27:53,809 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.962962962962963) internal successors, (80), 27 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2024-11-20 14:27:53,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:27:53,810 INFO L225 Difference]: With dead ends: 149 [2024-11-20 14:27:53,810 INFO L226 Difference]: Without dead ends: 136 [2024-11-20 14:27:53,810 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=134, Invalid=1272, Unknown=0, NotChecked=0, Total=1406 [2024-11-20 14:27:53,811 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 25 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 809 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 470 SdHoareTripleChecker+Invalid, 811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-20 14:27:53,811 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 470 Invalid, 811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 809 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-20 14:27:53,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2024-11-20 14:27:53,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 124. [2024-11-20 14:27:53,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 120 states have (on average 1.1333333333333333) internal successors, (136), 123 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:53,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 136 transitions. [2024-11-20 14:27:53,813 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 136 transitions. Word has length 34 [2024-11-20 14:27:53,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:27:53,813 INFO L471 AbstractCegarLoop]: Abstraction has 124 states and 136 transitions. [2024-11-20 14:27:53,814 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.962962962962963) internal successors, (80), 27 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:53,814 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 136 transitions. [2024-11-20 14:27:53,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-20 14:27:53,814 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:27:53,814 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:27:53,822 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-20 14:27:54,014 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-11-20 14:27:54,015 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-20 14:27:54,015 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:27:54,015 INFO L85 PathProgramCache]: Analyzing trace with hash -975596923, now seen corresponding path program 3 times [2024-11-20 14:27:54,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:27:54,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967378847] [2024-11-20 14:27:54,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:27:54,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:27:54,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:27:54,356 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:27:54,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:27:54,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967378847] [2024-11-20 14:27:54,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967378847] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:27:54,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352311826] [2024-11-20 14:27:54,356 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-20 14:27:54,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:27:54,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:27:54,359 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) [2024-11-20 14:27:54,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-20 14:27:54,474 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-20 14:27:54,474 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 14:27:54,476 INFO L255 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-11-20 14:27:54,480 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 14:27:54,581 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 [2024-11-20 14:27:54,638 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:27:54,638 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 14:27:54,669 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 [2024-11-20 14:27:54,670 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 [2024-11-20 14:27:54,739 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:27:54,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352311826] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 14:27:54,740 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 14:27:54,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 23 [2024-11-20 14:27:54,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453151539] [2024-11-20 14:27:54,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 14:27:54,741 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-20 14:27:54,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:27:54,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-20 14:27:54,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2024-11-20 14:27:54,742 INFO L87 Difference]: Start difference. First operand 124 states and 136 transitions. Second operand has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:54,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:27:54,915 INFO L93 Difference]: Finished difference Result 210 states and 230 transitions. [2024-11-20 14:27:54,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-20 14:27:54,915 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2024-11-20 14:27:54,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:27:54,916 INFO L225 Difference]: With dead ends: 210 [2024-11-20 14:27:54,916 INFO L226 Difference]: Without dead ends: 189 [2024-11-20 14:27:54,916 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2024-11-20 14:27:54,917 INFO L432 NwaCegarLoop]: 51 mSDtfsCounter, 38 mSDsluCounter, 576 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 627 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-20 14:27:54,917 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 627 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-20 14:27:54,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2024-11-20 14:27:54,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 182. [2024-11-20 14:27:54,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 178 states have (on average 1.1235955056179776) internal successors, (200), 181 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:54,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 200 transitions. [2024-11-20 14:27:54,920 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 200 transitions. Word has length 37 [2024-11-20 14:27:54,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:27:54,920 INFO L471 AbstractCegarLoop]: Abstraction has 182 states and 200 transitions. [2024-11-20 14:27:54,921 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:54,921 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 200 transitions. [2024-11-20 14:27:54,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-20 14:27:54,921 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:27:54,922 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:27:54,930 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-20 14:27:55,122 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-11-20 14:27:55,122 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-20 14:27:55,123 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:27:55,123 INFO L85 PathProgramCache]: Analyzing trace with hash -392372617, now seen corresponding path program 2 times [2024-11-20 14:27:55,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:27:55,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970529601] [2024-11-20 14:27:55,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:27:55,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:27:55,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:27:55,381 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 14:27:55,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:27:55,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970529601] [2024-11-20 14:27:55,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970529601] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:27:55,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374019497] [2024-11-20 14:27:55,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 14:27:55,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:27:55,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:27:55,385 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) [2024-11-20 14:27:55,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-20 14:27:55,506 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 14:27:55,506 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 14:27:55,508 INFO L255 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-20 14:27:55,510 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 14:27:55,635 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 14:27:55,636 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 14:27:55,809 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 [2024-11-20 14:27:55,849 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 14:27:55,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374019497] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 14:27:55,850 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 14:27:55,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 23 [2024-11-20 14:27:55,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054103446] [2024-11-20 14:27:55,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 14:27:55,850 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-20 14:27:55,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:27:55,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-20 14:27:55,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2024-11-20 14:27:55,851 INFO L87 Difference]: Start difference. First operand 182 states and 200 transitions. Second operand has 24 states, 23 states have (on average 3.5652173913043477) internal successors, (82), 24 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:56,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:27:56,145 INFO L93 Difference]: Finished difference Result 195 states and 212 transitions. [2024-11-20 14:27:56,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-20 14:27:56,146 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.5652173913043477) internal successors, (82), 24 states have internal predecessors, (82), 0 states have call successors, (0), 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 39 [2024-11-20 14:27:56,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:27:56,146 INFO L225 Difference]: With dead ends: 195 [2024-11-20 14:27:56,147 INFO L226 Difference]: Without dead ends: 195 [2024-11-20 14:27:56,147 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 62 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2024-11-20 14:27:56,147 INFO L432 NwaCegarLoop]: 45 mSDtfsCounter, 24 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 617 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-20 14:27:56,147 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 617 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 555 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-20 14:27:56,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2024-11-20 14:27:56,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 186. [2024-11-20 14:27:56,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 182 states have (on average 1.1153846153846154) internal successors, (203), 185 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) [2024-11-20 14:27:56,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 203 transitions. [2024-11-20 14:27:56,150 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 203 transitions. Word has length 39 [2024-11-20 14:27:56,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:27:56,151 INFO L471 AbstractCegarLoop]: Abstraction has 186 states and 203 transitions. [2024-11-20 14:27:56,151 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.5652173913043477) internal successors, (82), 24 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:56,151 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 203 transitions. [2024-11-20 14:27:56,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-20 14:27:56,151 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:27:56,151 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:27:56,160 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-20 14:27:56,355 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,SelfDestructingSolverStorable39 [2024-11-20 14:27:56,356 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-20 14:27:56,356 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:27:56,356 INFO L85 PathProgramCache]: Analyzing trace with hash -354360394, now seen corresponding path program 1 times [2024-11-20 14:27:56,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:27:56,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116518688] [2024-11-20 14:27:56,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:27:56,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:27:56,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:27:56,639 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 14:27:56,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:27:56,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116518688] [2024-11-20 14:27:56,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116518688] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:27:56,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28032353] [2024-11-20 14:27:56,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:27:56,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:27:56,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:27:56,643 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) [2024-11-20 14:27:56,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-20 14:27:56,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:27:56,758 INFO L255 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-20 14:27:56,760 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 14:27:56,765 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 [2024-11-20 14:27:56,916 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 14:27:56,917 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 14:27:57,207 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 14:27:57,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28032353] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 14:27:57,208 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 14:27:57,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2024-11-20 14:27:57,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522770330] [2024-11-20 14:27:57,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 14:27:57,209 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-20 14:27:57,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:27:57,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-20 14:27:57,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2024-11-20 14:27:57,212 INFO L87 Difference]: Start difference. First operand 186 states and 203 transitions. Second operand has 26 states, 25 states have (on average 4.0) internal successors, (100), 26 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) [2024-11-20 14:27:57,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:27:57,480 INFO L93 Difference]: Finished difference Result 199 states and 216 transitions. [2024-11-20 14:27:57,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-20 14:27:57,481 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 4.0) internal successors, (100), 26 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 40 [2024-11-20 14:27:57,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:27:57,482 INFO L225 Difference]: With dead ends: 199 [2024-11-20 14:27:57,482 INFO L226 Difference]: