./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/cstrncat-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4a390ef5 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/cstrncat-alloca-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d8697c629a22dee8b5a51c26261db89d3e1115a5e0c1bc03fd54c09ffc3b9b0d --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4a390ef-m [2024-10-24 16:04:25,469 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-24 16:04:25,541 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-24 16:04:25,550 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-24 16:04:25,550 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-24 16:04:25,582 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-24 16:04:25,583 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-24 16:04:25,583 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-24 16:04:25,583 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-24 16:04:25,584 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-24 16:04:25,584 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-24 16:04:25,584 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-24 16:04:25,585 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-24 16:04:25,585 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-24 16:04:25,585 INFO L153 SettingsManager]: * Use SBE=true [2024-10-24 16:04:25,585 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-24 16:04:25,585 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-24 16:04:25,586 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-24 16:04:25,586 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-24 16:04:25,586 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-24 16:04:25,587 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-24 16:04:25,590 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-24 16:04:25,591 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-24 16:04:25,591 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-24 16:04:25,591 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-24 16:04:25,591 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-24 16:04:25,592 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-24 16:04:25,592 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-24 16:04:25,592 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-24 16:04:25,592 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-24 16:04:25,592 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-24 16:04:25,593 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-24 16:04:25,593 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-24 16:04:25,593 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 16:04:25,593 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-24 16:04:25,593 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-24 16:04:25,593 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-24 16:04:25,594 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-24 16:04:25,594 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-24 16:04:25,594 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-24 16:04:25,594 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-24 16:04:25,595 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-24 16:04:25,595 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d8697c629a22dee8b5a51c26261db89d3e1115a5e0c1bc03fd54c09ffc3b9b0d [2024-10-24 16:04:25,832 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-24 16:04:25,869 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-24 16:04:25,872 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-24 16:04:25,873 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-24 16:04:25,874 INFO L274 PluginConnector]: CDTParser initialized [2024-10-24 16:04:25,875 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/cstrncat-alloca-2.i [2024-10-24 16:04:27,190 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-24 16:04:27,421 INFO L384 CDTParser]: Found 1 translation units. [2024-10-24 16:04:27,421 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/cstrncat-alloca-2.i [2024-10-24 16:04:27,434 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e531ae3e0/bf223477872c4d4a8f076a296b50b9d4/FLAG659ad5165 [2024-10-24 16:04:27,757 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e531ae3e0/bf223477872c4d4a8f076a296b50b9d4 [2024-10-24 16:04:27,759 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-24 16:04:27,761 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-24 16:04:27,764 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-24 16:04:27,764 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-24 16:04:27,772 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-24 16:04:27,773 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 04:04:27" (1/1) ... [2024-10-24 16:04:27,774 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@bb20ba6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:04:27, skipping insertion in model container [2024-10-24 16:04:27,774 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 04:04:27" (1/1) ... [2024-10-24 16:04:27,810 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-24 16:04:28,066 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 16:04:28,075 INFO L200 MainTranslator]: Completed pre-run [2024-10-24 16:04:28,112 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 16:04:28,135 INFO L204 MainTranslator]: Completed translation [2024-10-24 16:04:28,135 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:04:28 WrapperNode [2024-10-24 16:04:28,135 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-24 16:04:28,136 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-24 16:04:28,137 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-24 16:04:28,137 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-24 16:04:28,143 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:04:28" (1/1) ... [2024-10-24 16:04:28,159 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:04:28" (1/1) ... [2024-10-24 16:04:28,181 INFO L138 Inliner]: procedures = 117, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 112 [2024-10-24 16:04:28,181 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-24 16:04:28,182 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-24 16:04:28,182 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-24 16:04:28,182 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-24 16:04:28,190 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:04:28" (1/1) ... [2024-10-24 16:04:28,190 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:04:28" (1/1) ... [2024-10-24 16:04:28,192 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:04:28" (1/1) ... [2024-10-24 16:04:28,209 INFO L175 MemorySlicer]: Split 9 memory accesses to 2 slices as follows [3, 6]. 67 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 [2, 4]. [2024-10-24 16:04:28,209 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:04:28" (1/1) ... [2024-10-24 16:04:28,211 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:04:28" (1/1) ... [2024-10-24 16:04:28,216 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:04:28" (1/1) ... [2024-10-24 16:04:28,220 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:04:28" (1/1) ... [2024-10-24 16:04:28,221 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:04:28" (1/1) ... [2024-10-24 16:04:28,222 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:04:28" (1/1) ... [2024-10-24 16:04:28,224 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-24 16:04:28,225 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-24 16:04:28,225 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-24 16:04:28,225 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-24 16:04:28,226 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:04:28" (1/1) ... [2024-10-24 16:04:28,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 16:04:28,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:04:28,263 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-24 16:04:28,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-24 16:04:28,312 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-24 16:04:28,312 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-24 16:04:28,312 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-24 16:04:28,312 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-24 16:04:28,312 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-24 16:04:28,313 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-24 16:04:28,313 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-24 16:04:28,313 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-24 16:04:28,417 INFO L238 CfgBuilder]: Building ICFG [2024-10-24 16:04:28,419 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-24 16:04:28,671 INFO L? ?]: Removed 69 outVars from TransFormulas that were not future-live. [2024-10-24 16:04:28,672 INFO L287 CfgBuilder]: Performing block encoding [2024-10-24 16:04:28,710 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-24 16:04:28,710 INFO L314 CfgBuilder]: Removed 4 assume(true) statements. [2024-10-24 16:04:28,710 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 04:04:28 BoogieIcfgContainer [2024-10-24 16:04:28,710 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-24 16:04:28,711 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-24 16:04:28,711 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-24 16:04:28,715 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-24 16:04:28,715 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 04:04:27" (1/3) ... [2024-10-24 16:04:28,716 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47c9c15f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 04:04:28, skipping insertion in model container [2024-10-24 16:04:28,716 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:04:28" (2/3) ... [2024-10-24 16:04:28,717 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47c9c15f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 04:04:28, skipping insertion in model container [2024-10-24 16:04:28,717 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 04:04:28" (3/3) ... [2024-10-24 16:04:28,718 INFO L112 eAbstractionObserver]: Analyzing ICFG cstrncat-alloca-2.i [2024-10-24 16:04:28,730 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-24 16:04:28,730 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 19 error locations. [2024-10-24 16:04:28,762 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-24 16:04:28,767 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;@fc8c271, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-24 16:04:28,767 INFO L334 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2024-10-24 16:04:28,770 INFO L276 IsEmpty]: Start isEmpty. Operand has 45 states, 25 states have (on average 2.32) internal successors, (58), 44 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:28,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-10-24 16:04:28,774 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:04:28,774 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-24 16:04:28,774 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-24 16:04:28,780 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:04:28,780 INFO L85 PathProgramCache]: Analyzing trace with hash 405175949, now seen corresponding path program 1 times [2024-10-24 16:04:28,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:04:28,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484169503] [2024-10-24 16:04:28,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:04:28,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:04:28,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:04:28,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:04:28,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:04:28,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484169503] [2024-10-24 16:04:28,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484169503] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 16:04:28,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 16:04:28,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-24 16:04:28,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926504798] [2024-10-24 16:04:28,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 16:04:28,910 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 16:04:28,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:04:28,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 16:04:28,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 16:04:28,935 INFO L87 Difference]: Start difference. First operand has 45 states, 25 states have (on average 2.32) internal successors, (58), 44 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:28,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:04:28,992 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2024-10-24 16:04:28,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 16:04:28,994 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-10-24 16:04:28,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:04:29,000 INFO L225 Difference]: With dead ends: 46 [2024-10-24 16:04:29,001 INFO L226 Difference]: Without dead ends: 44 [2024-10-24 16:04:29,003 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 16:04:29,007 INFO L432 NwaCegarLoop]: 46 mSDtfsCounter, 3 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-24 16:04:29,008 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 70 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-24 16:04:29,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-10-24 16:04:29,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2024-10-24 16:04:29,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 25 states have (on average 2.08) internal successors, (52), 43 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:29,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2024-10-24 16:04:29,035 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 6 [2024-10-24 16:04:29,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:04:29,036 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2024-10-24 16:04:29,036 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:29,036 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2024-10-24 16:04:29,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-10-24 16:04:29,037 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:04:29,038 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:04:29,038 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-24 16:04:29,038 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-24 16:04:29,039 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:04:29,039 INFO L85 PathProgramCache]: Analyzing trace with hash -324448364, now seen corresponding path program 1 times [2024-10-24 16:04:29,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:04:29,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773771031] [2024-10-24 16:04:29,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:04:29,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:04:29,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:04:29,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:04:29,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:04:29,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773771031] [2024-10-24 16:04:29,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773771031] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 16:04:29,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 16:04:29,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-24 16:04:29,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909621102] [2024-10-24 16:04:29,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 16:04:29,128 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-24 16:04:29,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:04:29,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-24 16:04:29,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-24 16:04:29,129 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:29,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:04:29,216 INFO L93 Difference]: Finished difference Result 47 states and 56 transitions. [2024-10-24 16:04:29,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-24 16:04:29,218 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-10-24 16:04:29,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:04:29,218 INFO L225 Difference]: With dead ends: 47 [2024-10-24 16:04:29,218 INFO L226 Difference]: Without dead ends: 44 [2024-10-24 16:04:29,219 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-10-24 16:04:29,219 INFO L432 NwaCegarLoop]: 46 mSDtfsCounter, 6 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 16:04:29,220 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 151 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 16:04:29,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-10-24 16:04:29,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2024-10-24 16:04:29,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 25 states have (on average 2.04) internal successors, (51), 43 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:29,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2024-10-24 16:04:29,224 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 7 [2024-10-24 16:04:29,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:04:29,225 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2024-10-24 16:04:29,225 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:29,225 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2024-10-24 16:04:29,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-10-24 16:04:29,226 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:04:29,226 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:04:29,226 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-24 16:04:29,226 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-24 16:04:29,227 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:04:29,228 INFO L85 PathProgramCache]: Analyzing trace with hash -267190062, now seen corresponding path program 1 times [2024-10-24 16:04:29,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:04:29,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351053129] [2024-10-24 16:04:29,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:04:29,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:04:29,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:04:29,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:04:29,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:04:29,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351053129] [2024-10-24 16:04:29,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351053129] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 16:04:29,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 16:04:29,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 16:04:29,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103845344] [2024-10-24 16:04:29,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 16:04:29,378 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 16:04:29,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:04:29,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 16:04:29,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 16:04:29,379 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:29,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:04:29,422 INFO L93 Difference]: Finished difference Result 42 states and 49 transitions. [2024-10-24 16:04:29,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 16:04:29,423 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-10-24 16:04:29,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:04:29,424 INFO L225 Difference]: With dead ends: 42 [2024-10-24 16:04:29,424 INFO L226 Difference]: Without dead ends: 42 [2024-10-24 16:04:29,424 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 16:04:29,425 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 12 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-24 16:04:29,425 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 57 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-24 16:04:29,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-10-24 16:04:29,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2024-10-24 16:04:29,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 25 states have (on average 1.96) internal successors, (49), 41 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:29,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2024-10-24 16:04:29,428 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 7 [2024-10-24 16:04:29,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:04:29,431 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2024-10-24 16:04:29,431 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:29,431 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2024-10-24 16:04:29,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-10-24 16:04:29,431 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:04:29,431 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:04:29,431 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-24 16:04:29,432 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-24 16:04:29,432 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:04:29,432 INFO L85 PathProgramCache]: Analyzing trace with hash -267190061, now seen corresponding path program 1 times [2024-10-24 16:04:29,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:04:29,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650157623] [2024-10-24 16:04:29,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:04:29,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:04:29,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:04:29,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:04:29,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:04:29,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650157623] [2024-10-24 16:04:29,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650157623] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 16:04:29,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 16:04:29,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-24 16:04:29,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674792917] [2024-10-24 16:04:29,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 16:04:29,711 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-24 16:04:29,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:04:29,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-24 16:04:29,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-24 16:04:29,711 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:29,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:04:29,853 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2024-10-24 16:04:29,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-24 16:04:29,854 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-10-24 16:04:29,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:04:29,854 INFO L225 Difference]: With dead ends: 44 [2024-10-24 16:04:29,854 INFO L226 Difference]: Without dead ends: 44 [2024-10-24 16:04:29,854 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-10-24 16:04:29,855 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 31 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 16:04:29,856 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 111 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 16:04:29,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-10-24 16:04:29,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2024-10-24 16:04:29,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 43 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:29,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2024-10-24 16:04:29,864 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 7 [2024-10-24 16:04:29,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:04:29,864 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2024-10-24 16:04:29,864 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:29,864 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2024-10-24 16:04:29,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-10-24 16:04:29,865 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:04:29,865 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:04:29,865 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-24 16:04:29,866 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-24 16:04:29,866 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:04:29,866 INFO L85 PathProgramCache]: Analyzing trace with hash 928485337, now seen corresponding path program 1 times [2024-10-24 16:04:29,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:04:29,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072482520] [2024-10-24 16:04:29,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:04:29,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:04:29,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:04:30,086 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:04:30,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:04:30,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072482520] [2024-10-24 16:04:30,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072482520] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:04:30,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614317195] [2024-10-24 16:04:30,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:04:30,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:04:30,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:04:30,090 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:04:30,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-24 16:04:30,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:04:30,145 INFO L255 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-10-24 16:04:30,149 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:04:30,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-24 16:04:30,216 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2024-10-24 16:04:30,226 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-10-24 16:04:30,360 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:04:30,360 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:04:30,466 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-24 16:04:30,540 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:04:30,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614317195] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:04:30,544 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:04:30,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2024-10-24 16:04:30,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724758273] [2024-10-24 16:04:30,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:04:30,545 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-24 16:04:30,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:04:30,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-24 16:04:30,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2024-10-24 16:04:30,546 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:30,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:04:30,851 INFO L93 Difference]: Finished difference Result 57 states and 71 transitions. [2024-10-24 16:04:30,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-24 16:04:30,852 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-10-24 16:04:30,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:04:30,852 INFO L225 Difference]: With dead ends: 57 [2024-10-24 16:04:30,852 INFO L226 Difference]: Without dead ends: 57 [2024-10-24 16:04:30,853 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=196, Invalid=404, Unknown=0, NotChecked=0, Total=600 [2024-10-24 16:04:30,854 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 72 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 16:04:30,854 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 222 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 16:04:30,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-10-24 16:04:30,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 41. [2024-10-24 16:04:30,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 25 states have (on average 1.92) internal successors, (48), 40 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:30,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2024-10-24 16:04:30,862 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 9 [2024-10-24 16:04:30,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:04:30,863 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2024-10-24 16:04:30,863 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:30,863 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2024-10-24 16:04:30,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-10-24 16:04:30,863 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:04:30,863 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:04:30,878 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-24 16:04:31,064 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:04:31,065 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-24 16:04:31,066 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:04:31,066 INFO L85 PathProgramCache]: Analyzing trace with hash 928337918, now seen corresponding path program 1 times [2024-10-24 16:04:31,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:04:31,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008333091] [2024-10-24 16:04:31,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:04:31,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:04:31,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:04:31,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:04:31,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:04:31,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008333091] [2024-10-24 16:04:31,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008333091] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 16:04:31,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 16:04:31,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-24 16:04:31,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843879265] [2024-10-24 16:04:31,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 16:04:31,119 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 16:04:31,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:04:31,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 16:04:31,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-24 16:04:31,120 INFO L87 Difference]: Start difference. First operand 41 states and 48 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) [2024-10-24 16:04:31,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:04:31,149 INFO L93 Difference]: Finished difference Result 52 states and 62 transitions. [2024-10-24 16:04:31,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-24 16:04:31,149 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 [2024-10-24 16:04:31,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:04:31,150 INFO L225 Difference]: With dead ends: 52 [2024-10-24 16:04:31,150 INFO L226 Difference]: Without dead ends: 52 [2024-10-24 16:04:31,150 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-24 16:04:31,151 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 8 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-24 16:04:31,151 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 108 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-24 16:04:31,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-10-24 16:04:31,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 47. [2024-10-24 16:04:31,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 46 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:31,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2024-10-24 16:04:31,159 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 9 [2024-10-24 16:04:31,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:04:31,159 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2024-10-24 16:04:31,159 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) [2024-10-24 16:04:31,160 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2024-10-24 16:04:31,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-10-24 16:04:31,160 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:04:31,160 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:04:31,160 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-24 16:04:31,160 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-24 16:04:31,163 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:04:31,163 INFO L85 PathProgramCache]: Analyzing trace with hash -1591622016, now seen corresponding path program 1 times [2024-10-24 16:04:31,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:04:31,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909601221] [2024-10-24 16:04:31,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:04:31,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:04:31,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:04:31,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:04:31,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:04:31,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909601221] [2024-10-24 16:04:31,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909601221] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 16:04:31,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 16:04:31,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 16:04:31,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415017295] [2024-10-24 16:04:31,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 16:04:31,192 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 16:04:31,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:04:31,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 16:04:31,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 16:04:31,194 INFO L87 Difference]: Start difference. First operand 47 states and 56 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) [2024-10-24 16:04:31,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:04:31,219 INFO L93 Difference]: Finished difference Result 45 states and 54 transitions. [2024-10-24 16:04:31,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 16:04:31,220 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 [2024-10-24 16:04:31,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:04:31,220 INFO L225 Difference]: With dead ends: 45 [2024-10-24 16:04:31,221 INFO L226 Difference]: Without dead ends: 45 [2024-10-24 16:04:31,221 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 16:04:31,221 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 7 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-24 16:04:31,222 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 56 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-24 16:04:31,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-10-24 16:04:31,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2024-10-24 16:04:31,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 44 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:31,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 54 transitions. [2024-10-24 16:04:31,225 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 54 transitions. Word has length 9 [2024-10-24 16:04:31,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:04:31,225 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 54 transitions. [2024-10-24 16:04:31,225 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) [2024-10-24 16:04:31,225 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 54 transitions. [2024-10-24 16:04:31,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-10-24 16:04:31,226 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:04:31,226 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:04:31,227 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-24 16:04:31,228 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-24 16:04:31,228 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:04:31,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1591622015, now seen corresponding path program 1 times [2024-10-24 16:04:31,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:04:31,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110732137] [2024-10-24 16:04:31,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:04:31,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:04:31,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:04:31,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:04:31,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:04:31,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110732137] [2024-10-24 16:04:31,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110732137] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 16:04:31,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 16:04:31,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-24 16:04:31,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729419815] [2024-10-24 16:04:31,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 16:04:31,281 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-24 16:04:31,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:04:31,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-24 16:04:31,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-24 16:04:31,282 INFO L87 Difference]: Start difference. First operand 45 states and 54 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:31,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:04:31,324 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2024-10-24 16:04:31,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-24 16:04:31,324 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-10-24 16:04:31,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:04:31,325 INFO L225 Difference]: With dead ends: 55 [2024-10-24 16:04:31,325 INFO L226 Difference]: Without dead ends: 55 [2024-10-24 16:04:31,325 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-10-24 16:04:31,327 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 14 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-24 16:04:31,327 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 98 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-24 16:04:31,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-10-24 16:04:31,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 46. [2024-10-24 16:04:31,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 32 states have (on average 1.75) internal successors, (56), 45 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:31,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2024-10-24 16:04:31,331 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 9 [2024-10-24 16:04:31,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:04:31,332 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2024-10-24 16:04:31,333 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:31,333 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2024-10-24 16:04:31,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-10-24 16:04:31,333 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:04:31,333 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:04:31,333 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-24 16:04:31,333 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-24 16:04:31,333 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:04:31,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1286297224, now seen corresponding path program 1 times [2024-10-24 16:04:31,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:04:31,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160887471] [2024-10-24 16:04:31,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:04:31,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:04:31,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:04:31,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:04:31,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:04:31,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160887471] [2024-10-24 16:04:31,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160887471] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 16:04:31,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 16:04:31,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-24 16:04:31,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939190526] [2024-10-24 16:04:31,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 16:04:31,502 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-24 16:04:31,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:04:31,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-24 16:04:31,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-24 16:04:31,503 INFO L87 Difference]: Start difference. First operand 46 states and 56 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) [2024-10-24 16:04:31,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:04:31,625 INFO L93 Difference]: Finished difference Result 69 states and 86 transitions. [2024-10-24 16:04:31,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-24 16:04:31,626 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 [2024-10-24 16:04:31,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:04:31,626 INFO L225 Difference]: With dead ends: 69 [2024-10-24 16:04:31,626 INFO L226 Difference]: Without dead ends: 69 [2024-10-24 16:04:31,627 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-10-24 16:04:31,627 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 38 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 16:04:31,627 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 78 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 16:04:31,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-10-24 16:04:31,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 54. [2024-10-24 16:04:31,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 40 states have (on average 1.65) internal successors, (66), 53 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:31,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 66 transitions. [2024-10-24 16:04:31,630 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 66 transitions. Word has length 10 [2024-10-24 16:04:31,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:04:31,630 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 66 transitions. [2024-10-24 16:04:31,630 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) [2024-10-24 16:04:31,631 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 66 transitions. [2024-10-24 16:04:31,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-10-24 16:04:31,631 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:04:31,631 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:04:31,631 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-24 16:04:31,631 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-24 16:04:31,632 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:04:31,632 INFO L85 PathProgramCache]: Analyzing trace with hash 488710138, now seen corresponding path program 1 times [2024-10-24 16:04:31,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:04:31,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234245192] [2024-10-24 16:04:31,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:04:31,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:04:31,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:04:31,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:04:31,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:04:31,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234245192] [2024-10-24 16:04:31,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234245192] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 16:04:31,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 16:04:31,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-24 16:04:31,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427632490] [2024-10-24 16:04:31,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 16:04:31,763 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-24 16:04:31,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:04:31,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-24 16:04:31,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-10-24 16:04:31,765 INFO L87 Difference]: Start difference. First operand 54 states and 66 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:31,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:04:31,809 INFO L93 Difference]: Finished difference Result 53 states and 65 transitions. [2024-10-24 16:04:31,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-24 16:04:31,810 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-10-24 16:04:31,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:04:31,810 INFO L225 Difference]: With dead ends: 53 [2024-10-24 16:04:31,810 INFO L226 Difference]: Without dead ends: 53 [2024-10-24 16:04:31,810 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-10-24 16:04:31,811 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-24 16:04:31,811 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 58 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-24 16:04:31,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-10-24 16:04:31,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 45. [2024-10-24 16:04:31,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 32 states have (on average 1.71875) internal successors, (55), 44 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:31,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 55 transitions. [2024-10-24 16:04:31,813 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 55 transitions. Word has length 10 [2024-10-24 16:04:31,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:04:31,813 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 55 transitions. [2024-10-24 16:04:31,813 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:31,815 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 55 transitions. [2024-10-24 16:04:31,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-10-24 16:04:31,816 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:04:31,816 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:04:31,816 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-10-24 16:04:31,817 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-24 16:04:31,817 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:04:31,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1220508275, now seen corresponding path program 1 times [2024-10-24 16:04:31,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:04:31,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973961174] [2024-10-24 16:04:31,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:04:31,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:04:31,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:04:31,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:04:31,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:04:31,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973961174] [2024-10-24 16:04:31,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973961174] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 16:04:31,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 16:04:31,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-24 16:04:31,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017469616] [2024-10-24 16:04:31,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 16:04:31,899 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 16:04:31,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:04:31,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 16:04:31,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-24 16:04:31,900 INFO L87 Difference]: Start difference. First operand 45 states and 55 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) [2024-10-24 16:04:31,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:04:31,934 INFO L93 Difference]: Finished difference Result 50 states and 60 transitions. [2024-10-24 16:04:31,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-24 16:04:31,935 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 [2024-10-24 16:04:31,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:04:31,935 INFO L225 Difference]: With dead ends: 50 [2024-10-24 16:04:31,935 INFO L226 Difference]: Without dead ends: 50 [2024-10-24 16:04:31,936 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-24 16:04:31,936 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 3 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-24 16:04:31,936 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 91 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-24 16:04:31,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-10-24 16:04:31,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2024-10-24 16:04:31,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 37 states have (on average 1.6216216216216217) internal successors, (60), 49 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:31,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2024-10-24 16:04:31,938 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 11 [2024-10-24 16:04:31,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:04:31,939 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2024-10-24 16:04:31,939 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) [2024-10-24 16:04:31,939 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2024-10-24 16:04:31,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-10-24 16:04:31,939 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:04:31,939 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:04:31,939 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-10-24 16:04:31,939 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-24 16:04:31,940 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:04:31,940 INFO L85 PathProgramCache]: Analyzing trace with hash -398781561, now seen corresponding path program 1 times [2024-10-24 16:04:31,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:04:31,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864303101] [2024-10-24 16:04:31,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:04:31,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:04:31,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:04:32,073 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:04:32,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:04:32,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864303101] [2024-10-24 16:04:32,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864303101] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:04:32,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784432931] [2024-10-24 16:04:32,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:04:32,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:04:32,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:04:32,075 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:04:32,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-24 16:04:32,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:04:32,121 INFO L255 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-24 16:04:32,122 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:04:32,132 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-10-24 16:04:32,253 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:04:32,254 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:04:32,410 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:04:32,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784432931] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:04:32,410 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:04:32,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2024-10-24 16:04:32,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913139684] [2024-10-24 16:04:32,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:04:32,411 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-24 16:04:32,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:04:32,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-24 16:04:32,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2024-10-24 16:04:32,412 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand has 16 states, 15 states have (on average 1.6) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:32,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:04:32,690 INFO L93 Difference]: Finished difference Result 88 states and 112 transitions. [2024-10-24 16:04:32,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-24 16:04:32,690 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.6) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-10-24 16:04:32,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:04:32,692 INFO L225 Difference]: With dead ends: 88 [2024-10-24 16:04:32,692 INFO L226 Difference]: Without dead ends: 88 [2024-10-24 16:04:32,692 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=157, Invalid=395, Unknown=0, NotChecked=0, Total=552 [2024-10-24 16:04:32,693 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 42 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 16:04:32,693 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 157 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 16:04:32,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-10-24 16:04:32,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 62. [2024-10-24 16:04:32,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 49 states have (on average 1.5714285714285714) internal successors, (77), 61 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:32,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 77 transitions. [2024-10-24 16:04:32,696 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 77 transitions. Word has length 11 [2024-10-24 16:04:32,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:04:32,697 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 77 transitions. [2024-10-24 16:04:32,697 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.6) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:32,697 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 77 transitions. [2024-10-24 16:04:32,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-10-24 16:04:32,698 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:04:32,698 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:04:32,716 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-24 16:04:32,898 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-10-24 16:04:32,899 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-24 16:04:32,899 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:04:32,899 INFO L85 PathProgramCache]: Analyzing trace with hash -540449905, now seen corresponding path program 1 times [2024-10-24 16:04:32,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:04:32,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095174315] [2024-10-24 16:04:32,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:04:32,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:04:32,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:04:32,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:04:32,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:04:32,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095174315] [2024-10-24 16:04:32,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095174315] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 16:04:32,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 16:04:32,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-24 16:04:32,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678126504] [2024-10-24 16:04:32,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 16:04:32,995 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-24 16:04:32,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:04:32,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-24 16:04:32,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-24 16:04:32,996 INFO L87 Difference]: Start difference. First operand 62 states and 77 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) [2024-10-24 16:04:33,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:04:33,030 INFO L93 Difference]: Finished difference Result 72 states and 88 transitions. [2024-10-24 16:04:33,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-24 16:04:33,030 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 [2024-10-24 16:04:33,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:04:33,031 INFO L225 Difference]: With dead ends: 72 [2024-10-24 16:04:33,031 INFO L226 Difference]: Without dead ends: 72 [2024-10-24 16:04:33,031 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-24 16:04:33,031 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 14 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-24 16:04:33,031 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 63 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-24 16:04:33,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-10-24 16:04:33,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 60. [2024-10-24 16:04:33,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 47 states have (on average 1.5957446808510638) internal successors, (75), 59 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:33,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 75 transitions. [2024-10-24 16:04:33,036 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 75 transitions. Word has length 11 [2024-10-24 16:04:33,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:04:33,036 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 75 transitions. [2024-10-24 16:04:33,036 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) [2024-10-24 16:04:33,036 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 75 transitions. [2024-10-24 16:04:33,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-10-24 16:04:33,038 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:04:33,038 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:04:33,038 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-10-24 16:04:33,038 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-24 16:04:33,039 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:04:33,039 INFO L85 PathProgramCache]: Analyzing trace with hash 818951352, now seen corresponding path program 1 times [2024-10-24 16:04:33,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:04:33,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346937078] [2024-10-24 16:04:33,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:04:33,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:04:33,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:04:33,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:04:33,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:04:33,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346937078] [2024-10-24 16:04:33,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346937078] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 16:04:33,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 16:04:33,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-24 16:04:33,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651355561] [2024-10-24 16:04:33,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 16:04:33,079 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 16:04:33,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:04:33,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 16:04:33,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-24 16:04:33,079 INFO L87 Difference]: Start difference. First operand 60 states and 75 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:33,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:04:33,112 INFO L93 Difference]: Finished difference Result 57 states and 72 transitions. [2024-10-24 16:04:33,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-24 16:04:33,113 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-10-24 16:04:33,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:04:33,113 INFO L225 Difference]: With dead ends: 57 [2024-10-24 16:04:33,113 INFO L226 Difference]: Without dead ends: 57 [2024-10-24 16:04:33,113 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-24 16:04:33,114 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 23 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-24 16:04:33,114 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 49 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-24 16:04:33,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-10-24 16:04:33,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2024-10-24 16:04:33,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 47 states have (on average 1.5106382978723405) internal successors, (71), 55 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:33,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 71 transitions. [2024-10-24 16:04:33,115 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 71 transitions. Word has length 12 [2024-10-24 16:04:33,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:04:33,116 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 71 transitions. [2024-10-24 16:04:33,116 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:33,116 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 71 transitions. [2024-10-24 16:04:33,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-10-24 16:04:33,116 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:04:33,116 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:04:33,116 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-10-24 16:04:33,117 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-24 16:04:33,117 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:04:33,117 INFO L85 PathProgramCache]: Analyzing trace with hash 818951353, now seen corresponding path program 1 times [2024-10-24 16:04:33,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:04:33,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804992535] [2024-10-24 16:04:33,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:04:33,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:04:33,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:04:33,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:04:33,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:04:33,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804992535] [2024-10-24 16:04:33,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804992535] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 16:04:33,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 16:04:33,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-24 16:04:33,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109484961] [2024-10-24 16:04:33,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 16:04:33,187 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-24 16:04:33,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:04:33,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-24 16:04:33,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-10-24 16:04:33,188 INFO L87 Difference]: Start difference. First operand 56 states and 71 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:33,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:04:33,275 INFO L93 Difference]: Finished difference Result 75 states and 95 transitions. [2024-10-24 16:04:33,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-24 16:04:33,275 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-10-24 16:04:33,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:04:33,277 INFO L225 Difference]: With dead ends: 75 [2024-10-24 16:04:33,277 INFO L226 Difference]: Without dead ends: 75 [2024-10-24 16:04:33,277 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-10-24 16:04:33,277 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 39 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 16:04:33,278 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 85 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 16:04:33,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-10-24 16:04:33,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 66. [2024-10-24 16:04:33,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 57 states have (on average 1.5263157894736843) internal successors, (87), 65 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) [2024-10-24 16:04:33,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 87 transitions. [2024-10-24 16:04:33,279 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 87 transitions. Word has length 12 [2024-10-24 16:04:33,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:04:33,279 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 87 transitions. [2024-10-24 16:04:33,279 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:33,279 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 87 transitions. [2024-10-24 16:04:33,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-10-24 16:04:33,280 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:04:33,280 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:04:33,280 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-10-24 16:04:33,280 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-24 16:04:33,283 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:04:33,284 INFO L85 PathProgramCache]: Analyzing trace with hash -977041643, now seen corresponding path program 1 times [2024-10-24 16:04:33,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:04:33,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664874749] [2024-10-24 16:04:33,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:04:33,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:04:33,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:04:33,417 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 16:04:33,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:04:33,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664874749] [2024-10-24 16:04:33,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664874749] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 16:04:33,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 16:04:33,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-24 16:04:33,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329539518] [2024-10-24 16:04:33,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 16:04:33,418 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-24 16:04:33,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:04:33,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-24 16:04:33,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-10-24 16:04:33,418 INFO L87 Difference]: Start difference. First operand 66 states and 87 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:33,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:04:33,450 INFO L93 Difference]: Finished difference Result 73 states and 97 transitions. [2024-10-24 16:04:33,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-24 16:04:33,450 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-10-24 16:04:33,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:04:33,451 INFO L225 Difference]: With dead ends: 73 [2024-10-24 16:04:33,451 INFO L226 Difference]: Without dead ends: 73 [2024-10-24 16:04:33,451 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-10-24 16:04:33,452 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 17 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-24 16:04:33,452 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 58 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-24 16:04:33,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-10-24 16:04:33,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 68. [2024-10-24 16:04:33,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 59 states have (on average 1.5423728813559323) internal successors, (91), 67 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:33,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 91 transitions. [2024-10-24 16:04:33,454 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 91 transitions. Word has length 13 [2024-10-24 16:04:33,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:04:33,454 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 91 transitions. [2024-10-24 16:04:33,454 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:33,454 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 91 transitions. [2024-10-24 16:04:33,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-10-24 16:04:33,454 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:04:33,455 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:04:33,455 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-10-24 16:04:33,455 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-24 16:04:33,455 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:04:33,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1033235698, now seen corresponding path program 1 times [2024-10-24 16:04:33,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:04:33,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703927665] [2024-10-24 16:04:33,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:04:33,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:04:33,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:04:33,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:04:33,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:04:33,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703927665] [2024-10-24 