Without dead ends: 176 [2024-11-20 14:27:57,482 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=113, Invalid=757, Unknown=0, NotChecked=0, Total=870 [2024-11-20 14:27:57,483 INFO L432 NwaCegarLoop]: 46 mSDtfsCounter, 38 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-20 14:27:57,483 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 494 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-20 14:27:57,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2024-11-20 14:27:57,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 171. [2024-11-20 14:27:57,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 167 states have (on average 1.1137724550898203) internal successors, (186), 170 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:27:57,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 186 transitions. [2024-11-20 14:27:57,486 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 186 transitions. Word has length 40 [2024-11-20 14:27:57,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:27:57,486 INFO L471 AbstractCegarLoop]: Abstraction has 171 states and 186 transitions. [2024-11-20 14:27:57,487 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 4.0) internal successors, (100), 26 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) [2024-11-20 14:27:57,487 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 186 transitions. [2024-11-20 14:27:57,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-20 14:27:57,487 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:27:57,487 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:27:57,496 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-20 14:27:57,691 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:27:57,692 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-20 14:27:57,692 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:27:57,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1190776, now seen corresponding path program 4 times [2024-11-20 14:27:57,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:27:57,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318330181] [2024-11-20 14:27:57,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:27:57,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:27:57,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:27:58,030 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:27:58,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:27:58,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318330181] [2024-11-20 14:27:58,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318330181] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:27:58,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633532213] [2024-11-20 14:27:58,030 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-20 14:27:58,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:27:58,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:27:58,032 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) [2024-11-20 14:27:58,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-20 14:27:58,132 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-20 14:27:58,132 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 14:27:58,133 INFO L255 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-11-20 14:27:58,135 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 14:27:58,172 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 [2024-11-20 14:27:58,707 INFO L349 Elim1Store]: treesize reduction 8, result has 75.8 percent of original size [2024-11-20 14:27:58,707 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 40 treesize of output 39 [2024-11-20 14:27:58,779 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-20 14:27:58,779 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 14:27:59,408 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 38 [2024-11-20 14:27:59,416 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 68 treesize of output 58 [2024-11-20 14:27:59,422 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 [2024-11-20 14:27:59,460 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-20 14:27:59,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633532213] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 14:27:59,461 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 14:27:59,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 14] total 35 [2024-11-20 14:27:59,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342908153] [2024-11-20 14:27:59,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 14:27:59,462 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-20 14:27:59,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:27:59,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-20 14:27:59,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1097, Unknown=0, NotChecked=0, Total=1260 [2024-11-20 14:27:59,463 INFO L87 Difference]: Start difference. First operand 171 states and 186 transitions. Second operand has 36 states, 35 states have (on average 2.5428571428571427) internal successors, (89), 36 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:28:00,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:28:00,530 INFO L93 Difference]: Finished difference Result 192 states and 208 transitions. [2024-11-20 14:28:00,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-20 14:28:00,531 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.5428571428571427) internal successors, (89), 36 states have internal predecessors, (89), 0 states have call successors, (0), 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 41 [2024-11-20 14:28:00,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:28:00,531 INFO L225 Difference]: With dead ends: 192 [2024-11-20 14:28:00,532 INFO L226 Difference]: Without dead ends: 154 [2024-11-20 14:28:00,532 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=368, Invalid=2602, Unknown=0, NotChecked=0, Total=2970 [2024-11-20 14:28:00,533 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 93 mSDsluCounter, 710 mSDsCounter, 0 mSdLazyCounter, 919 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 758 SdHoareTripleChecker+Invalid, 929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-20 14:28:00,533 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 758 Invalid, 929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 919 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-20 14:28:00,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2024-11-20 14:28:00,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 153. [2024-11-20 14:28:00,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 149 states have (on average 1.1140939597315436) internal successors, (166), 152 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:28:00,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 166 transitions. [2024-11-20 14:28:00,536 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 166 transitions. Word has length 41 [2024-11-20 14:28:00,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:28:00,536 INFO L471 AbstractCegarLoop]: Abstraction has 153 states and 166 transitions. [2024-11-20 14:28:00,536 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.5428571428571427) internal successors, (89), 36 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:28:00,536 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 166 transitions. [2024-11-20 14:28:00,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-20 14:28:00,537 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:28:00,537 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:28:00,546 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-20 14:28:00,737 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:28:00,738 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-20 14:28:00,738 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:28:00,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1689236335, now seen corresponding path program 1 times [2024-11-20 14:28:00,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:28:00,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534078133] [2024-11-20 14:28:00,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:28:00,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:28:00,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:28:01,136 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-20 14:28:01,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:28:01,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534078133] [2024-11-20 14:28:01,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534078133] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:28:01,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823285143] [2024-11-20 14:28:01,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:28:01,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:28:01,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:28:01,139 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) [2024-11-20 14:28:01,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-20 14:28:01,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:28:01,252 INFO L255 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-20 14:28:01,253 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 14:28:01,321 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 [2024-11-20 14:28:01,354 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-20 14:28:01,354 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 14:28:01,375 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 [2024-11-20 14:28:01,377 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 [2024-11-20 14:28:01,433 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-20 14:28:01,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823285143] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 14:28:01,433 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 14:28:01,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 20 [2024-11-20 14:28:01,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127477750] [2024-11-20 14:28:01,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 14:28:01,434 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-20 14:28:01,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:28:01,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-20 14:28:01,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2024-11-20 14:28:01,435 INFO L87 Difference]: Start difference. First operand 153 states and 166 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:28:01,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:28:01,559 INFO L93 Difference]: Finished difference Result 148 states and 159 transitions. [2024-11-20 14:28:01,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-20 14:28:01,559 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2024-11-20 14:28:01,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:28:01,560 INFO L225 Difference]: With dead ends: 148 [2024-11-20 14:28:01,560 INFO L226 Difference]: Without dead ends: 123 [2024-11-20 14:28:01,560 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2024-11-20 14:28:01,561 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 8 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-20 14:28:01,561 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 379 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-20 14:28:01,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2024-11-20 14:28:01,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2024-11-20 14:28:01,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 119 states have (on average 1.1176470588235294) internal successors, (133), 122 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:28:01,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 133 transitions. [2024-11-20 14:28:01,563 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 133 transitions. Word has length 42 [2024-11-20 14:28:01,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:28:01,564 INFO L471 AbstractCegarLoop]: Abstraction has 123 states and 133 transitions. [2024-11-20 14:28:01,564 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:28:01,564 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 133 transitions. [2024-11-20 14:28:01,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-20 14:28:01,564 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:28:01,564 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:28:01,572 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-20 14:28:01,766 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:28:01,767 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-20 14:28:01,767 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:28:01,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1505802293, now seen corresponding path program 3 times [2024-11-20 14:28:01,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:28:01,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732814096] [2024-11-20 14:28:01,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:28:01,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:28:01,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:28:01,953 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-20 14:28:01,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:28:01,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732814096] [2024-11-20 14:28:01,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732814096] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:28:01,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060884824] [2024-11-20 14:28:01,954 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-20 14:28:01,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:28:01,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:28:01,956 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) [2024-11-20 14:28:01,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-20 14:28:02,287 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-20 14:28:02,287 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 14:28:02,289 INFO L255 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 63 conjuncts are in the unsatisfiable core [2024-11-20 14:28:02,291 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 14:28:02,443 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 [2024-11-20 14:28:02,568 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 9 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:28:02,568 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 14:28:02,614 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 [2024-11-20 14:28:02,615 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 [2024-11-20 14:28:02,730 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 14:28:02,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060884824] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 14:28:02,731 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 14:28:02,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 19, 15] total 33 [2024-11-20 14:28:02,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807095375] [2024-11-20 14:28:02,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 14:28:02,731 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-20 14:28:02,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:28:02,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-20 14:28:02,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=942, Unknown=0, NotChecked=0, Total=1056 [2024-11-20 14:28:02,732 INFO L87 Difference]: Start difference. First operand 123 states and 133 transitions. Second operand has 33 states, 33 states have (on average 3.1515151515151514) internal successors, (104), 33 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:28:03,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:28:03,189 INFO L93 Difference]: Finished difference Result 176 states and 186 transitions. [2024-11-20 14:28:03,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-11-20 14:28:03,189 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.1515151515151514) internal