16:04:33,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703927665] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:04:33,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776899111] [2024-10-24 16:04:33,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:04:33,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:04:33,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:04:33,641 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:04:33,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-24 16:04:33,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:04:33,692 INFO L255 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-24 16:04:33,693 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:04:33,731 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-24 16:04:33,767 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:04:33,767 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 16:04:33,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776899111] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 16:04:33,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-24 16:04:33,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 14 [2024-10-24 16:04:33,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712216563] [2024-10-24 16:04:33,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 16:04:33,768 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-24 16:04:33,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:04:33,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-24 16:04:33,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2024-10-24 16:04:33,769 INFO L87 Difference]: Start difference. First operand 68 states and 91 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:33,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:04:33,866 INFO L93 Difference]: Finished difference Result 88 states and 115 transitions. [2024-10-24 16:04:33,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-24 16:04:33,867 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-10-24 16:04:33,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:04:33,867 INFO L225 Difference]: With dead ends: 88 [2024-10-24 16:04:33,867 INFO L226 Difference]: Without dead ends: 88 [2024-10-24 16:04:33,867 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2024-10-24 16:04:33,868 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 32 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 16:04:33,868 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 142 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 16:04:33,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-10-24 16:04:33,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 76. [2024-10-24 16:04:33,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 67 states have (on average 1.492537313432836) internal successors, (100), 75 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:33,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 100 transitions. [2024-10-24 16:04:33,870 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 100 transitions. Word has length 14 [2024-10-24 16:04:33,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:04:33,870 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 100 transitions. [2024-10-24 16:04:33,870 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:33,870 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 100 transitions. [2024-10-24 16:04:33,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-10-24 16:04:33,871 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:04:33,872 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:04:33,885 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-24 16:04:34,072 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:04:34,072 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-24 16:04:34,073 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:04:34,073 INFO L85 PathProgramCache]: Analyzing trace with hash 365219645, now seen corresponding path program 1 times [2024-10-24 16:04:34,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:04:34,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646134416] [2024-10-24 16:04:34,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:04:34,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:04:34,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:04:34,280 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:04:34,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:04:34,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646134416] [2024-10-24 16:04:34,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646134416] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:04:34,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638705103] [2024-10-24 16:04:34,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:04:34,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:04:34,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:04:34,283 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:04:34,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-24 16:04:34,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:04:34,336 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-10-24 16:04:34,337 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:04:34,348 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 [2024-10-24 16:04:34,355 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 [2024-10-24 16:04:34,543 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:04:34,543 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:04:34,794 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:04:34,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638705103] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:04:34,794 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:04:34,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2024-10-24 16:04:34,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93968033] [2024-10-24 16:04:34,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:04:34,795 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-24 16:04:34,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:04:34,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-24 16:04:34,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2024-10-24 16:04:34,796 INFO L87 Difference]: Start difference. First operand 76 states and 100 transitions. Second operand has 23 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:35,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:04:35,153 INFO L93 Difference]: Finished difference Result 121 states and 163 transitions. [2024-10-24 16:04:35,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-24 16:04:35,153 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 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 [2024-10-24 16:04:35,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:04:35,154 INFO L225 Difference]: With dead ends: 121 [2024-10-24 16:04:35,154 INFO L226 Difference]: Without dead ends: 121 [2024-10-24 16:04:35,154 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=267, Invalid=663, Unknown=0, NotChecked=0, Total=930 [2024-10-24 16:04:35,155 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 47 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-24 16:04:35,155 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 135 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-24 16:04:35,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2024-10-24 16:04:35,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 85. [2024-10-24 16:04:35,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 76 states have (on average 1.5) internal successors, (114), 84 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:35,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 114 transitions. [2024-10-24 16:04:35,157 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 114 transitions. Word has length 15 [2024-10-24 16:04:35,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:04:35,157 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 114 transitions. [2024-10-24 16:04:35,157 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:35,157 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 114 transitions. [2024-10-24 16:04:35,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-10-24 16:04:35,158 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:04:35,158 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:04:35,171 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-24 16:04:35,361 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-10-24 16:04:35,361 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-24 16:04:35,362 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:04:35,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1782332613, now seen corresponding path program 1 times [2024-10-24 16:04:35,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:04:35,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204754741] [2024-10-24 16:04:35,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:04:35,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:04:35,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:04:35,568 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:04:35,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:04:35,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204754741] [2024-10-24 16:04:35,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204754741] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:04:35,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500821130] [2024-10-24 16:04:35,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:04:35,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:04:35,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:04:35,570 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:04:35,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-24 16:04:35,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:04:35,620 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-24 16:04:35,621 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:04:35,634 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 [2024-10-24 16:04:35,640 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 [2024-10-24 16:04:35,773 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:04:35,774 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:04:35,950 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:04:35,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500821130] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:04:35,951 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:04:35,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2024-10-24 16:04:35,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592652880] [2024-10-24 16:04:35,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:04:35,951 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-24 16:04:35,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:04:35,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-24 16:04:35,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=264, Unknown=0, NotChecked=0, Total=380 [2024-10-24 16:04:35,956 INFO L87 Difference]: Start difference. First operand 85 states and 114 transitions. Second operand has 20 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:36,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:04:36,306 INFO L93 Difference]: Finished difference Result 116 states and 153 transitions. [2024-10-24 16:04:36,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-24 16:04:36,307 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2024-10-24 16:04:36,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:04:36,308 INFO L225 Difference]: With dead ends: 116 [2024-10-24 16:04:36,308 INFO L226 Difference]: Without dead ends: 116 [2024-10-24 16:04:36,308 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=294, Invalid=636, Unknown=0, NotChecked=0, Total=930 [2024-10-24 16:04:36,308 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 49 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-24 16:04:36,309 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 121 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-24 16:04:36,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2024-10-24 16:04:36,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 88. [2024-10-24 16:04:36,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 79 states have (on average 1.5063291139240507) internal successors, (119), 87 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:36,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 119 transitions. [2024-10-24 16:04:36,310 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 119 transitions. Word has length 15 [2024-10-24 16:04:36,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:04:36,310 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 119 transitions. [2024-10-24 16:04:36,310 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:36,310 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 119 transitions. [2024-10-24 16:04:36,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-10-24 16:04:36,311 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:04:36,311 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:04:36,328 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-24 16:04:36,511 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:04:36,511 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-24 16:04:36,512 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:04:36,512 INFO L85 PathProgramCache]: Analyzing trace with hash 959023916, now seen corresponding path program 1 times [2024-10-24 16:04:36,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:04:36,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821979127] [2024-10-24 16:04:36,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:04:36,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:04:36,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:04:36,622 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:04:36,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:04:36,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821979127] [2024-10-24 16:04:36,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821979127] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:04:36,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937620504] [2024-10-24 16:04:36,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:04:36,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:04:36,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:04:36,624 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:04:36,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-24 16:04:36,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:04:36,679 INFO L255 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-10-24 16:04:36,680 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:04:36,743 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:04:36,744 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:04:36,791 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-10-24 16:04:36,841 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:04:36,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937620504] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:04:36,841 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:04:36,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 16 [2024-10-24 16:04:36,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651052916] [2024-10-24 16:04:36,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:04:36,842 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-24 16:04:36,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:04:36,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-24 16:04:36,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2024-10-24 16:04:36,843 INFO L87 Difference]: Start difference. First operand 88 states and 119 transitions. Second operand has 17 states, 16 states have (on average 2.4375) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:37,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:04:37,045 INFO L93 Difference]: Finished difference Result 121 states and 161 transitions. [2024-10-24 16:04:37,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-24 16:04:37,045 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.4375) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2024-10-24 16:04:37,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:04:37,046 INFO L225 Difference]: With dead ends: 121 [2024-10-24 16:04:37,046 INFO L226 Difference]: Without dead ends: 121 [2024-10-24 16:04:37,046 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2024-10-24 16:04:37,047 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 60 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-24 16:04:37,047 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 331 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 365 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-24 16:04:37,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2024-10-24 16:04:37,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 91. [2024-10-24 16:04:37,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 83 states have (on average 1.5060240963855422) internal successors, (125), 90 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) [2024-10-24 16:04:37,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 125 transitions. [2024-10-24 16:04:37,053 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 125 transitions. Word has length 16 [2024-10-24 16:04:37,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:04:37,053 INFO L471 AbstractCegarLoop]: Abstraction has 91 states and 125 transitions. [2024-10-24 16:04:37,053 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.4375) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:37,053 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 125 transitions. [2024-10-24 16:04:37,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-10-24 16:04:37,054 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:04:37,054 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:04:37,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-10-24 16:04:37,254 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:04:37,255 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-24 16:04:37,255 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:04:37,255 INFO L85 PathProgramCache]: Analyzing trace with hash 802015234, now seen corresponding path program 1 times [2024-10-24 16:04:37,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:04:37,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613617643] [2024-10-24 16:04:37,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:04:37,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:04:37,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:04:37,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:04:37,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:04:37,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613617643] [2024-10-24 16:04:37,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613617643] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 16:04:37,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 16:04:37,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-24 16:04:37,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696778229] [2024-10-24 16:04:37,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 16:04:37,288 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 16:04:37,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:04:37,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 16:04:37,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-24 16:04:37,288 INFO L87 Difference]: Start difference. First operand 91 states and 125 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) [2024-10-24 16:04:37,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:04:37,316 INFO L93 Difference]: Finished difference Result 90 states and 122 transitions. [2024-10-24 16:04:37,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-24 16:04:37,316 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 [2024-10-24 16:04:37,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:04:37,316 INFO L225 Difference]: With dead ends: 90 [2024-10-24 16:04:37,316 INFO L226 Difference]: Without dead ends: 90 [2024-10-24 16:04:37,317 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-24 16:04:37,317 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 14 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-24 16:04:37,317 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 62 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-24 16:04:37,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2024-10-24 16:04:37,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2024-10-24 16:04:37,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 83 states have (on average 1.4698795180722892) internal successors, (122), 89 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:37,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 122 transitions. [2024-10-24 16:04:37,320 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 122 transitions. Word has length 16 [2024-10-24 16:04:37,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:04:37,320 INFO L471 AbstractCegarLoop]: Abstraction has 90 states and 122 transitions. [2024-10-24 16:04:37,320 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) [2024-10-24 16:04:37,320 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 122 transitions. [2024-10-24 16:04:37,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-10-24 16:04:37,321 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:04:37,321 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:04:37,321 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-10-24 16:04:37,321 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-24 16:04:37,321 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:04:37,321 INFO L85 PathProgramCache]: Analyzing trace with hash 802015235, now seen corresponding path program 1 times [2024-10-24 16:04:37,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:04:37,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162091106] [2024-10-24 16:04:37,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:04:37,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:04:37,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:04:37,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:04:37,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:04:37,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162091106] [2024-10-24 16:04:37,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162091106] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 16:04:37,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 16:04:37,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-24 16:04:37,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472712403] [2024-10-24 16:04:37,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 16:04:37,397 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-24 16:04:37,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:04:37,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-24 16:04:37,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-10-24 16:04:37,397 INFO L87 Difference]: Start difference. First operand 90 states and 122 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:37,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:04:37,444 INFO L93 Difference]: Finished difference Result 105 states and 142 transitions. [2024-10-24 16:04:37,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-24 16:04:37,444 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2024-10-24 16:04:37,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:04:37,445 INFO L225 Difference]: With dead ends: 105 [2024-10-24 16:04:37,445 INFO L226 Difference]: Without dead ends: 105 [2024-10-24 16:04:37,445 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-10-24 16:04:37,445 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 16 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-24 16:04:37,446 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 79 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-24 16:04:37,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2024-10-24 16:04:37,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 99. [2024-10-24 16:04:37,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 92 states have (on average 1.4673913043478262) internal successors, (135), 98 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:37,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 135 transitions. [2024-10-24 16:04:37,447 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 135 transitions. Word has length 16 [2024-10-24 16:04:37,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:04:37,447 INFO L471 AbstractCegarLoop]: Abstraction has 99 states and 135 transitions. [2024-10-24 16:04:37,447 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:37,448 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 135 transitions. [2024-10-24 16:04:37,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-10-24 16:04:37,448 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:04:37,448 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:04:37,448 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-10-24 16:04:37,448 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-24 16:04:37,448 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:04:37,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1808105881, now seen corresponding path program 2 times [2024-10-24 16:04:37,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:04:37,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323796278] [2024-10-24 16:04:37,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:04:37,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:04:37,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:04:37,678 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:04:37,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:04:37,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323796278] [2024-10-24 16:04:37,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323796278] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:04:37,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294383615] [2024-10-24 16:04:37,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 16:04:37,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:04:37,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:04:37,679 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:04:37,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-24 16:04:37,730 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-24 16:04:37,730 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 16:04:37,731 INFO L255 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-24 16:04:37,732 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:04:37,764 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 [2024-10-24 16:04:37,770 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 [2024-10-24 16:04:37,882 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-24 16:04:37,882 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 16:04:37,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294383615] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 16:04:37,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-24 16:04:37,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 14 [2024-10-24 16:04:37,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112963501] [2024-10-24 16:04:37,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 16:04:37,882 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-24 16:04:37,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:04:37,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-24 16:04:37,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2024-10-24 16:04:37,883 INFO L87 Difference]: Start difference. First operand 99 states and 135 transitions. Second operand has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:37,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:04:37,974 INFO L93 Difference]: Finished difference Result 98 states and 132 transitions. [2024-10-24 16:04:37,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-24 16:04:37,974 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 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 17 [2024-10-24 16:04:37,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:04:37,974 INFO L225 Difference]: With dead ends: 98 [2024-10-24 16:04:37,975 INFO L226 Difference]: Without dead ends: 98 [2024-10-24 16:04:37,975 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2024-10-24 16:04:37,975 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 14 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-24 16:04:37,975 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 100 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-24 16:04:37,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2024-10-24 16:04:37,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 82. [2024-10-24 16:04:37,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 76 states have (on average 1.4342105263157894) internal successors, (109), 81 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:37,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 109 transitions. [2024-10-24 16:04:37,977 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 109 transitions. Word has length 17 [2024-10-24 16:04:37,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:04:37,977 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 109 transitions. [2024-10-24 16:04:37,977 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:37,977 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 109 transitions. [2024-10-24 16:04:37,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-10-24 16:04:37,977 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:04:37,977 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:04:37,990 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-10-24 16:04:38,178 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:04:38,178 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-24 16:04:38,178 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:04:38,179 INFO L85 PathProgramCache]: Analyzing trace with hash -1795984731, now seen corresponding path program 2 times [2024-10-24 16:04:38,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:04:38,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243342799] [2024-10-24 16:04:38,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:04:38,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:04:38,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:04:38,412 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:04:38,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:04:38,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243342799] [2024-10-24 16:04:38,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243342799] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:04:38,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467777726] [2024-10-24 16:04:38,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 16:04:38,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:04:38,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:04:38,415 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:04:38,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-24 16:04:38,478 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 16:04:38,478 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 16:04:38,479 INFO L255 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-10-24 16:04:38,480 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:04:38,535 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-10-24 16:04:38,591 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:04:38,591 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:04:38,600 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 18 treesize of output 16 [2024-10-24 16:04:38,602 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 20 treesize of output 16 [2024-10-24 16:04:38,643 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:04:38,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467777726] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:04:38,644 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:04:38,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 20 [2024-10-24 16:04:38,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633559297] [2024-10-24 16:04:38,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:04:38,644 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-24 16:04:38,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:04:38,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-24 16:04:38,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2024-10-24 16:04:38,645 INFO L87 Difference]: Start difference. First operand 82 states and 109 transitions. Second operand has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:39,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:04:39,220 INFO L93 Difference]: Finished difference Result 245 states and 326 transitions. [2024-10-24 16:04:39,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-10-24 16:04:39,220 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2024-10-24 16:04:39,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:04:39,221 INFO L225 Difference]: With dead ends: 245 [2024-10-24 16:04:39,221 INFO L226 Difference]: Without dead ends: 245 [2024-10-24 16:04:39,221 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=117, Invalid=813, Unknown=0, NotChecked=0, Total=930 [2024-10-24 16:04:39,222 INFO L432 NwaCegarLoop]: 49 mSDtfsCounter, 138 mSDsluCounter, 595 mSDsCounter, 0 mSdLazyCounter, 728 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 644 SdHoareTripleChecker+Invalid, 741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-24 16:04:39,222 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 644 Invalid, 741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 728 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-24 16:04:39,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2024-10-24 16:04:39,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 148. [2024-10-24 16:04:39,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 142 states have (on average 1.3943661971830985) internal successors, (198), 147 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:39,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 198 transitions. [2024-10-24 16:04:39,225 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 198 