successors, (104), 33 states have internal predecessors, (104), 0 states have call successors, (0), 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 47 [2024-11-20 14:28:03,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:28:03,190 INFO L225 Difference]: With dead ends: 176 [2024-11-20 14:28:03,190 INFO L226 Difference]: Without dead ends: 121 [2024-11-20 14:28:03,191 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=158, Invalid=1564, Unknown=0, NotChecked=0, Total=1722 [2024-11-20 14:28:03,191 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 26 mSDsluCounter, 607 mSDsCounter, 0 mSdLazyCounter, 909 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 634 SdHoareTripleChecker+Invalid, 915 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 909 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-20 14:28:03,191 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 634 Invalid, 915 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 909 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-20 14:28:03,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2024-11-20 14:28:03,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 115. [2024-11-20 14:28:03,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 111 states have (on average 1.117117117117117) internal successors, (124), 114 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) [2024-11-20 14:28:03,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 124 transitions. [2024-11-20 14:28:03,194 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 124 transitions. Word has length 47 [2024-11-20 14:28:03,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:28:03,194 INFO L471 AbstractCegarLoop]: Abstraction has 115 states and 124 transitions. [2024-11-20 14:28:03,194 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.1515151515151514) internal successors, (104), 33 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:28:03,194 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 124 transitions. [2024-11-20 14:28:03,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-20 14:28:03,195 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:28:03,195 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:28:03,204 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-20 14:28:03,395 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:28:03,395 INFO L396 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-20 14:28:03,396 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:28:03,396 INFO L85 PathProgramCache]: Analyzing trace with hash 691653491, now seen corresponding path program 2 times [2024-11-20 14:28:03,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:28:03,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9558396] [2024-11-20 14:28:03,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:28:03,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:28:03,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:28:03,777 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 14:28:03,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:28:03,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9558396] [2024-11-20 14:28:03,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9558396] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:28:03,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880515657] [2024-11-20 14:28:03,778 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 14:28:03,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:28:03,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:28:03,781 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) [2024-11-20 14:28:03,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-20 14:28:03,918 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 14:28:03,918 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 14:28:03,919 INFO L255 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 56 conjuncts are in the unsatisfiable core [2024-11-20 14:28:03,921 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 14:28:04,035 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 [2024-11-20 14:28:04,109 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 14:28:04,110 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 14:28:04,147 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 [2024-11-20 14:28:04,150 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 [2024-11-20 14:28:04,226 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 14:28:04,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880515657] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 14:28:04,227 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 14:28:04,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 26 [2024-11-20 14:28:04,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786393431] [2024-11-20 14:28:04,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 14:28:04,227 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-20 14:28:04,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:28:04,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-20 14:28:04,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2024-11-20 14:28:04,228 INFO L87 Difference]: Start difference. First operand 115 states and 124 transitions. Second operand has 26 states, 26 states have (on average 3.1923076923076925) internal successors, (83), 26 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:28:04,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:28:04,516 INFO L93 Difference]: Finished difference Result 206 states and 221 transitions. [2024-11-20 14:28:04,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-20 14:28:04,517 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.1923076923076925) internal successors, (83), 26 states have internal predecessors, (83), 0 states have call successors, (0), 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 [2024-11-20 14:28:04,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:28:04,518 INFO L225 Difference]: With dead ends: 206 [2024-11-20 14:28:04,518 INFO L226 Difference]: Without dead ends: 162 [2024-11-20 14:28:04,518 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2024-11-20 14:28:04,518 INFO L432 NwaCegarLoop]: 45 mSDtfsCounter, 35 mSDsluCounter, 676 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 721 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-20 14:28:04,518 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 721 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 457 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-20 14:28:04,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2024-11-20 14:28:04,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 158. [2024-11-20 14:28:04,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 154 states have (on average 1.103896103896104) internal successors, (170), 157 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:28:04,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 170 transitions. [2024-11-20 14:28:04,524 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 170 transitions. Word has length 50 [2024-11-20 14:28:04,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:28:04,524 INFO L471 AbstractCegarLoop]: Abstraction has 158 states and 170 transitions. [2024-11-20 14:28:04,527 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.1923076923076925) internal successors, (83), 26 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:28:04,528 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 170 transitions. [2024-11-20 14:28:04,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-20 14:28:04,528 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:28:04,528 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:28:04,536 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-20 14:28:04,729 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:28:04,729 INFO L396 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-20 14:28:04,729 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:28:04,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1599870288, now seen corresponding path program 3 times [2024-11-20 14:28:04,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:28:04,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3022739] [2024-11-20 14:28:04,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:28:04,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:28:04,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:28:05,204 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 14:28:05,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:28:05,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3022739] [2024-11-20 14:28:05,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3022739] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:28:05,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870534303] [2024-11-20 14:28:05,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-20 14:28:05,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:28:05,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:28:05,207 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) [2024-11-20 14:28:05,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-20 14:28:05,360 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-20 14:28:05,361 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 14:28:05,364 INFO L255 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 80 conjuncts are in the unsatisfiable core [2024-11-20 14:28:05,366 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 14:28:05,372 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 7 [2024-11-20 14:28:05,379 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 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 [2024-11-20 14:28:05,711 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2024-11-20 14:28:06,178 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 14:28:06,178 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 24 treesize of output 21 [2024-11-20 14:28:06,295 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 21 proven. 14 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-20 14:28:06,295 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 14:28:06,525 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 17 treesize of output 15 [2024-11-20 14:28:06,528 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 26 treesize of output 20 [2024-11-20 14:28:06,915 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-20 14:28:06,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870534303] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 14:28:06,915 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 14:28:06,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 19, 15] total 45 [2024-11-20 14:28:06,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829279959] [2024-11-20 14:28:06,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 14:28:06,916 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-11-20 14:28:06,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:28:06,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-11-20 14:28:06,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=1814, Unknown=0, NotChecked=0, Total=2070 [2024-11-20 14:28:06,917 INFO L87 Difference]: Start difference. First operand 158 states and 170 transitions. Second operand has 46 states, 45 states have (on average 3.066666666666667) internal successors, (138), 46 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:28:08,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:28:08,763 INFO L93 Difference]: Finished difference Result 192 states and 204 transitions. [2024-11-20 14:28:08,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2024-11-20 14:28:08,763 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 3.066666666666667) internal successors, (138), 46 states have internal predecessors, (138), 0 states have call successors, (0), 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 [2024-11-20 14:28:08,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:28:08,764 INFO L225 Difference]: With dead ends: 192 [2024-11-20 14:28:08,764 INFO L226 Difference]: Without dead ends: 126 [2024-11-20 14:28:08,766 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1814 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=803, Invalid=6507, Unknown=0, NotChecked=0, Total=7310 [2024-11-20 14:28:08,766 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 127 mSDsluCounter, 784 mSDsCounter, 0 mSdLazyCounter, 1406 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 823 SdHoareTripleChecker+Invalid, 1421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-20 14:28:08,767 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 823 Invalid, 1421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1406 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-20 14:28:08,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2024-11-20 14:28:08,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 113. [2024-11-20 14:28:08,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 109 states have (on average 1.110091743119266) internal successors, (121), 112 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:28:08,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 121 transitions. [2024-11-20 14:28:08,769 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 121 transitions. Word has length 54 [2024-11-20 14:28:08,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:28:08,769 INFO L471 AbstractCegarLoop]: Abstraction has 113 states and 121 transitions. [2024-11-20 14:28:08,770 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 3.066666666666667) internal successors, (138), 46 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:28:08,770 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 121 transitions. [2024-11-20 14:28:08,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-20 14:28:08,770 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:28:08,770 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:28:08,778 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-11-20 14:28:08,974 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:28:08,974 INFO L396 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-20 14:28:08,975 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:28:08,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1485228015, now seen corresponding path program 4 times [2024-11-20 14:28:08,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:28:08,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801947648] [2024-11-20 14:28:08,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:28:08,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:28:08,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:28:09,409 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 38 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-20 14:28:09,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:28:09,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801947648] [2024-11-20 14:28:09,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801947648] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:28:09,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354279991] [2024-11-20 14:28:09,410 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-20 14:28:09,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:28:09,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:28:09,412 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) [2024-11-20 14:28:09,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-20 14:28:09,630 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-20 14:28:09,630 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 14:28:09,633 INFO L255 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-11-20 14:28:09,635 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 14:28:09,640 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 [2024-11-20 14:28:09,864 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-20 14:28:09,865 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 14:28:10,225 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-20 14:28:10,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354279991] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 14:28:10,225 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 14:28:10,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 28 [2024-11-20 14:28:10,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786603759] [2024-11-20 14:28:10,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 14:28:10,226 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-20 14:28:10,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:28:10,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-20 14:28:10,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=694, Unknown=0, NotChecked=0, Total=812 [2024-11-20 14:28:10,227 INFO L87 Difference]: Start difference. First operand 113 states and 121 transitions. Second operand has 29 states, 28 states have (on average 4.214285714285714) internal successors, (118), 29 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:28:10,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:28:10,490 INFO L93 Difference]: Finished difference Result 121 states and 128 transitions. [2024-11-20 14:28:10,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-20 14:28:10,490 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 4.214285714285714) internal successors, (118), 29 states have internal predecessors, (118), 0 states have call successors, (0), 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 55 [2024-11-20 14:28:10,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:28:10,491 INFO L225 Difference]: With dead ends: 121 [2024-11-20 14:28:10,491 INFO L226 Difference]: Without dead ends: 121 [2024-11-20 14:28:10,491 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=150, Invalid=906, Unknown=0, NotChecked=0, Total=1056 [2024-11-20 14:28:10,491 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 11 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-20 14:28:10,491 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 345 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 479 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-20 14:28:10,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2024-11-20 14:28:10,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 117. [2024-11-20 14:28:10,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 113 states have (on average 1.1061946902654867) internal successors, (125), 116 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:28:10,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 125 transitions. [2024-11-20 14:28:10,494 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 125 transitions. Word has length 55 [2024-11-20 14:28:10,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:28:10,495 INFO L471 AbstractCegarLoop]: Abstraction has 117 states and 125 transitions. [2024-11-20 14:28:10,495 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 4.214285714285714) internal successors, (118), 29 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:28:10,495 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 125 transitions. [2024-11-20 14:28:10,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-11-20 14:28:10,495 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:28:10,495 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:28:10,504 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-20 14:28:10,696 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,SelfDestructingSolverStorable46 [2024-11-20 14:28:10,696 INFO L396 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-20 14:28:10,696 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:28:10,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1202571806, now seen corresponding path program 3 times [2024-11-20 14:28:10,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:28:10,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457867639] [2024-11-20 14:28:10,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:28:10,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:28:10,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:28:11,064 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 1 proven. 41 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-20 14:28:11,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:28:11,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457867639] [2024-11-20 14:28:11,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457867639] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:28:11,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449857565] [2024-11-20 14:28:11,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-20 14:28:11,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:28:11,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:28:11,067 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) [2024-11-20 14:28:11,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-20 14:28:11,256 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-20 14:28:11,257 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 14:28:11,260 INFO L255 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 79 conjuncts are in the unsatisfiable core [2024-11-20 14:28:11,263 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 14:28:11,271 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 [2024-11-20 14:28:11,277 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 [2024-11-20 14:28:11,751 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-20 14:28:11,751 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 14:28:12,332 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-20 14:28:12,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449857565] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 14:28:12,333 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 14:28:12,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 38 [2024-11-20 14:28:12,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380015541] [2024-11-20 14:28:12,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 14:28:12,333 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-20 14:28:12,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:28:12,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-20 14:28:12,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1324, Unknown=0, NotChecked=0, Total=1482 [2024-11-20 14:28:12,335 INFO L87 Difference]: Start difference. First operand 117 states and 125 transitions. Second operand has 39 states, 38 states have (on average 3.5789473684210527) internal successors, (136), 39 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:28:12,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:28:12,841 INFO L93 Difference]: Finished difference Result 121 states and 127 transitions. [2024-11-20 14:28:12,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-20 14:28:12,841 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 3.5789473684210527) internal successors, (136), 39 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2024-11-20 14:28:12,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:28:12,842 INFO L225 Difference]: With dead ends: 121 [2024-11-20 14:28:12,842 INFO L226 Difference]: Without dead ends: 118 [2024-11-20 14:28:12,843 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=314, Invalid=2656, Unknown=0, NotChecked=0, Total=2970 [2024-11-20 14:28:12,843 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 22 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-20 14:28:12,843 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 440 Invalid, 542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 537 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-20 14:28:12,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2024-11-20 14:28:12,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2024-11-20 14:28:12,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 114 states have (on average 1.0789473684210527) internal successors, (123), 117 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:28:12,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 123 transitions. [2024-11-20 14:28:12,848 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 123 transitions. Word has length 56 [2024-11-20 14:28:12,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:28:12,848 INFO L471 AbstractCegarLoop]: Abstraction has 118 states and 123 transitions. [2024-11-20 14:28:12,848 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 3.5789473684210527) internal successors, (136), 39 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:28:12,849 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 123 transitions. [2024-11-20 14:28:12,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-11-20 14:28:12,849 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:28:12,849 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:28:12,857 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-11-20 14:28:13,049 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,SelfDestructingSolverStorable47 [2024-11-20 14:28:13,050 INFO L396 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-20 14:28:13,050 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:28:13,050 INFO L85 PathProgramCache]: Analyzing trace with hash -915823825, now seen corresponding path program 5 times [2024-11-20 14:28:13,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:28:13,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598428887] [2024-11-20 14:28:13,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:28:13,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:28:13,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:28:13,293 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 20 proven. 36 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-20 14:28:13,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:28:13,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598428887] [2024-11-20 14:28:13,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598428887] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:28:13,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330540144] [2024-11-20 14:28:13,294 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-20 14:28:13,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:28:13,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:28:13,296 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) [2024-11-20 14:28:13,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-20 14:28:13,628 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-20 14:28:13,628 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 14:28:13,630 INFO L255 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 56 conjuncts are in the unsatisfiable core [2024-11-20 14:28:13,632 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 14:28:13,727 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 [2024-11-20 14:28:13,852 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 45 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-20 14:28:13,852 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 14:28:13,888 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 [2024-11-20 14:28:13,890 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 [2024-11-20 14:28:13,963 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 45 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-20 14:28:13,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330540144] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 14:28:13,964 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 14:28:13,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 28 [2024-11-20 14:28:13,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651635446] [2024-11-20 14:28:13,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 14:28:13,964 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-20 14:28:13,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:28:13,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-20 14:28:13,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=694, Unknown=0, NotChecked=0, Total=756 [2024-11-20 14:28:13,965 INFO L87 Difference]: Start difference. First operand 118 states and 123 transitions. Second operand has 28 states, 28 states have (on average 3.642857142857143) internal successors, (102), 28 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:28:14,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:28:14,527 INFO L93 Difference]: Finished difference Result 180 states and 184 transitions. [2024-11-20 14:28:14,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-11-20 14:28:14,528 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.642857142857143) internal successors, (102), 28 states have internal predecessors, (102), 0 states have call successors, (0), 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 [2024-11-20 14:28:14,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:28:14,528 INFO L225 Difference]: With dead ends: 180 [2024-11-20 14:28:14,528 INFO L226 Difference]: Without dead ends: 90 [2024-11-20 14:28:14,529 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=152, Invalid=1918, Unknown=0, NotChecked=0, Total=2070 [2024-11-20 14:28:14,529 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 21 mSDsluCounter, 581 mSDsCounter, 0 mSdLazyCounter, 972 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 609 SdHoareTripleChecker+Invalid, 975 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 972 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-20 14:28:14,529 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 609 Invalid, 975 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 972 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-20 14:28:14,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2024-11-20 14:28:14,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 84. [2024-11-20 14:28:14,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 80 states have (on average 1.0875) internal successors, (87), 83 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:28:14,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 87 transitions. [2024-11-20 14:28:14,531 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 87 transitions. Word has length 60 [2024-11-20 14:28:14,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:28:14,531 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 87 transitions. [2024-11-20 14:28:14,531 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.642857142857143) internal successors, (102), 28 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:28:14,531 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 87 transitions. [2024-11-20 14:28:14,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-11-20 14:28:14,532 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:28:14,532 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:28:14,542 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-20 14:28:14,732 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2024-11-20 14:28:14,733 INFO L396 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-20 14:28:14,733 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:28:14,733 INFO L85 PathProgramCache]: Analyzing trace with hash -830262103, now seen corresponding path program 6 times [2024-11-20 14:28:14,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:28:14,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379126197] [2024-11-20 14:28:14,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:28:14,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:28:14,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:28:15,283 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 6 proven. 