transitions. Word has length 18 [2024-10-24 16:04:39,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:04:39,225 INFO L471 AbstractCegarLoop]: Abstraction has 148 states and 198 transitions. [2024-10-24 16:04:39,225 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:39,225 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 198 transitions. [2024-10-24 16:04:39,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-10-24 16:04:39,226 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:04:39,226 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] [2024-10-24 16:04:39,239 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-24 16:04:39,426 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,SelfDestructingSolverStorable23 [2024-10-24 16:04:39,426 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-24 16:04:39,426 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:04:39,426 INFO L85 PathProgramCache]: Analyzing trace with hash -1812991413, now seen corresponding path program 1 times [2024-10-24 16:04:39,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:04:39,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618793179] [2024-10-24 16:04:39,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:04:39,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:04:39,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:04:39,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:04:39,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:04:39,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618793179] [2024-10-24 16:04:39,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618793179] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 16:04:39,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 16:04:39,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-24 16:04:39,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876146062] [2024-10-24 16:04:39,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 16:04:39,466 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-24 16:04:39,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:04:39,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-24 16:04:39,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-24 16:04:39,467 INFO L87 Difference]: Start difference. First operand 148 states and 198 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:39,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:04:39,494 INFO L93 Difference]: Finished difference Result 149 states and 194 transitions. [2024-10-24 16:04:39,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-24 16:04:39,494 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2024-10-24 16:04:39,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:04:39,495 INFO L225 Difference]: With dead ends: 149 [2024-10-24 16:04:39,495 INFO L226 Difference]: Without dead ends: 149 [2024-10-24 16:04:39,495 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-24 16:04:39,495 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 16 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-24 16:04:39,495 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 88 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-24 16:04:39,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2024-10-24 16:04:39,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 141. [2024-10-24 16:04:39,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 135 states have (on average 1.3555555555555556) internal successors, (183), 140 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:39,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 183 transitions. [2024-10-24 16:04:39,497 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 183 transitions. Word has length 20 [2024-10-24 16:04:39,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:04:39,497 INFO L471 AbstractCegarLoop]: Abstraction has 141 states and 183 transitions. [2024-10-24 16:04:39,497 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:39,497 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 183 transitions. [2024-10-24 16:04:39,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-10-24 16:04:39,498 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:04:39,498 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:04:39,498 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-10-24 16:04:39,498 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-24 16:04:39,499 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:04:39,499 INFO L85 PathProgramCache]: Analyzing trace with hash -435347487, now seen corresponding path program 1 times [2024-10-24 16:04:39,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:04:39,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063241009] [2024-10-24 16:04:39,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:04:39,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:04:39,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:04:39,623 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:04:39,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:04:39,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063241009] [2024-10-24 16:04:39,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063241009] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:04:39,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845177304] [2024-10-24 16:04:39,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:04:39,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:04:39,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:04:39,625 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:04:39,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-24 16:04:39,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:04:39,692 INFO L255 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-10-24 16:04:39,693 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:04:39,771 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:04:39,771 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:04:39,854 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 [2024-10-24 16:04:39,879 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:04:39,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845177304] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:04:39,880 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:04:39,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2024-10-24 16:04:39,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920816443] [2024-10-24 16:04:39,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:04:39,880 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-24 16:04:39,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:04:39,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-24 16:04:39,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2024-10-24 16:04:39,881 INFO L87 Difference]: Start difference. First operand 141 states and 183 transitions. Second operand has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:40,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:04:40,086 INFO L93 Difference]: Finished difference Result 207 states and 269 transitions. [2024-10-24 16:04:40,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-24 16:04:40,087 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2024-10-24 16:04:40,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:04:40,087 INFO L225 Difference]: With dead ends: 207 [2024-10-24 16:04:40,087 INFO L226 Difference]: Without dead ends: 207 [2024-10-24 16:04:40,088 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2024-10-24 16:04:40,088 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 62 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-24 16:04:40,088 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 415 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 527 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-24 16:04:40,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2024-10-24 16:04:40,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 118. [2024-10-24 16:04:40,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 112 states have (on average 1.3571428571428572) internal successors, (152), 117 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:40,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 152 transitions. [2024-10-24 16:04:40,091 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 152 transitions. Word has length 20 [2024-10-24 16:04:40,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:04:40,091 INFO L471 AbstractCegarLoop]: Abstraction has 118 states and 152 transitions. [2024-10-24 16:04:40,091 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:40,091 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 152 transitions. [2024-10-24 16:04:40,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-10-24 16:04:40,091 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:04:40,091 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:04:40,104 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-10-24 16:04:40,292 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,SelfDestructingSolverStorable25 [2024-10-24 16:04:40,292 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-24 16:04:40,292 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:04:40,292 INFO L85 PathProgramCache]: Analyzing trace with hash -88523788, now seen corresponding path program 1 times [2024-10-24 16:04:40,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:04:40,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471318599] [2024-10-24 16:04:40,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:04:40,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:04:40,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:04:40,340 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:04:40,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:04:40,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471318599] [2024-10-24 16:04:40,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471318599] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:04:40,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264863920] [2024-10-24 16:04:40,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:04:40,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:04:40,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:04:40,342 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:04:40,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-24 16:04:40,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:04:40,405 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-24 16:04:40,406 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:04:40,425 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:04:40,425 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:04:40,441 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:04:40,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264863920] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:04:40,442 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:04:40,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 6 [2024-10-24 16:04:40,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067726463] [2024-10-24 16:04:40,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:04:40,442 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-24 16:04:40,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:04:40,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-24 16:04:40,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-10-24 16:04:40,443 INFO L87 Difference]: Start difference. First operand 118 states and 152 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:40,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:04:40,484 INFO L93 Difference]: Finished difference Result 193 states and 241 transitions. [2024-10-24 16:04:40,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-24 16:04:40,486 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2024-10-24 16:04:40,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:04:40,487 INFO L225 Difference]: With dead ends: 193 [2024-10-24 16:04:40,487 INFO L226 Difference]: Without dead ends: 193 [2024-10-24 16:04:40,487 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-10-24 16:04:40,488 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 21 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-24 16:04:40,488 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 138 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-24 16:04:40,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2024-10-24 16:04:40,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 170. [2024-10-24 16:04:40,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 164 states have (on average 1.3231707317073171) internal successors, (217), 169 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:40,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 217 transitions. [2024-10-24 16:04:40,491 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 217 transitions. Word has length 21 [2024-10-24 16:04:40,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:04:40,491 INFO L471 AbstractCegarLoop]: Abstraction has 170 states and 217 transitions. [2024-10-24 16:04:40,491 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:40,491 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 217 transitions. [2024-10-24 16:04:40,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-10-24 16:04:40,492 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:04:40,492 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:04:40,504 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-10-24 16:04:40,692 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,SelfDestructingSolverStorable26 [2024-10-24 16:04:40,693 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-24 16:04:40,693 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:04:40,693 INFO L85 PathProgramCache]: Analyzing trace with hash -2082668494, now seen corresponding path program 1 times [2024-10-24 16:04:40,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:04:40,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226397071] [2024-10-24 16:04:40,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:04:40,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:04:40,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:04:40,803 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:04:40,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:04:40,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226397071] [2024-10-24 16:04:40,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226397071] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 16:04:40,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 16:04:40,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-10-24 16:04:40,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012092495] [2024-10-24 16:04:40,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 16:04:40,805 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-24 16:04:40,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:04:40,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-24 16:04:40,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-10-24 16:04:40,806 INFO L87 Difference]: Start difference. First operand 170 states and 217 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:40,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:04:40,853 INFO L93 Difference]: Finished difference Result 242 states and 298 transitions. [2024-10-24 16:04:40,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-24 16:04:40,853 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2024-10-24 16:04:40,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:04:40,854 INFO L225 Difference]: With dead ends: 242 [2024-10-24 16:04:40,854 INFO L226 Difference]: Without dead ends: 242 [2024-10-24 16:04:40,854 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-10-24 16:04:40,854 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 7 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-24 16:04:40,855 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 154 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-24 16:04:40,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2024-10-24 16:04:40,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 186. [2024-10-24 16:04:40,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 180 states have (on average 1.3055555555555556) internal successors, (235), 185 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:40,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 235 transitions. [2024-10-24 16:04:40,857 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 235 transitions. Word has length 21 [2024-10-24 16:04:40,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:04:40,858 INFO L471 AbstractCegarLoop]: Abstraction has 186 states and 235 transitions. [2024-10-24 16:04:40,858 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:40,858 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 235 transitions. [2024-10-24 16:04:40,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-10-24 16:04:40,858 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:04:40,858 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:04:40,858 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-10-24 16:04:40,858 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-24 16:04:40,859 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:04:40,860 INFO L85 PathProgramCache]: Analyzing trace with hash 668815831, now seen corresponding path program 2 times [2024-10-24 16:04:40,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:04:40,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967127971] [2024-10-24 16:04:40,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:04:40,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:04:40,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:04:40,967 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-24 16:04:40,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:04:40,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967127971] [2024-10-24 16:04:40,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967127971] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 16:04:40,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 16:04:40,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-24 16:04:40,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351165304] [2024-10-24 16:04:40,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 16:04:40,968 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-24 16:04:40,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:04:40,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-24 16:04:40,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-10-24 16:04:40,968 INFO L87 Difference]: Start difference. First operand 186 states and 235 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 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) [2024-10-24 16:04:40,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:04:40,997 INFO L93 Difference]: Finished difference Result 185 states and 233 transitions. [2024-10-24 16:04:40,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-24 16:04:40,997 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 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 21 [2024-10-24 16:04:40,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:04:40,998 INFO L225 Difference]: With dead ends: 185 [2024-10-24 16:04:40,998 INFO L226 Difference]: Without dead ends: 185 [2024-10-24 16:04:40,998 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-10-24 16:04:40,998 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 2 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-24 16:04:40,998 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 62 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-24 16:04:40,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2024-10-24 16:04:41,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 163. [2024-10-24 16:04:41,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 158 states have (on average 1.2848101265822784) internal successors, (203), 162 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:41,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 203 transitions. [2024-10-24 16:04:41,001 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 203 transitions. Word has length 21 [2024-10-24 16:04:41,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:04:41,001 INFO L471 AbstractCegarLoop]: Abstraction has 163 states and 203 transitions. [2024-10-24 16:04:41,001 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 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) [2024-10-24 16:04:41,001 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 203 transitions. [2024-10-24 16:04:41,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-10-24 16:04:41,002 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:04:41,002 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:04:41,003 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-10-24 16:04:41,003 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-24 16:04:41,003 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:04:41,003 INFO L85 PathProgramCache]: Analyzing trace with hash 523355060, now seen corresponding path program 1 times [2024-10-24 16:04:41,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:04:41,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489989753] [2024-10-24 16:04:41,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:04:41,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:04:41,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:04:41,125 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:04:41,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:04:41,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489989753] [2024-10-24 16:04:41,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489989753] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 16:04:41,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 16:04:41,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-10-24 16:04:41,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809254146] [2024-10-24 16:04:41,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 16:04:41,126 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-24 16:04:41,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:04:41,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-24 16:04:41,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-10-24 16:04:41,127 INFO L87 Difference]: Start difference. First operand 163 states and 203 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:41,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:04:41,176 INFO L93 Difference]: Finished difference Result 182 states and 222 transitions. [2024-10-24 16:04:41,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-24 16:04:41,176 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2024-10-24 16:04:41,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:04:41,177 INFO L225 Difference]: With dead ends: 182 [2024-10-24 16:04:41,177 INFO L226 Difference]: Without dead ends: 182 [2024-10-24 16:04:41,177 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 [2024-10-24 16:04:41,178 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 13 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-24 16:04:41,178 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 126 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-24 16:04:41,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2024-10-24 16:04:41,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 151. [2024-10-24 16:04:41,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 146 states have (on average 1.3082191780821917) internal successors, (191), 150 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:41,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 191 transitions. [2024-10-24 16:04:41,192 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 191 transitions. Word has length 21 [2024-10-24 16:04:41,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:04:41,192 INFO L471 AbstractCegarLoop]: Abstraction has 151 states and 191 transitions. [2024-10-24 16:04:41,192 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:41,192 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 191 transitions. [2024-10-24 16:04:41,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-10-24 16:04:41,192 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:04:41,192 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:04:41,192 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-10-24 16:04:41,192 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-24 16:04:41,193 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:04:41,193 INFO L85 PathProgramCache]: Analyzing trace with hash -68162920, now seen corresponding path program 3 times [2024-10-24 16:04:41,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:04:41,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564083261] [2024-10-24 16:04:41,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:04:41,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:04:41,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:04:41,455 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:04:41,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:04:41,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564083261] [2024-10-24 16:04:41,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564083261] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:04:41,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359585313] [2024-10-24 16:04:41,455 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-24 16:04:41,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:04:41,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:04:41,456 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:04:41,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-24 16:04:41,523 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-10-24 16:04:41,523 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 16:04:41,524 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-10-24 16:04:41,527 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:04:41,589 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-10-24 16:04:41,662 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:04:41,662 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:04:41,676 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 18 treesize of output 16 [2024-10-24 16:04:41,678 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 20 treesize of output 16 [2024-10-24 16:04:41,756 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:04:41,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359585313] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:04:41,756 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:04:41,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 23 [2024-10-24 16:04:41,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374041847] [2024-10-24 16:04:41,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:04:41,756 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-24 16:04:41,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:04:41,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-24 16:04:41,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2024-10-24 16:04:41,757 INFO L87 Difference]: Start difference. First operand 151 states and 191 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:42,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:04:42,532 INFO L93 Difference]: Finished difference Result 397 states and 480 transitions. [2024-10-24 16:04:42,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-10-24 16:04:42,533 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-10-24 16:04:42,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:04:42,534 INFO L225 Difference]: With dead ends: 397 [2024-10-24 16:04:42,534 INFO L226 Difference]: Without dead ends: 397 [2024-10-24 16:04:42,534 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=148, Invalid=1258, Unknown=0, NotChecked=0, Total=1406 [2024-10-24 16:04:42,535 INFO L432 NwaCegarLoop]: 62 mSDtfsCounter, 155 mSDsluCounter, 1030 mSDsCounter, 0 mSdLazyCounter, 1220 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 1092 SdHoareTripleChecker+Invalid, 1242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-24 16:04:42,535 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 1092 Invalid, 1242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1220 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-24 16:04:42,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2024-10-24 16:04:42,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 197. [2024-10-24 16:04:42,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 192 states have (on average 1.3072916666666667) internal successors, (251), 196 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:42,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 251 transitions. [2024-10-24 16:04:42,542 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 251 transitions. Word has length 22 [2024-10-24 16:04:42,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:04:42,542 INFO L471 AbstractCegarLoop]: Abstraction has 197 states and 251 transitions. [2024-10-24 16:04:42,542 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:42,542 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 251 transitions. [2024-10-24 16:04:42,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-10-24 16:04:42,542 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:04:42,542 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] [2024-10-24 16:04:42,556 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-10-24 16:04:42,743 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,SelfDestructingSolverStorable30 [2024-10-24 16:04:42,743 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-24 16:04:42,743 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:04:42,743 INFO L85 PathProgramCache]: Analyzing trace with hash 1549567307, now seen corresponding path program 1 times [2024-10-24 16:04:42,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:04:42,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000481394] [2024-10-24 16:04:42,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:04:42,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:04:42,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:04:42,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:04:42,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:04:42,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000481394] [2024-10-24 16:04:42,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000481394] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 16:04:42,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 16:04:42,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 16:04:42,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517765946] [2024-10-24 16:04:42,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 16:04:42,832 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 16:04:42,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:04:42,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 16:04:42,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-24 16:04:42,834 INFO L87 Difference]: Start difference. First operand 197 states and 251 transitions. Second operand has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:42,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:04:42,855 INFO L93 Difference]: Finished difference Result 196 states and 250 transitions. [2024-10-24 16:04:42,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-24 16:04:42,858 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-10-24 16:04:42,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:04:42,859 INFO L225 Difference]: With dead ends: 196 [2024-10-24 16:04:42,859 INFO L226 Difference]: Without dead ends: 140 [2024-10-24 16:04:42,859 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-24 16:04:42,859 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 15 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-24 16:04:42,859 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 48 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-24 16:04:42,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2024-10-24 16:04:42,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2024-10-24 16:04:42,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 136 states have (on average 1.1985294117647058) internal successors, (163), 139 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:42,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 163 transitions. [2024-10-24 16:04:42,863 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 163 transitions. Word has length 22 [2024-10-24 16:04:42,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:04:42,863 INFO L471 AbstractCegarLoop]: Abstraction has 140 states and 163 transitions. [2024-10-24 16:04:42,864 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:42,864 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 163 transitions. [2024-10-24 16:04:42,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-10-24 16:04:42,864 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:04:42,864 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] [2024-10-24 16:04:42,864 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-10-24 16:04:42,864 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-24 16:04:42,865 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:04:42,865 INFO L85 PathProgramCache]: Analyzing trace with hash -823025606, now seen corresponding path program 1 times [2024-10-24 16:04:42,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:04:42,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316261378] [2024-10-24 16:04:42,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:04:42,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:04:42,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:04:42,999 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 16:04:42,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:04:43,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316261378] [2024-10-24 16:04:43,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316261378] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 16:04:43,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 16:04:43,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-10-24 16:04:43,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074371990] [2024-10-24 16:04:43,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 16:04:43,002 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-24 16:04:43,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:04:43,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-24 