64 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-20 14:28:15,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:28:15,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379126197] [2024-11-20 14:28:15,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379126197] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:28:15,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376963055] [2024-11-20 14:28:15,284 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-20 14:28:15,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:28:15,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:28:15,287 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 14:28:15,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-20 14:28:15,555 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-11-20 14:28:15,555 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 14:28:15,557 INFO L255 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-11-20 14:28:15,559 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 14:28:15,566 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 [2024-11-20 14:28:15,804 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 15 proven. 55 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-20 14:28:15,804 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 14:28:16,208 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 15 proven. 55 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-20 14:28:16,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376963055] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 14:28:16,208 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 14:28:16,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 40 [2024-11-20 14:28:16,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436820478] [2024-11-20 14:28:16,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 14:28:16,209 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-11-20 14:28:16,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:28:16,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-11-20 14:28:16,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1437, Unknown=0, NotChecked=0, Total=1640 [2024-11-20 14:28:16,210 INFO L87 Difference]: Start difference. First operand 84 states and 87 transitions. Second operand has 41 states, 40 states have (on average 4.0) internal successors, (160), 41 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:28:16,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:28:16,555 INFO L93 Difference]: Finished difference Result 86 states and 88 transitions. [2024-11-20 14:28:16,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-20 14:28:16,556 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 4.0) internal successors, (160), 41 states have internal predecessors, (160), 0 states have call successors, (0), 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 68 [2024-11-20 14:28:16,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:28:16,556 INFO L225 Difference]: With dead ends: 86 [2024-11-20 14:28:16,556 INFO L226 Difference]: Without dead ends: 86 [2024-11-20 14:28:16,557 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=267, Invalid=1803, Unknown=0, NotChecked=0, Total=2070 [2024-11-20 14:28:16,557 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 11 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-20 14:28:16,558 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 496 Invalid, 664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 664 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-20 14:28:16,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2024-11-20 14:28:16,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2024-11-20 14:28:16,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 81 states have (on average 1.0864197530864197) internal successors, (88), 84 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:28:16,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 88 transitions. [2024-11-20 14:28:16,559 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 88 transitions. Word has length 68 [2024-11-20 14:28:16,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:28:16,560 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 88 transitions. [2024-11-20 14:28:16,560 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 4.0) internal successors, (160), 41 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:28:16,560 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 88 transitions. [2024-11-20 14:28:16,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-11-20 14:28:16,561 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:28:16,561 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:28:16,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-11-20 14:28:16,761 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:28:16,761 INFO L396 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-20 14:28:16,762 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:28:16,762 INFO L85 PathProgramCache]: Analyzing trace with hash 31678598, now seen corresponding path program 4 times [2024-11-20 14:28:16,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:28:16,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576885093] [2024-11-20 14:28:16,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:28:16,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:28:16,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:28:17,232 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 6 proven. 68 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-20 14:28:17,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:28:17,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576885093] [2024-11-20 14:28:17,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576885093] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:28:17,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860353048] [2024-11-20 14:28:17,233 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-20 14:28:17,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:28:17,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:28:17,235 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 14:28:17,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-20 14:28:17,563 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-20 14:28:17,564 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 14:28:17,567 INFO L255 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-11-20 14:28:17,569 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 14:28:17,798 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 15 proven. 59 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-20 14:28:17,798 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 14:28:17,959 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 [2024-11-20 14:28:18,152 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 15 proven. 59 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-20 14:28:18,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860353048] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 14:28:18,152 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 14:28:18,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 36 [2024-11-20 14:28:18,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699776107] [2024-11-20 14:28:18,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 14:28:18,153 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-11-20 14:28:18,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:28:18,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-11-20 14:28:18,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1143, Unknown=0, NotChecked=0, Total=1332 [2024-11-20 14:28:18,154 INFO L87 Difference]: Start difference. First operand 85 states and 88 transitions. Second operand has 37 states, 36 states have (on average 3.9722222222222223) internal successors, (143), 37 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) [2024-11-20 14:28:18,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:28:18,403 INFO L93 Difference]: Finished difference Result 86 states and 88 transitions. [2024-11-20 14:28:18,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-20 14:28:18,403 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 3.9722222222222223) internal successors, (143), 37 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) Word has length 69 [2024-11-20 14:28:18,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:28:18,404 INFO L225 Difference]: With dead ends: 86 [2024-11-20 14:28:18,404 INFO L226 Difference]: Without dead ends: 83 [2024-11-20 14:28:18,404 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=237, Invalid=1485, Unknown=0, NotChecked=0, Total=1722 [2024-11-20 14:28:18,405 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 14 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-20 14:28:18,405 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 392 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 475 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-20 14:28:18,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2024-11-20 14:28:18,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2024-11-20 14:28:18,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 79 states have (on average 1.0759493670886076) internal successors, (85), 82 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:28:18,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 85 transitions. [2024-11-20 14:28:18,407 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 85 transitions. Word has length 69 [2024-11-20 14:28:18,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:28:18,407 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 85 transitions. [2024-11-20 14:28:18,407 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 3.9722222222222223) internal successors, (143), 37 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) [2024-11-20 14:28:18,407 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 85 transitions. [2024-11-20 14:28:18,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-11-20 14:28:18,407 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:28:18,407 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:28:18,417 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-11-20 14:28:18,612 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:28:18,613 INFO L396 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-20 14:28:18,613 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:28:18,613 INFO L85 PathProgramCache]: Analyzing trace with hash -1466055273, now seen corresponding path program 7 times [2024-11-20 14:28:18,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:28:18,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313636330] [2024-11-20 14:28:18,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:28:18,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:28:18,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:28:18,982 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 26 proven. 66 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-11-20 14:28:18,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:28:18,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313636330] [2024-11-20 14:28:18,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313636330] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:28:18,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584554531] [2024-11-20 14:28:18,982 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-20 14:28:18,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:28:18,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:28:18,985 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 14:28:18,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-20 14:28:19,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:28:19,183 INFO L255 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 66 conjuncts are in the unsatisfiable core [2024-11-20 14:28:19,186 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 14:28:19,318 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 [2024-11-20 14:28:19,493 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 15 proven. 78 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-20 14:28:19,493 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 14:28:19,538 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 [2024-11-20 14:28:19,539 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 [2024-11-20 14:28:19,646 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 15 proven. 78 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-20 14:28:19,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584554531] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 14:28:19,647 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 14:28:19,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 33 [2024-11-20 14:28:19,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888991516] [2024-11-20 14:28:19,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 14:28:19,647 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-20 14:28:19,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:28:19,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-20 14:28:19,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=984, Unknown=0, NotChecked=0, Total=1056 [2024-11-20 14:28:19,648 INFO L87 Difference]: Start difference. First operand 83 states and 85 transitions. Second operand has 33 states, 33 states have (on average 3.6363636363636362) internal successors, (120), 33 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) [2024-11-20 14:28:20,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:28:20,462 INFO L93 Difference]: Finished difference Result 206 states and 209 transitions. [2024-11-20 14:28:20,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2024-11-20 14:28:20,462 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.6363636363636362) internal successors, (120), 33 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 73 [2024-11-20 14:28:20,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:28:20,463 INFO L225 Difference]: With dead ends: 206 [2024-11-20 14:28:20,463 INFO L226 Difference]: Without dead ends: 97 [2024-11-20 14:28:20,463 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=186, Invalid=2894, Unknown=0, NotChecked=0, Total=3080 [2024-11-20 14:28:20,464 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 26 mSDsluCounter, 800 mSDsCounter, 0 mSdLazyCounter, 1419 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 832 SdHoareTripleChecker+Invalid, 1425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-20 14:28:20,464 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 832 Invalid, 1425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1419 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-20 14:28:20,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2024-11-20 14:28:20,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 91. [2024-11-20 14:28:20,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 87 states have (on average 1.0689655172413792) internal successors, (93), 90 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:28:20,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 93 transitions. [2024-11-20 14:28:20,466 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 93 transitions. Word has length 73 [2024-11-20 14:28:20,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:28:20,466 INFO L471 AbstractCegarLoop]: Abstraction has 91 states and 93 transitions. [2024-11-20 14:28:20,466 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.6363636363636362) internal successors, (120), 33 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) [2024-11-20 14:28:20,466 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 93 transitions. [2024-11-20 14:28:20,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-11-20 14:28:20,466 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:28:20,466 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:28:20,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-11-20 14:28:20,667 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2024-11-20 14:28:20,667 INFO L396 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-20 14:28:20,667 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:28:20,667 INFO L85 PathProgramCache]: Analyzing trace with hash 946702941, now seen corresponding path program 8 times [2024-11-20 14:28:20,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:28:20,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84352274] [2024-11-20 14:28:20,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:28:20,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:28:20,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:28:21,280 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 15 proven. 95 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-20 14:28:21,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:28:21,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84352274] [2024-11-20 14:28:21,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84352274] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:28:21,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778277245] [2024-11-20 14:28:21,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 14:28:21,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:28:21,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:28:21,282 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 14:28:21,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-20 14:28:21,454 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 14:28:21,454 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 14:28:21,457 INFO L255 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 64 conjuncts are in the unsatisfiable core [2024-11-20 14:28:21,460 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 14:28:21,468 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 [2024-11-20 14:28:21,741 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 28 proven. 82 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-20 14:28:21,742 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 14:28:22,218 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 28 proven. 82 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-20 14:28:22,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778277245] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 14:28:22,218 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 14:28:22,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 40 [2024-11-20 14:28:22,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993729794] [2024-11-20 14:28:22,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 14:28:22,219 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-11-20 14:28:22,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:28:22,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-11-20 14:28:22,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1449, Unknown=0, NotChecked=0, Total=1640 [2024-11-20 14:28:22,220 INFO L87 Difference]: Start difference. First operand 91 states and 93 transitions. Second operand has 41 states, 40 states have (on average 4.05) internal successors, (162), 41 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:28:22,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:28:22,680 INFO L93 Difference]: Finished difference Result 100 states and 103 transitions. [2024-11-20 14:28:22,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-20 14:28:22,681 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 4.05) internal successors, (162), 41 states have internal predecessors, (162), 0 states have call successors, (0), 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 81 [2024-11-20 14:28:22,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:28:22,681 INFO L225 Difference]: With dead ends: 100 [2024-11-20 14:28:22,681 INFO L226 Difference]: Without dead ends: 100 [2024-11-20 14:28:22,682 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=248, Invalid=1914, Unknown=0, NotChecked=0, Total=2162 [2024-11-20 14:28:22,682 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 8 mSDsluCounter, 561 mSDsCounter, 0 mSdLazyCounter, 944 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 944 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-20 14:28:22,682 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 595 Invalid, 944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 944 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-20 14:28:22,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2024-11-20 14:28:22,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 95. [2024-11-20 14:28:22,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 91 states have (on average 1.0769230769230769) internal successors, (98), 94 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) [2024-11-20 14:28:22,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 98 transitions. [2024-11-20 14:28:22,684 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 98 transitions. Word has length 81 [2024-11-20 14:28:22,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:28:22,684 INFO L471 AbstractCegarLoop]: Abstraction has 95 states and 98 transitions. [2024-11-20 14:28:22,684 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 4.05) internal successors, (162), 41 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:28:22,684 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 98 transitions. [2024-11-20 14:28:22,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2024-11-20 14:28:22,685 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:28:22,685 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:28:22,692 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-11-20 14:28:22,885 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2024-11-20 14:28:22,885 INFO L396 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-20 14:28:22,885 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:28:22,886 INFO L85 PathProgramCache]: Analyzing trace with hash -716979886, now seen corresponding path program 5 times [2024-11-20 14:28:22,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:28:22,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970972398] [2024-11-20 14:28:22,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:28:22,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:28:22,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:28:23,423 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 15 proven. 100 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-20 14:28:23,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:28:23,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970972398] [2024-11-20 14:28:23,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970972398] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:28:23,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967041764] [2024-11-20 14:28:23,424 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-20 14:28:23,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:28:23,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:28:23,425 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 14:28:23,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-20 14:28:23,794 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-11-20 14:28:23,794 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 14:28:23,797 INFO L255 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 66 conjuncts are in the unsatisfiable core [2024-11-20 14:28:23,799 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 14:28:24,038 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 28 proven. 87 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-20 14:28:24,038 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 14:28:24,233 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 [2024-11-20 14:28:24,434 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 28 proven. 87 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-20 14:28:24,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967041764] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 14:28:24,434 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 14:28:24,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 41 [2024-11-20 14:28:24,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334665559] [2024-11-20 14:28:24,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 14:28:24,434 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-11-20 14:28:24,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:28:24,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-11-20 14:28:24,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=1483, Unknown=0, NotChecked=0, Total=1722 [2024-11-20 14:28:24,435 INFO L87 Difference]: Start difference. First operand 95 states and 98 transitions. Second operand has 42 states, 41 states have (on average 4.024390243902439) internal successors, (165), 42 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:28:24,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:28:24,779 INFO L93 Difference]: Finished difference Result 99 states and 102 transitions. [2024-11-20 14:28:24,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-20 14:28:24,779 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 4.024390243902439) internal successors, (165), 42 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2024-11-20 14:28:24,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:28:24,780 INFO L225 Difference]: With dead ends: 99 [2024-11-20 14:28:24,780 INFO L226 Difference]: Without dead ends: 99 [2024-11-20 14:28:24,780 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=298, Invalid=1958, Unknown=0, NotChecked=0, Total=2256 [2024-11-20 14:28:24,780 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 11 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-20 14:28:24,780 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 463 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 631 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-20 14:28:24,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2024-11-20 14:28:24,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2024-11-20 14:28:24,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 95 states have (on average 1.0736842105263158) internal successors, (102), 98 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:28:24,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 102 transitions. [2024-11-20 14:28:24,782 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 102 transitions. Word has length 82 [2024-11-20 14:28:24,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:28:24,782 INFO L471 AbstractCegarLoop]: Abstraction has 99 states and 102 transitions. [2024-11-20 14:28:24,782 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 4.024390243902439) internal successors, (165), 42 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:28:24,782 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 102 transitions. [2024-11-20 14:28:24,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2024-11-20 14:28:24,782 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:28:24,783 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:28:24,790 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-11-20 14:28:24,983 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:28:24,983 INFO L396 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-20 14:28:24,983 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:28:24,984 INFO L85 PathProgramCache]: Analyzing trace with hash -714531148, now seen corresponding path program 2 times [2024-11-20 14:28:24,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:28:24,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458506349] [2024-11-20 14:28:24,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:28:24,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:28:25,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:28:25,652 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 15 proven. 90 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-20 14:28:25,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:28:25,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458506349] [2024-11-20 14:28:25,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458506349] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:28:25,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170794275] [2024-11-20 14:28:25,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 14:28:25,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:28:25,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:28:25,655 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 14:28:25,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-20 14:28:25,862 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 14:28:25,862 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 14:28:25,866 INFO L255 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 64 conjuncts are in the unsatisfiable core [2024-11-20 14:28:25,868 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 14:28:25,873 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 [2024-11-20 14:28:26,147 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 28 proven. 77 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-20 14:28:26,147 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 14:28:26,633 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 28 proven. 77 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-20 14:28:26,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170794275] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 14:28:26,633 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 14:28:26,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 40 [2024-11-20 14:28:26,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759493718] [2024-11-20 14:28:26,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 14:28:26,634 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-11-20 14:28:26,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:28:26,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-11-20 14:28:26,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1449, Unknown=0, NotChecked=0, Total=1640 [2024-11-20 14:28:26,634 INFO L87 Difference]: Start difference. First operand 99 states and 102 transitions. Second operand has 41 states, 40 states have (on average 4.25) internal successors, (170), 41 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:28:26,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:28:26,960 INFO L93 Difference]: Finished difference Result 101 states and 103 transitions. [2024-11-20 14:28:26,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-20 14:28:26,960 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 4.25) internal successors, (170), 41 states have internal predecessors, (170), 0 states have call successors, (0), 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 85 [2024-11-20 14:28:26,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:28:26,961 INFO L225 Difference]: With dead ends: 101 [2024-11-20 14:28:26,961 INFO L226 Difference]: Without dead ends: 96 [2024-11-20 14:28:26,961 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=221, Invalid=1585, Unknown=0, NotChecked=0, Total=1806 [2024-11-20 14:28:26,961 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 6 mSDsluCounter, 460 mSDsCounter, 0 mSdLazyCounter, 773 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-20 14:28:26,962 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 495 Invalid, 773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 773 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-20 14:28:26,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2024-11-20 14:28:26,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2024-11-20 14:28:26,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 92 states have (on average 1.065217391304348) internal successors, (98), 95 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) [2024-11-20 14:28:26,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 98 transitions. [2024-11-20 14:28:26,963 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 98 transitions. Word has length 85 [2024-11-20 14:28:26,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:28:26,964 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 98 transitions. [2024-11-20 14:28:26,964 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 4.25) internal successors, (170), 41 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:28:26,964 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 98 transitions. [2024-11-20 14:28:26,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2024-11-20 14:28:26,964 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:28:26,964 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:28:26,972 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2024-11-20 14:28:27,165 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:28:27,165 INFO L396 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-20 14:28:27,165 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:28:27,165 INFO L85 PathProgramCache]: Analyzing trace with hash 537452643, now seen corresponding path program 9 times [2024-11-20 14:28:27,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:28:27,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412599664] [2024-11-20 14:28:27,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:28:27,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:28:27,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:28:27,524 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 32 proven. 