16:04:43,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-10-24 16:04:43,002 INFO L87 Difference]: Start difference. First operand 140 states and 163 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 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) [2024-10-24 16:04:43,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:04:43,050 INFO L93 Difference]: Finished difference Result 203 states and 233 transitions. [2024-10-24 16:04:43,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-24 16:04:43,050 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 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 [2024-10-24 16:04:43,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:04:43,051 INFO L225 Difference]: With dead ends: 203 [2024-10-24 16:04:43,051 INFO L226 Difference]: Without dead ends: 171 [2024-10-24 16:04:43,051 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-10-24 16:04:43,051 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 11 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-24 16:04:43,052 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 139 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-24 16:04:43,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2024-10-24 16:04:43,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 144. [2024-10-24 16:04:43,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 140 states have (on average 1.207142857142857) internal successors, (169), 143 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:43,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 169 transitions. [2024-10-24 16:04:43,054 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 169 transitions. Word has length 23 [2024-10-24 16:04:43,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:04:43,054 INFO L471 AbstractCegarLoop]: Abstraction has 144 states and 169 transitions. [2024-10-24 16:04:43,054 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 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) [2024-10-24 16:04:43,054 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 169 transitions. [2024-10-24 16:04:43,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-10-24 16:04:43,054 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:04:43,055 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:04:43,055 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-10-24 16:04:43,055 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-24 16:04:43,055 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:04:43,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1581737516, now seen corresponding path program 2 times [2024-10-24 16:04:43,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:04:43,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654072832] [2024-10-24 16:04:43,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:04:43,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:04:43,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:04:43,224 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:04:43,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:04:43,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654072832] [2024-10-24 16:04:43,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654072832] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:04:43,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582565540] [2024-10-24 16:04:43,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 16:04:43,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:04:43,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:04:43,226 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:04:43,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-24 16:04:43,295 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 16:04:43,295 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 16:04:43,297 INFO L255 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-10-24 16:04:43,299 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:04:43,436 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:04:43,437 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:04:43,538 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-10-24 16:04:43,645 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:04:43,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582565540] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:04:43,646 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:04:43,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2024-10-24 16:04:43,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186429299] [2024-10-24 16:04:43,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:04:43,647 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-10-24 16:04:43,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:04:43,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-10-24 16:04:43,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2024-10-24 16:04:43,648 INFO L87 Difference]: Start difference. First operand 144 states and 169 transitions. Second operand has 26 states, 25 states have (on average 2.36) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:43,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:04:43,910 INFO L93 Difference]: Finished difference Result 198 states and 226 transitions. [2024-10-24 16:04:43,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-24 16:04:43,910 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.36) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2024-10-24 16:04:43,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:04:43,911 INFO L225 Difference]: With dead ends: 198 [2024-10-24 16:04:43,911 INFO L226 Difference]: Without dead ends: 196 [2024-10-24 16:04:43,911 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2024-10-24 16:04:43,912 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 52 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 635 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-24 16:04:43,912 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 458 Invalid, 644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 635 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-24 16:04:43,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2024-10-24 16:04:43,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 141. [2024-10-24 16:04:43,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 137 states have (on average 1.218978102189781) internal successors, (167), 140 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:43,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 167 transitions. [2024-10-24 16:04:43,914 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 167 transitions. Word has length 24 [2024-10-24 16:04:43,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:04:43,914 INFO L471 AbstractCegarLoop]: Abstraction has 141 states and 167 transitions. [2024-10-24 16:04:43,914 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.36) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:43,914 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 167 transitions. [2024-10-24 16:04:43,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-10-24 16:04:43,915 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:04:43,915 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] [2024-10-24 16:04:43,928 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-10-24 16:04:44,115 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,SelfDestructingSolverStorable33 [2024-10-24 16:04:44,116 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-24 16:04:44,116 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:04:44,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1966161302, now seen corresponding path program 1 times [2024-10-24 16:04:44,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:04:44,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332540682] [2024-10-24 16:04:44,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:04:44,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:04:44,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:04:44,267 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 16:04:44,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:04:44,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332540682] [2024-10-24 16:04:44,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332540682] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:04:44,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111315621] [2024-10-24 16:04:44,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:04:44,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:04:44,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:04:44,270 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:04:44,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-24 16:04:44,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:04:44,342 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-24 16:04:44,343 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:04:44,404 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 16:04:44,404 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:04:44,491 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-10-24 16:04:44,509 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 16:04:44,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111315621] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:04:44,509 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:04:44,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 17 [2024-10-24 16:04:44,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778464536] [2024-10-24 16:04:44,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:04:44,510 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-24 16:04:44,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:04:44,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-24 16:04:44,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2024-10-24 16:04:44,511 INFO L87 Difference]: Start difference. First operand 141 states and 167 transitions. Second operand has 18 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:44,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:04:44,625 INFO L93 Difference]: Finished difference Result 164 states and 188 transitions. [2024-10-24 16:04:44,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-24 16:04:44,626 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2024-10-24 16:04:44,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:04:44,626 INFO L225 Difference]: With dead ends: 164 [2024-10-24 16:04:44,626 INFO L226 Difference]: Without dead ends: 164 [2024-10-24 16:04:44,627 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2024-10-24 16:04:44,627 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 22 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 16:04:44,627 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 151 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 16:04:44,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2024-10-24 16:04:44,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 156. [2024-10-24 16:04:44,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 152 states have (on average 1.1973684210526316) internal successors, (182), 155 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:44,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 182 transitions. [2024-10-24 16:04:44,630 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 182 transitions. Word has length 25 [2024-10-24 16:04:44,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:04:44,630 INFO L471 AbstractCegarLoop]: Abstraction has 156 states and 182 transitions. [2024-10-24 16:04:44,630 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:44,630 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 182 transitions. [2024-10-24 16:04:44,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-10-24 16:04:44,631 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:04:44,631 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:04:44,646 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-10-24 16:04:44,835 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,SelfDestructingSolverStorable34 [2024-10-24 16:04:44,835 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-24 16:04:44,836 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:04:44,836 INFO L85 PathProgramCache]: Analyzing trace with hash -2120858421, now seen corresponding path program 4 times [2024-10-24 16:04:44,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:04:44,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595387737] [2024-10-24 16:04:44,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:04:44,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:04:44,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:04:45,153 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:04:45,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:04:45,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595387737] [2024-10-24 16:04:45,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595387737] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:04:45,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519488730] [2024-10-24 16:04:45,155 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-24 16:04:45,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:04:45,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:04:45,156 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:04:45,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-24 16:04:45,237 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-24 16:04:45,237 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 16:04:45,238 INFO L255 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-10-24 16:04:45,240 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:04:45,332 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-10-24 16:04:45,445 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:04:45,446 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:04:45,464 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 18 treesize of output 16 [2024-10-24 16:04:45,466 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 20 treesize of output 16 [2024-10-24 16:04:45,531 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:04:45,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519488730] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:04:45,531 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:04:45,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 14] total 27 [2024-10-24 16:04:45,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325925092] [2024-10-24 16:04:45,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:04:45,532 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-10-24 16:04:45,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:04:45,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-10-24 16:04:45,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=640, Unknown=0, NotChecked=0, Total=702 [2024-10-24 16:04:45,532 INFO L87 Difference]: Start difference. First operand 156 states and 182 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:46,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:04:46,254 INFO L93 Difference]: Finished difference Result 309 states and 346 transitions. [2024-10-24 16:04:46,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-10-24 16:04:46,254 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2024-10-24 16:04:46,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:04:46,255 INFO L225 Difference]: With dead ends: 309 [2024-10-24 16:04:46,255 INFO L226 Difference]: Without dead ends: 255 [2024-10-24 16:04:46,256 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=183, Invalid=1887, Unknown=0, NotChecked=0, Total=2070 [2024-10-24 16:04:46,256 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 85 mSDsluCounter, 818 mSDsCounter, 0 mSdLazyCounter, 1071 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 866 SdHoareTripleChecker+Invalid, 1086 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1071 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-24 16:04:46,256 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 866 Invalid, 1086 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1071 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-24 16:04:46,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2024-10-24 16:04:46,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 190. [2024-10-24 16:04:46,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 186 states have (on average 1.1827956989247312) internal successors, (220), 189 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:46,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 220 transitions. [2024-10-24 16:04:46,259 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 220 transitions. Word has length 26 [2024-10-24 16:04:46,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:04:46,259 INFO L471 AbstractCegarLoop]: Abstraction has 190 states and 220 transitions. [2024-10-24 16:04:46,259 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:46,259 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 220 transitions. [2024-10-24 16:04:46,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-10-24 16:04:46,259 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:04:46,260 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:04:46,273 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-10-24 16:04:46,463 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:04:46,463 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-24 16:04:46,464 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:04:46,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1464011257, now seen corresponding path program 3 times [2024-10-24 16:04:46,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:04:46,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090985399] [2024-10-24 16:04:46,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:04:46,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:04:46,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:04:46,675 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:04:46,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:04:46,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090985399] [2024-10-24 16:04:46,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090985399] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:04:46,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599686678] [2024-10-24 16:04:46,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-24 16:04:46,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:04:46,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:04:46,677 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:04:46,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-10-24 16:04:46,769 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-10-24 16:04:46,770 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 16:04:46,771 INFO L255 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-10-24 16:04:46,775 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:04:46,952 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:04:46,952 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:04:47,128 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 8 treesize of output 6 [2024-10-24 16:04:47,195 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:04:47,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599686678] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:04:47,196 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:04:47,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 31 [2024-10-24 16:04:47,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588374643] [2024-10-24 16:04:47,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:04:47,196 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-10-24 16:04:47,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:04:47,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-10-24 16:04:47,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=842, Unknown=0, NotChecked=0, Total=992 [2024-10-24 16:04:47,197 INFO L87 Difference]: Start difference. First operand 190 states and 220 transitions. Second operand has 32 states, 31 states have (on average 2.032258064516129) internal successors, (63), 32 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) [2024-10-24 16:04:47,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:04:47,440 INFO L93 Difference]: Finished difference Result 268 states and 302 transitions. [2024-10-24 16:04:47,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-24 16:04:47,440 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.032258064516129) internal successors, (63), 32 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 28 [2024-10-24 16:04:47,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:04:47,441 INFO L225 Difference]: With dead ends: 268 [2024-10-24 16:04:47,441 INFO L226 Difference]: Without dead ends: 266 [2024-10-24 16:04:47,442 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=161, Invalid=895, Unknown=0, NotChecked=0, Total=1056 [2024-10-24 16:04:47,442 INFO L432 NwaCegarLoop]: 42 mSDtfsCounter, 125 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-24 16:04:47,442 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 404 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 615 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-24 16:04:47,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2024-10-24 16:04:47,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 190. [2024-10-24 16:04:47,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 186 states have (on average 1.1881720430107527) internal successors, (221), 189 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:47,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 221 transitions. [2024-10-24 16:04:47,445 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 221 transitions. Word has length 28 [2024-10-24 16:04:47,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:04:47,445 INFO L471 AbstractCegarLoop]: Abstraction has 190 states and 221 transitions. [2024-10-24 16:04:47,445 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.032258064516129) internal successors, (63), 32 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) [2024-10-24 16:04:47,445 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 221 transitions. [2024-10-24 16:04:47,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-10-24 16:04:47,445 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:04:47,445 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] [2024-10-24 16:04:47,458 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-10-24 16:04:47,646 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-10-24 16:04:47,646 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-24 16:04:47,646 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:04:47,646 INFO L85 PathProgramCache]: Analyzing trace with hash -1220261699, now seen corresponding path program 1 times [2024-10-24 16:04:47,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:04:47,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17322292] [2024-10-24 16:04:47,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:04:47,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:04:47,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:04:47,909 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 16:04:47,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:04:47,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17322292] [2024-10-24 16:04:47,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17322292] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:04:47,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157151442] [2024-10-24 16:04:47,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:04:47,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:04:47,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:04:47,911 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:04:47,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-10-24 16:04:47,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:04:47,992 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-10-24 16:04:47,994 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:04:48,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-24 16:04:48,016 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2024-10-24 16:04:48,022 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-10-24 16:04:48,395 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 16:04:48,395 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:04:48,731 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 16:04:48,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157151442] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:04:48,732 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:04:48,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 10] total 29 [2024-10-24 16:04:48,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033228430] [2024-10-24 16:04:48,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:04:48,732 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-10-24 16:04:48,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:04:48,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-10-24 16:04:48,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=750, Unknown=0, NotChecked=0, Total=870 [2024-10-24 16:04:48,733 INFO L87 Difference]: Start difference. First operand 190 states and 221 transitions. Second operand has 30 states, 29 states have (on average 2.793103448275862) internal successors, (81), 30 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) [2024-10-24 16:04:49,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:04:49,327 INFO L93 Difference]: Finished difference Result 319 states and 359 transitions. [2024-10-24 16:04:49,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-24 16:04:49,328 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.793103448275862) internal successors, (81), 30 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) Word has length 28 [2024-10-24 16:04:49,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:04:49,328 INFO L225 Difference]: With dead ends: 319 [2024-10-24 16:04:49,329 INFO L226 Difference]: Without dead ends: 311 [2024-10-24 16:04:49,329 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=278, Invalid=1614, Unknown=0, NotChecked=0, Total=1892 [2024-10-24 16:04:49,329 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 89 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-24 16:04:49,329 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 213 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-24 16:04:49,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2024-10-24 16:04:49,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 229. [2024-10-24 16:04:49,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 225 states have (on average 1.1822222222222223) internal successors, (266), 228 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:49,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 266 transitions. [2024-10-24 16:04:49,333 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 266 transitions. Word has length 28 [2024-10-24 16:04:49,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:04:49,334 INFO L471 AbstractCegarLoop]: Abstraction has 229 states and 266 transitions. [2024-10-24 16:04:49,334 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.793103448275862) internal successors, (81), 30 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) [2024-10-24 16:04:49,334 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 266 transitions. [2024-10-24 16:04:49,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-10-24 16:04:49,335 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:04:49,335 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:04:49,349 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-10-24 16:04:49,538 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-10-24 16:04:49,538 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-24 16:04:49,539 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:04:49,539 INFO L85 PathProgramCache]: Analyzing trace with hash -88772290, now seen corresponding path program 5 times [2024-10-24 16:04:49,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:04:49,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308491366] [2024-10-24 16:04:49,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:04:49,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:04:49,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:04:49,943 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:04:49,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:04:49,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308491366] [2024-10-24 16:04:49,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308491366] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:04:49,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051513767] [2024-10-24 16:04:49,944 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-24 16:04:49,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:04:49,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:04:49,946 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:04:49,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-10-24 16:04:50,041 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-10-24 16:04:50,042 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 16:04:50,046 INFO L255 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 58 conjuncts are in the unsatisfiable core [2024-10-24 16:04:50,048 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:04:50,172 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 13 treesize of output 9 [2024-10-24 16:04:50,343 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:04:50,344 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:04:50,362 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 18 treesize of output 16 [2024-10-24 16:04:50,364 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 20 treesize of output 16 [2024-10-24 16:04:50,440 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:04:50,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051513767] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:04:50,440 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:04:50,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 16] total 31 [2024-10-24 16:04:50,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715801725] [2024-10-24 16:04:50,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:04:50,441 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-10-24 16:04:50,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:04:50,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-10-24 16:04:50,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=858, Unknown=0, NotChecked=0, Total=930 [2024-10-24 16:04:50,441 INFO L87 Difference]: Start difference. First operand 229 states and 266 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:51,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:04:51,596 INFO L93 Difference]: Finished difference Result 408 states and 457 transitions. [2024-10-24 16:04:51,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-10-24 16:04:51,596 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2024-10-24 16:04:51,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:04:51,597 INFO L225 Difference]: With dead ends: 408 [2024-10-24 16:04:51,597 INFO L226 Difference]: Without dead ends: 348 [2024-10-24 16:04:51,598 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=221, Invalid=2641, Unknown=0, NotChecked=0, Total=2862 [2024-10-24 16:04:51,599 INFO L432 NwaCegarLoop]: 53 mSDtfsCounter, 94 mSDsluCounter, 1069 mSDsCounter, 0 mSdLazyCounter, 1472 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 1122 SdHoareTripleChecker+Invalid, 1491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-24 16:04:51,599 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 1122 Invalid, 1491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1472 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-24 16:04:51,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2024-10-24 16:04:51,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 269. [2024-10-24 16:04:51,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 265 states have (on average 1.1773584905660377) internal successors, (312), 268 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:51,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 312 transitions. [2024-10-24 16:04:51,604 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 312 transitions. Word has length 30 [2024-10-24 16:04:51,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:04:51,604 INFO L471 AbstractCegarLoop]: Abstraction has 269 states and 312 transitions. [2024-10-24 16:04:51,604 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:51,604 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 312 transitions. [2024-10-24 16:04:51,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-10-24 16:04:51,605 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:04:51,605 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] [2024-10-24 16:04:51,618 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-10-24 16:04:51,808 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-10-24 16:04:51,809 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-24 16:04:51,809 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:04:51,809 INFO L85 PathProgramCache]: Analyzing trace with hash -888690195, now seen corresponding path program 2 times [2024-10-24 16:04:51,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:04:51,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811795515] [2024-10-24 16:04:51,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:04:51,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:04:51,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:04:52,102 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:04:52,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:04:52,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811795515] [2024-10-24 16:04:52,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811795515] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:04:52,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042682638] [2024-10-24 16:04:52,103 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 16:04:52,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:04:52,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:04:52,104 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:04:52,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-10-24 