105 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-11-20 14:28:27,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:28:27,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412599664] [2024-11-20 14:28:27,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412599664] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:28:27,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453505938] [2024-11-20 14:28:27,525 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-20 14:28:27,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:28:27,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:28:27,527 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 14:28:27,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-20 14:28:28,141 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-11-20 14:28:28,141 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 14:28:28,145 INFO L255 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 126 conjuncts are in the unsatisfiable core [2024-11-20 14:28:28,148 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 14:28:28,656 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 [2024-11-20 14:28:29,019 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 18 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:28:29,019 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 14:28:29,285 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 [2024-11-20 14:28:29,287 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 [2024-11-20 14:28:29,639 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 18 proven. 137 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-20 14:28:29,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453505938] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 14:28:29,640 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 14:28:29,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 26, 21] total 59 [2024-11-20 14:28:29,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350154828] [2024-11-20 14:28:29,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 14:28:29,640 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2024-11-20 14:28:29,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:28:29,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2024-11-20 14:28:29,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=3223, Unknown=0, NotChecked=0, Total=3422 [2024-11-20 14:28:29,642 INFO L87 Difference]: Start difference. First operand 96 states and 98 transitions. Second operand has 59 states, 59 states have (on average 3.6271186440677967) internal successors, (214), 59 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:28:31,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:28:31,042 INFO L93 Difference]: Finished difference Result 238 states and 241 transitions. [2024-11-20 14:28:31,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2024-11-20 14:28:31,042 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 3.6271186440677967) internal successors, (214), 59 states have internal predecessors, (214), 0 states have call successors, (0), 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 86 [2024-11-20 14:28:31,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:28:31,043 INFO L225 Difference]: With dead ends: 238 [2024-11-20 14:28:31,043 INFO L226 Difference]: Without dead ends: 110 [2024-11-20 14:28:31,044 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1018 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=328, Invalid=6478, Unknown=0, NotChecked=0, Total=6806 [2024-11-20 14:28:31,044 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 46 mSDsluCounter, 1348 mSDsCounter, 0 mSdLazyCounter, 2492 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 1385 SdHoareTripleChecker+Invalid, 2503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 2492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-20 14:28:31,044 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 1385 Invalid, 2503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 2492 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-20 14:28:31,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2024-11-20 14:28:31,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 104. [2024-11-20 14:28:31,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 100 states have (on average 1.06) internal successors, (106), 103 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:28:31,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 106 transitions. [2024-11-20 14:28:31,046 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 106 transitions. Word has length 86 [2024-11-20 14:28:31,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:28:31,046 INFO L471 AbstractCegarLoop]: Abstraction has 104 states and 106 transitions. [2024-11-20 14:28:31,046 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 3.6271186440677967) internal successors, (214), 59 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:28:31,047 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 106 transitions. [2024-11-20 14:28:31,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2024-11-20 14:28:31,047 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:28:31,047 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:28:31,058 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-11-20 14:28:31,247 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:28:31,248 INFO L396 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-20 14:28:31,248 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:28:31,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1120801443, now seen corresponding path program 10 times [2024-11-20 14:28:31,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:28:31,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240528473] [2024-11-20 14:28:31,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:28:31,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:28:31,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:28:31,888 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 28 proven. 131 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-20 14:28:31,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:28:31,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240528473] [2024-11-20 14:28:31,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240528473] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:28:31,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372707466] [2024-11-20 14:28:31,889 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-20 14:28:31,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:28:31,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:28:31,890 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 14:28:31,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-20 14:28:32,461 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-20 14:28:32,461 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 14:28:32,465 INFO L255 TraceCheckSpWp]: Trace formula consists of 502 conjuncts, 78 conjuncts are in the unsatisfiable core [2024-11-20 14:28:32,467 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 14:28:32,472 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 [2024-11-20 14:28:32,783 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 45 proven. 114 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-20 14:28:32,783 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 14:28:33,430 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 45 proven. 114 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-20 14:28:33,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372707466] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 14:28:33,431 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 14:28:33,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 43 [2024-11-20 14:28:33,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050536122] [2024-11-20 14:28:33,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 14:28:33,431 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-11-20 14:28:33,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:28:33,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-11-20 14:28:33,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=1633, Unknown=0, NotChecked=0, Total=1892 [2024-11-20 14:28:33,432 INFO L87 Difference]: Start difference. First operand 104 states and 106 transitions. Second operand has 44 states, 43 states have (on average 4.27906976744186) internal successors, (184), 44 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) [2024-11-20 14:28:33,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:28:33,834 INFO L93 Difference]: Finished difference Result 113 states and 116 transitions. [2024-11-20 14:28:33,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-20 14:28:33,835 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 4.27906976744186) internal successors, (184), 44 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 94 [2024-11-20 14:28:33,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:28:33,835 INFO L225 Difference]: With dead ends: 113 [2024-11-20 14:28:33,835 INFO L226 Difference]: Without dead ends: 113 [2024-11-20 14:28:33,836 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 623 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=327, Invalid=2223, Unknown=0, NotChecked=0, Total=2550 [2024-11-20 14:28:33,836 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 16 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 677 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-20 14:28:33,836 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 417 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 677 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-20 14:28:33,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2024-11-20 14:28:33,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 108. [2024-11-20 14:28:33,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 104 states have (on average 1.0673076923076923) internal successors, (111), 107 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:28:33,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 111 transitions. [2024-11-20 14:28:33,838 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 111 transitions. Word has length 94 [2024-11-20 14:28:33,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:28:33,839 INFO L471 AbstractCegarLoop]: Abstraction has 108 states and 111 transitions. [2024-11-20 14:28:33,839 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 4.27906976744186) internal successors, (184), 44 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) [2024-11-20 14:28:33,839 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 111 transitions. [2024-11-20 14:28:33,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2024-11-20 14:28:33,840 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:28:33,840 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:28:33,848 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2024-11-20 14:28:34,040 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2024-11-20 14:28:34,040 INFO L396 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-20 14:28:34,041 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:28:34,041 INFO L85 PathProgramCache]: Analyzing trace with hash -385106350, now seen corresponding path program 6 times [2024-11-20 14:28:34,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:28:34,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906083881] [2024-11-20 14:28:34,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:28:34,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:28:34,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:28:34,605 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 28 proven. 137 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-20 14:28:34,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:28:34,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906083881] [2024-11-20 14:28:34,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906083881] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:28:34,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912035228] [2024-11-20 14:28:34,606 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-20 14:28:34,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:28:34,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:28:34,608 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 14:28:34,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-11-20 14:28:35,453 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-11-20 14:28:35,453 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 14:28:35,457 INFO L255 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 60 conjuncts are in the unsatisfiable core [2024-11-20 14:28:35,459 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 14:28:35,784 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 45 proven. 120 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-20 14:28:35,784 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 14:28:36,107 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 7 treesize of output 5 [2024-11-20 14:28:36,214 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 45 proven. 