16:04:52,196 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 16:04:52,196 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 16:04:52,197 INFO L255 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-10-24 16:04:52,198 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:04:52,291 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-10-24 16:04:52,470 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-24 16:04:52,472 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-24 16:04:52,472 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2024-10-24 16:04:52,475 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:04:52,475 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:04:52,552 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-10-24 16:04:52,554 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-10-24 16:04:52,744 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:04:52,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042682638] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:04:52,745 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:04:52,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 29 [2024-10-24 16:04:52,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673722881] [2024-10-24 16:04:52,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:04:52,745 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-10-24 16:04:52,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:04:52,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-10-24 16:04:52,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=696, Unknown=0, NotChecked=0, Total=812 [2024-10-24 16:04:52,746 INFO L87 Difference]: Start difference. First operand 269 states and 312 transitions. Second operand has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 29 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:52,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:04:52,934 INFO L93 Difference]: Finished difference Result 289 states and 330 transitions. [2024-10-24 16:04:52,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-24 16:04:52,934 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 29 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2024-10-24 16:04:52,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:04:52,935 INFO L225 Difference]: With dead ends: 289 [2024-10-24 16:04:52,935 INFO L226 Difference]: Without dead ends: 258 [2024-10-24 16:04:52,935 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=163, Invalid=959, Unknown=0, NotChecked=0, Total=1122 [2024-10-24 16:04:52,936 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 8 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 16:04:52,936 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 234 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 16:04:52,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2024-10-24 16:04:52,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 258. [2024-10-24 16:04:52,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 254 states have (on average 1.1732283464566928) internal successors, (298), 257 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:52,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 298 transitions. [2024-10-24 16:04:52,940 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 298 transitions. Word has length 30 [2024-10-24 16:04:52,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:04:52,940 INFO L471 AbstractCegarLoop]: Abstraction has 258 states and 298 transitions. [2024-10-24 16:04:52,940 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 29 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:52,940 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 298 transitions. [2024-10-24 16:04:52,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-10-24 16:04:52,941 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:04:52,941 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:04:52,954 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-10-24 16:04:53,144 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-10-24 16:04:53,145 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-24 16:04:53,145 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:04:53,145 INFO L85 PathProgramCache]: Analyzing trace with hash -529980294, now seen corresponding path program 4 times [2024-10-24 16:04:53,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:04:53,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089092376] [2024-10-24 16:04:53,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:04:53,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:04:53,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:04:53,422 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:04:53,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:04:53,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089092376] [2024-10-24 16:04:53,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089092376] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:04:53,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957295933] [2024-10-24 16:04:53,422 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-24 16:04:53,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:04:53,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:04:53,424 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:04:53,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-10-24 16:04:53,584 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-24 16:04:53,584 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 16:04:53,587 INFO L255 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 58 conjuncts are in the unsatisfiable core [2024-10-24 16:04:53,590 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:04:53,765 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:04:53,765 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:04:53,922 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-10-24 16:04:54,065 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:04:54,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957295933] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:04:54,066 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:04:54,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 35 [2024-10-24 16:04:54,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197871350] [2024-10-24 16:04:54,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:04:54,066 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-10-24 16:04:54,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:04:54,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-10-24 16:04:54,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1086, Unknown=0, NotChecked=0, Total=1260 [2024-10-24 16:04:54,067 INFO L87 Difference]: Start difference. First operand 258 states and 298 transitions. Second operand has 36 states, 35 states have (on average 2.257142857142857) internal successors, (79), 36 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:54,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:04:54,533 INFO L93 Difference]: Finished difference Result 352 states and 396 transitions. [2024-10-24 16:04:54,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-24 16:04:54,534 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.257142857142857) internal successors, (79), 36 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2024-10-24 16:04:54,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:04:54,535 INFO L225 Difference]: With dead ends: 352 [2024-10-24 16:04:54,535 INFO L226 Difference]: Without dead ends: 350 [2024-10-24 16:04:54,535 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=193, Invalid=1139, Unknown=0, NotChecked=0, Total=1332 [2024-10-24 16:04:54,535 INFO L432 NwaCegarLoop]: 45 mSDtfsCounter, 105 mSDsluCounter, 810 mSDsCounter, 0 mSdLazyCounter, 1310 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 855 SdHoareTripleChecker+Invalid, 1324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-24 16:04:54,535 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 855 Invalid, 1324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1310 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-24 16:04:54,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2024-10-24 16:04:54,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 256. [2024-10-24 16:04:54,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 252 states have (on average 1.1785714285714286) internal successors, (297), 255 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:54,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 297 transitions. [2024-10-24 16:04:54,539 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 297 transitions. Word has length 32 [2024-10-24 16:04:54,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:04:54,539 INFO L471 AbstractCegarLoop]: Abstraction has 256 states and 297 transitions. [2024-10-24 16:04:54,539 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.257142857142857) internal successors, (79), 36 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:54,540 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 297 transitions. [2024-10-24 16:04:54,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-10-24 16:04:54,540 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:04:54,540 INFO L215 NwaCegarLoop]: trace histogram [3, 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] [2024-10-24 16:04:54,553 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-10-24 16:04:54,740 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:04:54,741 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-24 16:04:54,741 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:04:54,741 INFO L85 PathProgramCache]: Analyzing trace with hash 235602736, now seen corresponding path program 2 times [2024-10-24 16:04:54,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:04:54,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886026594] [2024-10-24 16:04:54,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:04:54,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:04:54,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:04:55,029 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 16:04:55,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:04:55,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886026594] [2024-10-24 16:04:55,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886026594] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:04:55,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148174763] [2024-10-24 16:04:55,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 16:04:55,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:04:55,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:04:55,032 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:04:55,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-10-24 16:04:55,127 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 16:04:55,127 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 16:04:55,129 INFO L255 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 54 conjuncts are in the unsatisfiable core [2024-10-24 16:04:55,130 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:04:55,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-24 16:04:55,143 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2024-10-24 16:04:55,146 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-10-24 16:04:55,548 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 16:04:55,549 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:04:55,982 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 16:04:55,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148174763] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:04:55,982 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:04:55,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 31 [2024-10-24 16:04:55,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171372096] [2024-10-24 16:04:55,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:04:55,983 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-10-24 16:04:55,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:04:55,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-10-24 16:04:55,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=871, Unknown=0, NotChecked=0, Total=992 [2024-10-24 16:04:55,984 INFO L87 Difference]: Start difference. First operand 256 states and 297 transitions. Second operand has 32 states, 31 states have (on average 2.967741935483871) internal successors, (92), 32 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:56,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:04:56,770 INFO L93 Difference]: Finished difference Result 409 states and 458 transitions. [2024-10-24 16:04:56,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-10-24 16:04:56,770 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.967741935483871) internal successors, (92), 32 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2024-10-24 16:04:56,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:04:56,771 INFO L225 Difference]: With dead ends: 409 [2024-10-24 16:04:56,771 INFO L226 Difference]: Without dead ends: 401 [2024-10-24 16:04:56,772 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=298, Invalid=1864, Unknown=0, NotChecked=0, Total=2162 [2024-10-24 16:04:56,772 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 112 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 905 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 931 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-24 16:04:56,772 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 322 Invalid, 931 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 905 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-24 16:04:56,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2024-10-24 16:04:56,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 260. [2024-10-24 16:04:56,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 256 states have (on average 1.1796875) internal successors, (302), 259 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:56,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 302 transitions. [2024-10-24 16:04:56,781 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 302 transitions. Word has length 32 [2024-10-24 16:04:56,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:04:56,781 INFO L471 AbstractCegarLoop]: Abstraction has 260 states and 302 transitions. [2024-10-24 16:04:56,781 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.967741935483871) internal successors, (92), 32 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:56,781 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 302 transitions. [2024-10-24 16:04:56,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-10-24 16:04:56,782 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:04:56,782 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:04:56,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-10-24 16:04:56,985 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,SelfDestructingSolverStorable41 [2024-10-24 16:04:56,986 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-24 16:04:56,986 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:04:56,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1573946407, now seen corresponding path program 3 times [2024-10-24 16:04:56,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:04:56,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571608529] [2024-10-24 16:04:56,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:04:56,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:04:57,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:04:57,216 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-24 16:04:57,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:04:57,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571608529] [2024-10-24 16:04:57,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571608529] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:04:57,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368615775] [2024-10-24 16:04:57,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-24 16:04:57,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:04:57,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:04:57,219 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:04:57,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-10-24 16:04:57,343 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-24 16:04:57,343 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 16:04:57,347 INFO L255 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-10-24 16:04:57,348 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:04:57,397 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-10-24 16:04:57,442 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-24 16:04:57,442 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:04:57,457 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-10-24 16:04:57,459 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-10-24 16:04:57,496 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-24 16:04:57,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368615775] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:04:57,496 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:04:57,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 22 [2024-10-24 16:04:57,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772580097] [2024-10-24 16:04:57,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:04:57,497 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-24 16:04:57,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:04:57,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-24 16:04:57,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2024-10-24 16:04:57,499 INFO L87 Difference]: Start difference. First operand 260 states and 302 transitions. Second operand has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:57,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:04:57,636 INFO L93 Difference]: Finished difference Result 429 states and 486 transitions. [2024-10-24 16:04:57,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-24 16:04:57,636 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2024-10-24 16:04:57,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:04:57,637 INFO L225 Difference]: With dead ends: 429 [2024-10-24 16:04:57,637 INFO L226 Difference]: Without dead ends: 350 [2024-10-24 16:04:57,638 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2024-10-24 16:04:57,639 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 20 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 16:04:57,642 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 234 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 16:04:57,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2024-10-24 16:04:57,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 309. [2024-10-24 16:04:57,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 305 states have (on average 1.1704918032786886) internal successors, (357), 308 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:57,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 357 transitions. [2024-10-24 16:04:57,646 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 357 transitions. Word has length 32 [2024-10-24 16:04:57,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:04:57,646 INFO L471 AbstractCegarLoop]: Abstraction has 309 states and 357 transitions. [2024-10-24 16:04:57,646 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:04:57,646 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 357 transitions. [2024-10-24 16:04:57,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-10-24 16:04:57,646 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:04:57,646 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:04:57,661 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-10-24 16:04:57,850 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:04:57,851 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-24 16:04:57,851 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:04:57,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1088446449, now seen corresponding path program 6 times [2024-10-24 16:04:57,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:04:57,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885057687] [2024-10-24 16:04:57,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:04:57,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:04:57,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:04:58,282 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:04:58,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:04:58,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885057687] [2024-10-24 16:04:58,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885057687] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:04:58,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645938593] [2024-10-24 16:04:58,283 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-24 16:04:58,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:04:58,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:04:58,284 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:04:58,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-10-24 16:04:58,386 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-10-24 16:04:58,386 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 16:04:58,388 INFO L255 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 68 conjuncts are in the unsatisfiable core [2024-10-24 16:04:58,390 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:04:58,505 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-10-24 16:04:58,656 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:04:58,656 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:04:58,676 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 18 treesize of output 16 [2024-10-24 16:04:58,677 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 20 treesize of output 16 [2024-10-24 16:04:58,753 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:04:58,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645938593] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:04:58,753 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:04:58,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 18] total 35 [2024-10-24 16:04:58,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022502327] [2024-10-24 16:04:58,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:04:58,754 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-10-24 16:04:58,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:04:58,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-10-24 16:04:58,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1107, Unknown=0, NotChecked=0, Total=1190 [2024-10-24 16:04:58,755 INFO L87 Difference]: Start difference. First operand 309 states and 357 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 35 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) [2024-10-24 16:04:59,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:04:59,996 INFO L93 Difference]: Finished difference Result 535 states and 597 transitions. [2024-10-24 16:04:59,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2024-10-24 16:04:59,997 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 35 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) Word has length 34 [2024-10-24 16:04:59,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:04:59,998 INFO L225 Difference]: With dead ends: 535 [2024-10-24 16:04:59,998 INFO L226 Difference]: Without dead ends: 469 [2024-10-24 16:04:59,999 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 604 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=262, Invalid=3520, Unknown=0, NotChecked=0, Total=3782 [2024-10-24 16:04:59,999 INFO L432 NwaCegarLoop]: 58 mSDtfsCounter, 95 mSDsluCounter, 1277 mSDsCounter, 0 mSdLazyCounter, 1759 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 1335 SdHoareTripleChecker+Invalid, 1782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1759 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-24 16:04:59,999 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 1335 Invalid, 1782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1759 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-24 16:05:00,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2024-10-24 16:05:00,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 360. [2024-10-24 16:05:00,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 356 states have (on average 1.1685393258426966) internal successors, (416), 359 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:05:00,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 416 transitions. [2024-10-24 16:05:00,005 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 416 transitions. Word has length 34 [2024-10-24 16:05:00,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:05:00,005 INFO L471 AbstractCegarLoop]: Abstraction has 360 states and 416 transitions. [2024-10-24 16:05:00,005 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 35 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) [2024-10-24 16:05:00,005 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 416 transitions. [2024-10-24 16:05:00,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-10-24 16:05:00,006 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:05:00,006 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:05:00,019 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-10-24 16:05:00,206 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:05:00,206 INFO L396 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-24 16:05:00,207 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:05:00,207 INFO L85 PathProgramCache]: Analyzing trace with hash -759962249, now seen corresponding path program 4 times [2024-10-24 16:05:00,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:05:00,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654840237] [2024-10-24 16:05:00,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:05:00,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:05:00,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:05:00,418 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-24 16:05:00,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:05:00,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654840237] [2024-10-24 16:05:00,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654840237] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:05:00,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243980719] [2024-10-24 16:05:00,419 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-24 16:05:00,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:05:00,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:05:00,420 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:05:00,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-10-24 16:05:00,505 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-24 16:05:00,505 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 16:05:00,507 INFO L255 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-10-24 16:05:00,508 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:05:00,529 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-10-24 16:05:00,797 INFO L349 Elim1Store]: treesize reduction 4, result has 81.8 percent of original size [2024-10-24 16:05:00,797 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 28 [2024-10-24 16:05:00,904 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-24 16:05:00,905 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:05:01,240 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2024-10-24 16:05:01,246 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 39 [2024-10-24 16:05:01,251 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-10-24 16:05:01,273 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-24 16:05:01,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243980719] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:05:01,274 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:05:01,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 29 [2024-10-24 16:05:01,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868134621] [2024-10-24 16:05:01,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:05:01,274 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-10-24 16:05:01,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:05:01,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-10-24 16:05:01,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=748, Unknown=0, NotChecked=0, Total=870 [2024-10-24 16:05:01,275 INFO L87 Difference]: Start difference. First operand 360 states and 416 transitions. Second operand has 30 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 30 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) [2024-10-24 16:05:02,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:05:02,068 INFO L93 Difference]: Finished difference Result 403 states and 453 transitions. [2024-10-24 16:05:02,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-10-24 16:05:02,068 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 30 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) Word has length 34 [2024-10-24 16:05:02,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:05:02,069 INFO L225 Difference]: With dead ends: 403 [2024-10-24 16:05:02,069 INFO L226 Difference]: Without dead ends: 403 [2024-10-24 16:05:02,070 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=311, Invalid=1945, Unknown=0, NotChecked=0, Total=2256 [2024-10-24 16:05:02,070 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 72 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-24 16:05:02,070 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 262 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-24 16:05:02,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2024-10-24 16:05:02,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 319. [2024-10-24 16:05:02,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 316 states have (on average 1.1645569620253164) internal successors, (368), 318 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:05:02,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 368 transitions. [2024-10-24 16:05:02,081 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 368 transitions. Word has length 34 [2024-10-24 16:05:02,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:05:02,081 INFO L471 AbstractCegarLoop]: Abstraction has 319 states and 368 transitions. [2024-10-24 16:05:02,081 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 30 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) [2024-10-24 16:05:02,081 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 368 transitions. [2024-10-24 16:05:02,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-10-24 16:05:02,082 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:05:02,082 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:05:02,097 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-10-24 16:05:02,282 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:05:02,282 INFO L396 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-24 16:05:02,283 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:05:02,283 INFO L85 PathProgramCache]: Analyzing trace with hash -221244115, now seen corresponding path program 5 times [2024-10-24 16:05:02,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:05:02,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629533481] [2024-10-24 16:05:02,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:05:02,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:05:02,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:05:02,562 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 16 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:05:02,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:05:02,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629533481] [2024-10-24 16:05:02,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629533481] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:05:02,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520445515] [2024-10-24 16:05:02,563 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-24 16:05:02,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:05:02,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:05:02,564 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:05:02,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-10-24 16:05:02,663 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-10-24 16:05:02,663 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 16:05:02,665 INFO L255 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 67 conjuncts are in the unsatisfiable core [2024-10-24 16:05:02,667 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:05:02,837 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:05:02,837 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:05:02,992 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-10-24 16:05:03,170 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:05:03,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520445515] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:05:03,170 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:05:03,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 40 [2024-10-24 16:05:03,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048033861] [2024-10-24 16:05:03,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:05:03,171 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-10-24 16:05:03,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:05:03,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-10-24 16:05:03,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=1416, Unknown=0, NotChecked=0, Total=1640 [2024-10-24 16:05:03,172 INFO L87 Difference]: Start difference. First operand 319 states and 368 transitions. Second operand has 41 states, 40 states have (on average 2.225) internal successors, (89), 41 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) [2024-10-24 16:05:03,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:05:03,552 INFO L93 Difference]: Finished difference Result 420 states and 474 transitions. [2024-10-24 16:05:03,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-10-24 16:05:03,552 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 2.225) internal successors, (89), 41 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 36 [2024-10-24 16:05:03,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:05:03,553 INFO L225 Difference]: With dead ends: 420 [2024-10-24 16:05:03,553 INFO L226 Difference]: Without dead ends: 409 [2024-10-24 