120 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-20 14:28:36,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912035228] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 14:28:36,214 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 14:28:36,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 46 [2024-11-20 14:28:36,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515600841] [2024-11-20 14:28:36,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 14:28:36,215 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-11-20 14:28:36,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:28:36,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-11-20 14:28:36,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=1878, Unknown=0, NotChecked=0, Total=2162 [2024-11-20 14:28:36,216 INFO L87 Difference]: Start difference. First operand 108 states and 111 transitions. Second operand has 47 states, 46 states have (on average 4.0) internal successors, (184), 47 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) [2024-11-20 14:28:36,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:28:36,693 INFO L93 Difference]: Finished difference Result 112 states and 115 transitions. [2024-11-20 14:28:36,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-20 14:28:36,694 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 4.0) internal successors, (184), 47 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 95 [2024-11-20 14:28:36,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:28:36,694 INFO L225 Difference]: With dead ends: 112 [2024-11-20 14:28:36,694 INFO L226 Difference]: Without dead ends: 112 [2024-11-20 14:28:36,695 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 155 SyntacticMatches, 7 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1132 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=392, Invalid=2578, Unknown=0, NotChecked=0, Total=2970 [2024-11-20 14:28:36,695 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 13 mSDsluCounter, 606 mSDsCounter, 0 mSdLazyCounter, 935 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 646 SdHoareTripleChecker+Invalid, 936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 935 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-20 14:28:36,695 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 646 Invalid, 936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 935 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-20 14:28:36,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2024-11-20 14:28:36,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2024-11-20 14:28:36,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 108 states have (on average 1.0648148148148149) internal successors, (115), 111 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:28:36,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 115 transitions. [2024-11-20 14:28:36,697 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 115 transitions. Word has length 95 [2024-11-20 14:28:36,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:28:36,697 INFO L471 AbstractCegarLoop]: Abstraction has 112 states and 115 transitions. [2024-11-20 14:28:36,697 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 4.0) internal successors, (184), 47 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) [2024-11-20 14:28:36,697 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 115 transitions. [2024-11-20 14:28:36,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2024-11-20 14:28:36,698 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:28:36,698 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:28:36,706 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-11-20 14:28:36,898 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2024-11-20 14:28:36,898 INFO L396 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-20 14:28:36,898 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:28:36,899 INFO L85 PathProgramCache]: Analyzing trace with hash -884735564, now seen corresponding path program 3 times [2024-11-20 14:28:36,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:28:36,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488816480] [2024-11-20 14:28:36,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:28:36,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:28:36,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:28:37,609 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 28 proven. 125 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-20 14:28:37,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:28:37,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488816480] [2024-11-20 14:28:37,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488816480] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:28:37,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086361658] [2024-11-20 14:28:37,610 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-20 14:28:37,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:28:37,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:28:37,611 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 14:28:37,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-11-20 14:28:38,360 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-11-20 14:28:38,360 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 14:28:38,364 INFO L255 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 62 conjuncts are in the unsatisfiable core [2024-11-20 14:28:38,366 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 14:28:38,746 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 45 proven. 108 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-20 14:28:38,746 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 14:28:39,093 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 7 treesize of output 5 [2024-11-20 14:28:39,269 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 45 proven. 108 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-20 14:28:39,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086361658] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 14:28:39,269 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 14:28:39,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 45 [2024-11-20 14:28:39,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806300803] [2024-11-20 14:28:39,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 14:28:39,270 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-11-20 14:28:39,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:28:39,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-11-20 14:28:39,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=1797, Unknown=0, NotChecked=0, Total=2070 [2024-11-20 14:28:39,271 INFO L87 Difference]: Start difference. First operand 112 states and 115 transitions. Second operand has 46 states, 45 states have (on average 4.266666666666667) internal successors, (192), 46 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:28:39,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:28:39,661 INFO L93 Difference]: Finished difference Result 114 states and 116 transitions. [2024-11-20 14:28:39,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-20 14:28:39,661 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 4.266666666666667) internal successors, (192), 46 states have internal predecessors, (192), 0 states have call successors, (0), 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 98 [2024-11-20 14:28:39,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:28:39,662 INFO L225 Difference]: With dead ends: 114 [2024-11-20 14:28:39,662 INFO L226 Difference]: Without dead ends: 109 [2024-11-20 14:28:39,662 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 161 SyntacticMatches, 7 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 916 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=361, Invalid=2395, Unknown=0, NotChecked=0, Total=2756 [2024-11-20 14:28:39,663 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 3 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 695 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 452 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-20 14:28:39,663 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 452 Invalid, 695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 695 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-20 14:28:39,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2024-11-20 14:28:39,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2024-11-20 14:28:39,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 105 states have (on average 1.0571428571428572) internal successors, (111), 108 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:28:39,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 111 transitions. [2024-11-20 14:28:39,665 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 111 transitions. Word has length 98 [2024-11-20 14:28:39,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:28:39,665 INFO L471 AbstractCegarLoop]: Abstraction has 109 states and 111 transitions. [2024-11-20 14:28:39,665 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 4.266666666666667) internal successors, (192), 46 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:28:39,665 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 111 transitions. [2024-11-20 14:28:39,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2024-11-20 14:28:39,666 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:28:39,666 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:28:39,675 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2024-11-20 14:28:39,866 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:28:39,867 INFO L396 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-20 14:28:39,867 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:28:39,867 INFO L85 PathProgramCache]: Analyzing trace with hash -443916957, now seen corresponding path program 11 times [2024-11-20 14:28:39,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:28:39,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111590854] [2024-11-20 14:28:39,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:28:39,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:28:39,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:28:40,257 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 38 proven. 153 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2024-11-20 14:28:40,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:28:40,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111590854] [2024-11-20 14:28:40,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111590854] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:28:40,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533109366] [2024-11-20 14:28:40,258 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-20 14:28:40,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:28:40,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:28:40,259 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 14:28:40,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-11-20 14:28:40,980 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-11-20 14:28:40,980 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 14:28:40,983 INFO L255 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 93 conjuncts are in the unsatisfiable core [2024-11-20 14:28:40,986 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 14:28:40,989 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 [2024-11-20 14:28:41,199 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 [2024-11-20 14:28:42,406 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 14:28:42,406 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 20 treesize of output 15 [2024-11-20 14:28:42,522 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 45 proven. 147 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-20 14:28:42,522 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 14:28:43,134 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 [2024-11-20 14:28:43,136 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 [2024-11-20 14:28:43,906 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 45 proven. 147 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-20 14:28:43,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533109366] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 14:28:43,906 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 14:28:43,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 20] total 57 [2024-11-20 14:28:43,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565620390] [2024-11-20 14:28:43,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 14:28:43,907 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2024-11-20 14:28:43,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:28:43,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2024-11-20 14:28:43,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=2968, Unknown=0, NotChecked=0, Total=3192 [2024-11-20 14:28:43,908 INFO L87 Difference]: Start difference. First operand 109 states and 111 transitions. Second operand has 57 states, 57 states have (on average 4.017543859649122) internal successors, (229), 57 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) [2024-11-20 14:28:52,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:28:52,032 INFO L93 Difference]: Finished difference Result 162 states and 165 transitions. [2024-11-20 14:28:52,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2024-11-20 14:28:52,032 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 4.017543859649122) internal successors, (229), 57 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) Word has length 99 [2024-11-20 14:28:52,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:28:52,033 INFO L225 Difference]: With dead ends: 162 [2024-11-20 14:28:52,033 INFO L226 Difference]: Without dead ends: 125 [2024-11-20 14:28:52,034 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1282 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=592, Invalid=8150, Unknown=0, NotChecked=0, Total=8742 [2024-11-20 14:28:52,034 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 32 mSDsluCounter, 918 mSDsCounter, 0 mSdLazyCounter, 2714 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 950 SdHoareTripleChecker+Invalid, 2714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-20 14:28:52,034 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 950 Invalid, 2714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2714 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-20 14:28:52,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2024-11-20 14:28:52,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 117. [2024-11-20 14:28:52,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 113 states have (on average 1.0619469026548674) internal successors, (120), 116 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) [2024-11-20 14:28:52,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 120 transitions. [2024-11-20 14:28:52,037 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 120 transitions. Word has length 99 [2024-11-20 14:28:52,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:28:52,037 INFO L471 AbstractCegarLoop]: Abstraction has 117 states and 120 transitions. [2024-11-20 14:28:52,037 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 4.017543859649122) internal successors, (229), 57 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) [2024-11-20 14:28:52,037 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 120 transitions. [2024-11-20 14:28:52,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-11-20 14:28:52,038 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:28:52,038 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:28:52,049 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2024-11-20 14:28:52,238 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2024-11-20 14:28:52,239 INFO L396 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-20 14:28:52,239 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:28:52,239 INFO L85 PathProgramCache]: Analyzing trace with hash -547070871, now seen corresponding path program 7 times [2024-11-20 14:28:52,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:28:52,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730962540] [2024-11-20 14:28:52,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:28:52,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:28:52,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:28:52,819 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 45 proven. 179 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-20 14:28:52,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:28:52,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730962540] [2024-11-20 14:28:52,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730962540] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:28:52,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533764107] [2024-11-20 14:28:52,819 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-20 14:28:52,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:28:52,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:28:52,821 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 14:28:52,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process