16:05:03,554 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=246, Invalid=1476, Unknown=0, NotChecked=0, Total=1722 [2024-10-24 16:05:03,554 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 108 mSDsluCounter, 676 mSDsCounter, 0 mSdLazyCounter, 1137 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 723 SdHoareTripleChecker+Invalid, 1158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-24 16:05:03,554 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 723 Invalid, 1158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1137 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-24 16:05:03,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2024-10-24 16:05:03,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 309. [2024-10-24 16:05:03,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 306 states have (on average 1.1699346405228759) internal successors, (358), 308 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:05:03,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 358 transitions. [2024-10-24 16:05:03,563 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 358 transitions. Word has length 36 [2024-10-24 16:05:03,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:05:03,563 INFO L471 AbstractCegarLoop]: Abstraction has 309 states and 358 transitions. [2024-10-24 16:05:03,563 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 2.225) internal successors, (89), 41 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) [2024-10-24 16:05:03,563 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 358 transitions. [2024-10-24 16:05:03,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-10-24 16:05:03,564 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:05:03,564 INFO L215 NwaCegarLoop]: trace histogram [4, 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] [2024-10-24 16:05:03,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-10-24 16:05:03,764 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:05:03,764 INFO L396 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-24 16:05:03,765 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:05:03,765 INFO L85 PathProgramCache]: Analyzing trace with hash 759250915, now seen corresponding path program 3 times [2024-10-24 16:05:03,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:05:03,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599888991] [2024-10-24 16:05:03,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:05:03,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:05:03,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:05:04,103 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 16:05:04,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:05:04,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599888991] [2024-10-24 16:05:04,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599888991] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:05:04,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478508702] [2024-10-24 16:05:04,104 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-24 16:05:04,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:05:04,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:05:04,105 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:05:04,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-10-24 16:05:04,212 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-10-24 16:05:04,212 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 16:05:04,214 INFO L255 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-10-24 16:05:04,216 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:05:04,238 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-10-24 16:05:04,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-24 16:05:04,242 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-10-24 16:05:04,654 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 16:05:04,654 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:05:05,058 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-24 16:05:05,094 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 16:05:05,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478508702] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:05:05,094 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:05:05,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 38 [2024-10-24 16:05:05,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519439147] [2024-10-24 16:05:05,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:05:05,095 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-10-24 16:05:05,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:05:05,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-10-24 16:05:05,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1386, Unknown=0, NotChecked=0, Total=1560 [2024-10-24 16:05:05,096 INFO L87 Difference]: Start difference. First operand 309 states and 358 transitions. Second operand has 40 states, 39 states have (on average 2.769230769230769) internal successors, (108), 39 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:05:06,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:05:06,150 INFO L93 Difference]: Finished difference Result 622 states and 673 transitions. [2024-10-24 16:05:06,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-10-24 16:05:06,150 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 2.769230769230769) internal successors, (108), 39 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2024-10-24 16:05:06,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:05:06,152 INFO L225 Difference]: With dead ends: 622 [2024-10-24 16:05:06,152 INFO L226 Difference]: Without dead ends: 594 [2024-10-24 16:05:06,152 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 804 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=538, Invalid=3368, Unknown=0, NotChecked=0, Total=3906 [2024-10-24 16:05:06,153 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 210 mSDsluCounter, 560 mSDsCounter, 0 mSdLazyCounter, 1447 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 598 SdHoareTripleChecker+Invalid, 1507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-24 16:05:06,153 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 598 Invalid, 1507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1447 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-24 16:05:06,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2024-10-24 16:05:06,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 338. [2024-10-24 16:05:06,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 335 states have (on average 1.155223880597015) internal successors, (387), 337 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:05:06,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 387 transitions. [2024-10-24 16:05:06,158 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 387 transitions. Word has length 36 [2024-10-24 16:05:06,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:05:06,158 INFO L471 AbstractCegarLoop]: Abstraction has 338 states and 387 transitions. [2024-10-24 16:05:06,158 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 2.769230769230769) internal successors, (108), 39 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:05:06,158 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 387 transitions. [2024-10-24 16:05:06,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-10-24 16:05:06,158 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:05:06,159 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:05:06,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-10-24 16:05:06,359 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,SelfDestructingSolverStorable46 [2024-10-24 16:05:06,359 INFO L396 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-24 16:05:06,359 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:05:06,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1318190876, now seen corresponding path program 7 times [2024-10-24 16:05:06,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:05:06,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809845681] [2024-10-24 16:05:06,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:05:06,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:05:06,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:05:06,858 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 16 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:05:06,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:05:06,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809845681] [2024-10-24 16:05:06,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809845681] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:05:06,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25173249] [2024-10-24 16:05:06,858 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-24 16:05:06,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:05:06,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:05:06,860 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:05:06,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-10-24 16:05:06,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:05:06,963 INFO L255 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 78 conjuncts are in the unsatisfiable core [2024-10-24 16:05:06,965 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:05:07,116 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-10-24 16:05:07,304 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 7 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:05:07,305 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:05:07,321 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 18 treesize of output 16 [2024-10-24 16:05:07,322 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 20 treesize of output 16 [2024-10-24 16:05:07,396 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 7 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:05:07,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25173249] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:05:07,396 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:05:07,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20, 20] total 39 [2024-10-24 16:05:07,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418687761] [2024-10-24 16:05:07,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:05:07,397 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-10-24 16:05:07,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:05:07,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-10-24 16:05:07,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1388, Unknown=0, NotChecked=0, Total=1482 [2024-10-24 16:05:07,398 INFO L87 Difference]: Start difference. First operand 338 states and 387 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:05:08,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:05:08,992 INFO L93 Difference]: Finished difference Result 543 states and 607 transitions. [2024-10-24 16:05:08,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2024-10-24 16:05:08,993 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2024-10-24 16:05:08,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:05:08,994 INFO L225 Difference]: With dead ends: 543 [2024-10-24 16:05:08,994 INFO L226 Difference]: Without dead ends: 471 [2024-10-24 16:05:08,995 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 788 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=311, Invalid=4659, Unknown=0, NotChecked=0, Total=4970 [2024-10-24 16:05:08,995 INFO L432 NwaCegarLoop]: 57 mSDtfsCounter, 103 mSDsluCounter, 1475 mSDsCounter, 0 mSdLazyCounter, 2197 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 1532 SdHoareTripleChecker+Invalid, 2224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 2197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-10-24 16:05:08,995 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 1532 Invalid, 2224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 2197 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-10-24 16:05:08,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2024-10-24 16:05:08,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 393. [2024-10-24 16:05:08,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 390 states have (on average 1.1564102564102565) internal successors, (451), 392 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:05:09,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 451 transitions. [2024-10-24 16:05:09,000 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 451 transitions. Word has length 38 [2024-10-24 16:05:09,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:05:09,000 INFO L471 AbstractCegarLoop]: Abstraction has 393 states and 451 transitions. [2024-10-24 16:05:09,000 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:05:09,000 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 451 transitions. [2024-10-24 16:05:09,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-10-24 16:05:09,001 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:05:09,001 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:05:09,017 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-10-24 16:05:09,201 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,SelfDestructingSolverStorable47 [2024-10-24 16:05:09,202 INFO L396 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-24 16:05:09,202 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:05:09,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1460837607, now seen corresponding path program 1 times [2024-10-24 16:05:09,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:05:09,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041560270] [2024-10-24 16:05:09,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:05:09,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:05:09,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:05:09,710 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 19 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-24 16:05:09,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:05:09,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041560270] [2024-10-24 16:05:09,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041560270] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:05:09,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303970991] [2024-10-24 16:05:09,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:05:09,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:05:09,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:05:09,712 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:05:09,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-10-24 16:05:09,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:05:09,816 INFO L255 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 69 conjuncts are in the unsatisfiable core [2024-10-24 16:05:09,818 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:05:09,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-24 16:05:09,853 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2024-10-24 16:05:09,859 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-10-24 16:05:10,422 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-24 16:05:10,422 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:05:11,131 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-24 16:05:11,202 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-24 16:05:11,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303970991] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:05:11,203 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:05:11,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 18] total 49 [2024-10-24 16:05:11,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599911649] [2024-10-24 16:05:11,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:05:11,203 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-10-24 16:05:11,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:05:11,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-10-24 16:05:11,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=315, Invalid=2235, Unknown=0, NotChecked=0, Total=2550 [2024-10-24 16:05:11,204 INFO L87 Difference]: Start difference. First operand 393 states and 451 transitions. Second operand has 51 states, 50 states have (on average 2.22) internal successors, (111), 50 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) [2024-10-24 16:05:12,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:05:12,366 INFO L93 Difference]: Finished difference Result 608 states and 666 transitions. [2024-10-24 16:05:12,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-10-24 16:05:12,366 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 2.22) internal successors, (111), 50 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) Word has length 39 [2024-10-24 16:05:12,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:05:12,367 INFO L225 Difference]: With dead ends: 608 [2024-10-24 16:05:12,367 INFO L226 Difference]: Without dead ends: 517 [2024-10-24 16:05:12,368 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1800 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=896, Invalid=5746, Unknown=0, NotChecked=0, Total=6642 [2024-10-24 16:05:12,369 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 230 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 885 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 935 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 885 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-24 16:05:12,369 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [230 Valid, 242 Invalid, 935 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 885 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-24 16:05:12,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2024-10-24 16:05:12,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 391. [2024-10-24 16:05:12,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 388 states have (on average 1.1417525773195876) internal successors, (443), 390 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:05:12,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 443 transitions. [2024-10-24 16:05:12,373 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 443 transitions. Word has length 39 [2024-10-24 16:05:12,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:05:12,373 INFO L471 AbstractCegarLoop]: Abstraction has 391 states and 443 transitions. [2024-10-24 16:05:12,373 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 2.22) internal successors, (111), 50 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) [2024-10-24 16:05:12,373 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 443 transitions. [2024-10-24 16:05:12,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-10-24 16:05:12,374 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:05:12,374 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:05:12,386 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-10-24 16:05:12,574 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2024-10-24 16:05:12,574 INFO L396 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-24 16:05:12,575 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:05:12,575 INFO L85 PathProgramCache]: Analyzing trace with hash -842483680, now seen corresponding path program 6 times [2024-10-24 16:05:12,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:05:12,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988087702] [2024-10-24 16:05:12,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:05:12,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:05:12,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:05:12,878 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 25 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:05:12,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:05:12,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988087702] [2024-10-24 16:05:12,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988087702] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:05:12,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825409752] [2024-10-24 16:05:12,879 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-24 16:05:12,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:05:12,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:05:12,880 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:05:12,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-10-24 16:05:13,006 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2024-10-24 16:05:13,006 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 16:05:13,008 INFO L255 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 63 conjuncts are in the unsatisfiable core [2024-10-24 16:05:13,010 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:05:13,298 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:05:13,298 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:05:13,526 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2024-10-24 16:05:13,618 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:05:13,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825409752] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:05:13,618 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:05:13,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 46 [2024-10-24 16:05:13,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82779154] [2024-10-24 16:05:13,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:05:13,618 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-10-24 16:05:13,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:05:13,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-10-24 16:05:13,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=1841, Unknown=0, NotChecked=0, Total=2162 [2024-10-24 16:05:13,620 INFO L87 Difference]: Start difference. First operand 391 states and 443 transitions. Second operand has 47 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 47 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:05:13,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:05:13,983 INFO L93 Difference]: Finished difference Result 511 states and 568 transitions. [2024-10-24 16:05:13,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-24 16:05:13,983 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 47 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) Word has length 40 [2024-10-24 16:05:13,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:05:13,984 INFO L225 Difference]: With dead ends: 511 [2024-10-24 16:05:13,984 INFO L226 Difference]: Without dead ends: 500 [2024-10-24 16:05:13,985 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 43 SyntacticMatches, 8 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 972 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=338, Invalid=1918, Unknown=0, NotChecked=0, Total=2256 [2024-10-24 16:05:13,985 INFO L432 NwaCegarLoop]: 49 mSDtfsCounter, 139 mSDsluCounter, 647 mSDsCounter, 0 mSdLazyCounter, 1160 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 696 SdHoareTripleChecker+Invalid, 1187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-24 16:05:13,985 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 696 Invalid, 1187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1160 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-24 16:05:13,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2024-10-24 16:05:13,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 379. [2024-10-24 16:05:13,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 376 states have (on average 1.1462765957446808) internal successors, (431), 378 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:05:13,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 431 transitions. [2024-10-24 16:05:13,988 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 431 transitions. Word has length 40 [2024-10-24 16:05:13,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:05:13,988 INFO L471 AbstractCegarLoop]: Abstraction has 379 states and 431 transitions. [2024-10-24 16:05:13,989 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 47 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:05:13,989 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 431 transitions. [2024-10-24 16:05:13,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-10-24 16:05:13,989 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:05:13,989 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:05:14,002 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2024-10-24 16:05:14,189 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2024-10-24 16:05:14,190 INFO L396 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-24 16:05:14,190 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:05:14,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1901203754, now seen corresponding path program 4 times [2024-10-24 16:05:14,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:05:14,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680439684] [2024-10-24 16:05:14,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:05:14,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:05:14,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:05:14,584 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 16:05:14,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:05:14,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680439684] [2024-10-24 16:05:14,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680439684] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:05:14,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599444835] [2024-10-24 16:05:14,584 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-24 16:05:14,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:05:14,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:05:14,585 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:05:14,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-10-24 16:05:14,706 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-24 16:05:14,706 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 16:05:14,708 INFO L255 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 79 conjuncts are in the unsatisfiable core [2024-10-24 16:05:14,710 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:05:14,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-24 16:05:14,727 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2024-10-24 16:05:14,737 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-10-24 16:05:15,297 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 16:05:15,297 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:05:15,849 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 16:05:15,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599444835] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:05:15,849 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:05:15,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17, 16] total 46 [2024-10-24 16:05:15,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844856543] [2024-10-24 16:05:15,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:05:15,850 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-10-24 16:05:15,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:05:15,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-10-24 16:05:15,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=1938, Unknown=0, NotChecked=0, Total=2162 [2024-10-24 16:05:15,851 INFO L87 Difference]: Start difference. First operand 379 states and 431 transitions. Second operand has 47 states, 46 states have (on average 2.5434782608695654) internal successors, (117), 47 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:05:17,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:05:17,373 INFO L93 Difference]: Finished difference Result 573 states and 627 transitions. [2024-10-24 16:05:17,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-10-24 16:05:17,373 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 2.5434782608695654) internal successors, (117), 47 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2024-10-24 16:05:17,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:05:17,374 INFO L225 Difference]: With dead ends: 573 [2024-10-24 16:05:17,374 INFO L226 Difference]: Without dead ends: 545 [2024-10-24 16:05:17,375 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1265 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=637, Invalid=5215, Unknown=0, NotChecked=0, Total=5852 [2024-10-24 16:05:17,375 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 188 mSDsluCounter, 591 mSDsCounter, 0 mSdLazyCounter, 1883 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 622 SdHoareTripleChecker+Invalid, 1937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1883 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-10-24 16:05:17,375 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 622 Invalid, 1937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1883 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-10-24 16:05:17,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2024-10-24 16:05:17,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 378. [2024-10-24 16:05:17,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 375 states have (on average 1.144) internal successors, (429), 377 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:05:17,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 429 transitions. [2024-10-24 16:05:17,379 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 429 transitions. Word has length 40 [2024-10-24 16:05:17,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:05:17,379 INFO L471 AbstractCegarLoop]: Abstraction has 378 states and 429 transitions. [2024-10-24 16:05:17,379 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 2.5434782608695654) internal successors, (117), 47 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:05:17,379 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 429 transitions. [2024-10-24 16:05:17,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-10-24 16:05:17,380 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:05:17,380 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:05:17,394 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-10-24 16:05:17,580 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:05:17,581 INFO L396 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-24 16:05:17,581 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:05:17,581 INFO L85 PathProgramCache]: Analyzing trace with hash -327597033, now seen corresponding path program 8 times [2024-10-24 16:05:17,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:05:17,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601852660] [2024-10-24 16:05:17,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:05:17,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:05:17,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:05:18,214 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 25 proven. 88 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:05:18,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:05:18,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601852660] [2024-10-24 16:05:18,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601852660] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:05:18,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79900352] [2024-10-24 16:05:18,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 16:05:18,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:05:18,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:05:18,219 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:05:18,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-10-24 16:05:18,349 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 16:05:18,349 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 16:05:18,355 INFO L255 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 88 conjuncts are in the unsatisfiable core [2024-10-24 16:05:18,358 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:05:18,570 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-10-24 16:05:18,834 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 8 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:05:18,834 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:05:18,856 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 18 treesize of output 16 [2024-10-24 16:05:18,858 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 20 treesize of output 16 [2024-10-24 16:05:18,934 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 8 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:05:18,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79900352] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:05:18,935 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:05:18,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22, 22] total 43 [2024-10-24 16:05:18,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473888046] [2024-10-24 16:05:18,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:05:18,935 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-10-24 16:05:18,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:05:18,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-10-24 16:05:18,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1698, Unknown=0, NotChecked=0, Total=1806 [2024-10-24 16:05:18,936 INFO L87 Difference]: Start difference. First operand 378 states and 429 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 43 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) [2024-10-24 16:05:20,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:05:20,556 INFO L93 Difference]: Finished difference Result 602 states and 668 transitions. [2024-10-24 16:05:20,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2024-10-24 16:05:20,556 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 43 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) Word has length 42 [2024-10-24 16:05:20,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:05:20,558 INFO L225 Difference]: With dead ends: 602 [2024-10-24 16:05:20,558 INFO L226 Difference]: Without dead ends: 524 [2024-10-24 16:05:20,558 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1028 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=353, Invalid=5653, Unknown=0, NotChecked=0, Total=6006 [2024-10-24 16:05:20,558 INFO L432 NwaCegarLoop]: 60 mSDtfsCounter, 102 mSDsluCounter, 1807 mSDsCounter, 0 mSdLazyCounter, 2811 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 1867 SdHoareTripleChecker+Invalid, 2842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 2811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-10-24 16:05:20,558 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 1867 Invalid, 2842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 2811 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-10-24 16:05:20,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2024-10-24 16:05:20,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 433. [2024-10-24 16:05:20,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 430 states have (on average 1.1418604651162791) internal successors, (491), 432 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:05:20,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 491 transitions. [2024-10-24 16:05:20,562 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 491 transitions. Word has length 42 [2024-10-24 16:05:20,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:05:20,562 INFO L471 AbstractCegarLoop]: Abstraction has 433 states and 491 transitions. [2024-10-24 16:05:20,562 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 43 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) [2024-10-24 16:05:20,562 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 491 transitions. [2024-10-24 16:05:20,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-10-24 16:05:20,563 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:05:20,563 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:05:20,576 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2024-10-24 16:05:20,767 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,SelfDestructingSolverStorable51 [2024-10-24 16:05:20,767 INFO L396 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-24 16:05:20,768 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:05:20,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1189950939, now seen corresponding path program 2 times [2024-10-24 16:05:20,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:05:20,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334730988] [2024-10-24 16:05:20,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:05:20,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:05:20,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:05:21,100 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 17 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-24 16:05:21,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:05:21,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334730988] [2024-10-24 16:05:21,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334730988] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:05:21,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902147831] [2024-10-24 16:05:21,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 16:05:21,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:05:21,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:05:21,104 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:05:21,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-10-24 16:05:21,234 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 16:05:21,234 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 16:05:21,239 INFO L255 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-10-24 16:05:21,241 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:05:21,302 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-10-24 16:05:21,369 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-10-24 16:05:21,395 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-24 16:05:21,395 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:05:21,428 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-10-24 16:05:21,432 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-10-24 16:05:21,474 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-24 16:05:21,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902147831] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:05:21,474 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:05:21,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 29 [2024-10-24 16:05:21,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345429433] [2024-10-24 16:05:21,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:05:21,474 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-10-24 16:05:21,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:05:21,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-10-24 16:05:21,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=736, Unknown=0, NotChecked=0, Total=812 [2024-10-24 16:05:21,475 INFO L87 Difference]: Start difference. First operand 433 states and 491 transitions. Second operand has 29 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 29 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:05:21,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:05:21,871 INFO L93 Difference]: Finished difference Result 813 states and 893 transitions. [2024-10-24 16:05:21,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-10-24 16:05:21,871 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 29 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 42 [2024-10-24 16:05:21,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:05:21,873 INFO L225 Difference]: With dead ends: 813 [2024-10-24 16:05:21,873 INFO L226 Difference]: Without dead ends: 592 [2024-10-24 16:05:21,873 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=173, Invalid=1719, Unknown=0, NotChecked=0, Total=1892 [2024-10-24 16:05:21,874 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 18 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 648 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-24 16:05:21,874 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 395 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 648 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-24 16:05:21,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2024-10-24 16:05:21,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 518. [2024-10-24 16:05:21,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 515 states have (on average 1.133980582524272) internal successors, (584), 517 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:05:21,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 584 transitions. [2024-10-24 16:05:21,879 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 584 transitions. Word has length 42 [2024-10-24 16:05:21,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:05:21,879 INFO L471 AbstractCegarLoop]: Abstraction has 518 states and 584 transitions. [2024-10-24 16:05:21,879 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 29 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:05:21,879 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 584 transitions. [2024-10-24 16:05:21,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-10-24 16:05:21,880 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:05:21,880 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:05:21,893 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-10-24 16:05:22,080 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:05:22,080 INFO L396 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-24 16:05:22,081 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:05:22,081 INFO L85 PathProgramCache]: Analyzing trace with hash 1642986835, now seen corresponding path program 7 times [2024-10-24 16:05:22,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:05:22,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950633992] [2024-10-24 16:05:22,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:05:22,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:05:22,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:05:22,420 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 36 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:05:22,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:05:22,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950633992] [2024-10-24 16:05:22,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950633992] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:05:22,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758642021] [2024-10-24 16:05:22,420 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-24 16:05:22,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:05:22,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:05:22,421 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:05:22,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-10-24 16:05:22,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:05:22,535 INFO L255 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 84 conjuncts are in the unsatisfiable core [2024-10-24 16:05:22,537 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:05:22,745 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:05:22,745 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:05:22,972 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 [2024-10-24 16:05:23,086 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:05:23,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758642021] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:05:23,086 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:05:23,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 21] total 43 [2024-10-24 16:05:23,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479782248] [2024-10-24 16:05:23,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:05:23,086 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-10-24 16:05:23,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:05:23,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-10-24 16:05:23,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1656, Unknown=0, NotChecked=0, Total=1892 [2024-10-24 16:05:23,087 INFO L87 Difference]: Start difference. First operand 518 states and 584 transitions. Second operand has 44 states, 43 states have (on average 2.046511627906977) internal successors, (88), 44 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:05:23,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:05:23,624 INFO L93 Difference]: Finished difference Result 683 states and 757 transitions. [2024-10-24 16:05:23,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-10-24 16:05:23,625 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 2.046511627906977) internal successors, (88), 44 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) Word has length 44 [2024-10-24 16:05:23,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:05:23,626 INFO L225 Difference]: With dead ends: 683 [2024-10-24 16:05:23,626 INFO L226 Difference]: Without dead ends: 667 [2024-10-24 16:05:23,626 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 55 SyntacticMatches, 9 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 868 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=255, Invalid=1725, Unknown=0, NotChecked=0, Total=1980 [2024-10-24 16:05:23,627 INFO L432 NwaCegarLoop]: 52 mSDtfsCounter, 138 mSDsluCounter, 903 mSDsCounter, 0 mSdLazyCounter, 1699 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 955 SdHoareTripleChecker+Invalid, 1730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-24 16:05:23,627 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 955 Invalid, 1730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1699 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-24 16:05:23,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2024-10-24 16:05:23,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 506. [2024-10-24 16:05:23,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 503 states have (on average 1.1371769383697814) internal successors, (572), 505 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:05:23,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 572 transitions. [2024-10-24 16:05:23,632 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 572 transitions. Word has length 44 [2024-10-24 16:05:23,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:05:23,632 INFO L471 AbstractCegarLoop]: Abstraction has 506 states and 572 transitions. [2024-10-24 16:05:23,632 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 2.046511627906977) internal successors, (88), 44 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:05:23,632 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 572 transitions. [2024-10-24 16:05:23,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-10-24 16:05:23,633 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:05:23,633 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:05:23,649 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2024-10-24 16:05:23,833 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:05:23,834 INFO L396 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-24 16:05:23,834 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:05:23,834 INFO L85 PathProgramCache]: Analyzing trace with hash 1658585097, now seen corresponding path program 5 times [2024-10-24 16:05:23,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:05:23,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921965313] [2024-10-24 16:05:23,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:05:23,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:05:23,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:05:24,272 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 9 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 16:05:24,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:05:24,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921965313] [2024-10-24 16:05:24,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921965313] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:05:24,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372960570] [2024-10-24 16:05:24,272 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-24 16:05:24,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:05:24,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:05:24,273 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:05:24,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-10-24 16:05:24,403 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-10-24 16:05:24,403 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 16:05:24,405 INFO L255 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 80 conjuncts are in the unsatisfiable core [2024-10-24 16:05:24,408 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:05:24,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-24 16:05:24,427 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2024-10-24 16:05:24,431 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-10-24 16:05:25,072 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 16 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 16:05:25,072 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:05:25,772 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 25 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 16:05:25,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372960570] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:05:25,772 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:05:25,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 17] total 50 [2024-10-24 16:05:25,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822498352] [2024-10-24 16:05:25,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:05:25,773 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-10-24 16:05:25,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:05:25,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-10-24 16:05:25,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=298, Invalid=2252, Unknown=0, NotChecked=0, Total=2550 [2024-10-24 16:05:25,774 INFO L87 Difference]: Start difference. First operand 506 states and 572 transitions. Second operand has 51 states, 50 states have (on average 2.58) internal successors, (129), 51 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:05:26,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:05:26,935 INFO L93 Difference]: Finished difference Result 970 states and 1045 transitions. [2024-10-24 16:05:26,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-10-24 16:05:26,936 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 2.58) internal successors, (129), 51 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2024-10-24 16:05:26,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:05:26,938 INFO L225 Difference]: With dead ends: 970 [2024-10-24 16:05:26,938 INFO L226 Difference]: Without dead ends: 924 [2024-10-24 16:05:26,938 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1183 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=667, Invalid=4883, Unknown=0, NotChecked=0, Total=5550 [2024-10-24 16:05:26,938 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 221 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 1486 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 1562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-24 16:05:26,938 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 483 Invalid, 1562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1486 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-24 16:05:26,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 924 states. [2024-10-24 16:05:26,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 924 to 525. [2024-10-24 16:05:26,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 522 states have (on average 1.1398467432950192) internal successors, (595), 524 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:05:26,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 595 transitions. [2024-10-24 16:05:26,944 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 595 transitions. Word has length 44 [2024-10-24 16:05:26,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:05:26,944 INFO L471 AbstractCegarLoop]: Abstraction has 525 states and 595 transitions. [2024-10-24 16:05:26,944 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 2.58) internal successors, (129), 51 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:05:26,944 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 595 transitions. [2024-10-24 16:05:26,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-10-24 16:05:26,945 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:05:26,945 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:05:26,957 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2024-10-24 16:05:27,145 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,SelfDestructingSolverStorable54 [2024-10-24 16:05:27,145 INFO L396 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-24 16:05:27,145 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:05:27,146 INFO L85 PathProgramCache]: Analyzing trace with hash -740222582, now seen corresponding path program 9 times [2024-10-24 16:05:27,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:05:27,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571356677] [2024-10-24 16:05:27,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:05:27,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:05:27,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:05:27,765 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 36 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:05:27,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:05:27,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571356677] [2024-10-24 16:05:27,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571356677] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:05:27,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766286770] [2024-10-24 16:05:27,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-24 16:05:27,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:05:27,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:05:27,767 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:05:27,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-10-24 16:05:27,920 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-10-24 16:05:27,920 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 16:05:27,923 INFO L255 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 98 conjuncts are in the unsatisfiable core [2024-10-24 16:05:27,926 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:05:28,137 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-10-24 16:05:28,406 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 9 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:05:28,406 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:05:28,432 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 18 treesize of output 16 [2024-10-24 16:05:28,434 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 20 treesize of output 16 [2024-10-24 16:05:28,531 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 9 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:05:28,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766286770] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:05:28,532 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:05:28,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 24, 24] total 47 [2024-10-24 16:05:28,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38703452] [2024-10-24 16:05:28,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:05:28,532 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-10-24 16:05:28,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:05:28,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-10-24 16:05:28,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=2040, Unknown=0, NotChecked=0, Total=2162 [2024-10-24 16:05:28,533 INFO L87 Difference]: Start difference. First operand 525 states and 595 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 47 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:05:30,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:05:30,442 INFO L93 Difference]: Finished difference Result 800 states and 888 transitions. [2024-10-24 16:05:30,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2024-10-24 16:05:30,442 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 47 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2024-10-24 16:05:30,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:05:30,444 INFO L225 Difference]: With dead ends: 800 [2024-10-24 16:05:30,444 INFO L226 Difference]: Without dead ends: 716 [2024-10-24 16:05:30,445 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1282 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=403, Invalid=6907, Unknown=0, NotChecked=0, Total=7310 [2024-10-24 16:05:30,445 INFO L432 NwaCegarLoop]: 64 mSDtfsCounter, 108 mSDsluCounter, 2054 mSDsCounter, 0 mSdLazyCounter, 3199 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 2118 SdHoareTripleChecker+Invalid, 3234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 3199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-10-24 16:05:30,445 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 2118 Invalid, 3234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 3199 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-10-24 16:05:30,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2024-10-24 16:05:30,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 595. [2024-10-24 16:05:30,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 592 states have (on average 1.1418918918918919) internal successors, (676), 594 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:05:30,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 676 transitions. [2024-10-24 16:05:30,450 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 676 transitions. Word has length 46 [2024-10-24 16:05:30,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:05:30,450 INFO L471 AbstractCegarLoop]: Abstraction has 595 states and 676 transitions. [2024-10-24 16:05:30,450 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 47 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:05:30,450 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 676 transitions. [2024-10-24 16:05:30,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-10-24 16:05:30,451 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:05:30,451 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:05:30,465 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2024-10-24 16:05:30,651 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:05:30,652 INFO L396 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-24 16:05:30,652 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:05:30,652 INFO L85 PathProgramCache]: Analyzing trace with hash 575390771, now seen corresponding path program 3 times [2024-10-24 16:05:30,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:05:30,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843848019] [2024-10-24 16:05:30,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:05:30,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:05:30,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:05:31,252 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 41 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-24 16:05:31,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:05:31,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843848019] [2024-10-24 16:05:31,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843848019] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:05:31,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174399003] [2024-10-24 16:05:31,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-24 16:05:31,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:05:31,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:05:31,253 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:05:31,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-10-24 16:05:31,421 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-10-24 16:05:31,421 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 16:05:31,423 INFO L255 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 86 conjuncts are in the unsatisfiable core [2024-10-24 16:05:31,426 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:05:31,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-24 16:05:31,472 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2024-10-24 16:05:31,476 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-10-24 16:05:32,191 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-24 16:05:32,191 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:05:33,021 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-24 16:05:33,100 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-24 16:05:33,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174399003] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:05:33,100 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:05:33,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 21] total 60 [2024-10-24 16:05:33,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083193754] [2024-10-24 16:05:33,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:05:33,101 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2024-10-24 16:05:33,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:05:33,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2024-10-24 16:05:33,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=381, Invalid=3401, Unknown=0, NotChecked=0, Total=3782 [2024-10-24 16:05:33,101 INFO L87 Difference]: Start difference. First operand 595 states and 676 transitions. Second operand has 62 states, 61 states have (on average 2.2131147540983607) internal successors, (135), 61 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:05:34,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:05:34,768 INFO L93 Difference]: Finished difference Result 940 states and 1019 transitions. [2024-10-24 16:05:34,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2024-10-24 16:05:34,768 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 61 states have (on average 2.2131147540983607) internal successors, (135), 61 states have internal predecessors, (135), 0 states have call successors, (0), 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 [2024-10-24 16:05:34,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:05:34,770 INFO L225 Difference]: With dead ends: 940 [2024-10-24 16:05:34,770 INFO L226 Difference]: Without dead ends: 814 [2024-10-24 16:05:34,770 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2759 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1092, Invalid=8220, Unknown=0, NotChecked=0, Total=9312 [2024-10-24 16:05:34,771 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 176 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 1887 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 562 SdHoareTripleChecker+Invalid, 1958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-10-24 16:05:34,771 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 562 Invalid, 1958 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1887 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-10-24 16:05:34,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2024-10-24 16:05:34,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 557. [2024-10-24 16:05:34,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 557 states, 554 states have (on average 1.135379061371841) internal successors, (629), 556 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:05:34,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 629 transitions. [2024-10-24 16:05:34,775 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 629 transitions. Word has length 47 [2024-10-24 16:05:34,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:05:34,775 INFO L471 AbstractCegarLoop]: Abstraction has 557 states and 629 transitions. [2024-10-24 16:05:34,776 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 61 states have (on average 2.2131147540983607) internal successors, (135), 61 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:05:34,776 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 629 transitions. [2024-10-24 16:05:34,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-10-24 16:05:34,776 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:05:34,776 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:05:34,790 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2024-10-24 16:05:34,977 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2024-10-24 16:05:34,977 INFO L396 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-24 16:05:34,977 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:05:34,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1583426362, now seen corresponding path program 8 times [2024-10-24 16:05:34,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:05:34,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035583871] [2024-10-24 16:05:34,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:05:34,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:05:34,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:05:35,406 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 49 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:05:35,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:05:35,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035583871] [2024-10-24 16:05:35,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035583871] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:05:35,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497792444] [2024-10-24 16:05:35,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 16:05:35,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:05:35,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:05:35,407 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:05:35,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-10-24 16:05:35,550 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 16:05:35,550 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 16:05:35,553 INFO L255 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 96 conjuncts are in the unsatisfiable core [2024-10-24 16:05:35,555 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:05:35,810 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 64 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:05:35,810 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:05:36,049 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-10-24 16:05:36,302 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 64 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:05:36,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497792444] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:05:36,302 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:05:36,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 55 [2024-10-24 16:05:36,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179382636] [2024-10-24 16:05:36,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:05:36,303 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2024-10-24 16:05:36,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:05:36,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2024-10-24 16:05:36,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=416, Invalid=2664, Unknown=0, NotChecked=0, Total=3080 [2024-10-24 16:05:36,304 INFO L87 Difference]: Start difference. First operand 557 states and 629 transitions. Second operand has 56 states, 55 states have (on average 2.1636363636363636) internal successors, (119), 56 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:05:36,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:05:36,937 INFO L93 Difference]: Finished difference Result 729 states and 809 transitions. [2024-10-24 16:05:36,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-10-24 16:05:36,937 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 2.1636363636363636) internal successors, (119), 56 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2024-10-24 16:05:36,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:05:36,939 INFO L225 Difference]: With dead ends: 729 [2024-10-24 16:05:36,939 INFO L226 Difference]: Without dead ends: 713 [2024-10-24 16:05:36,939 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1048 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=447, Invalid=2745, Unknown=0, NotChecked=0, Total=3192 [2024-10-24 16:05:36,939 INFO L432 NwaCegarLoop]: 54 mSDtfsCounter, 175 mSDsluCounter, 1064 mSDsCounter, 0 mSdLazyCounter, 2030 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 1118 SdHoareTripleChecker+Invalid, 2068 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 2030 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-24 16:05:36,939 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 1118 Invalid, 2068 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 2030 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-24 16:05:36,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2024-10-24 16:05:36,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 543. [2024-10-24 16:05:36,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 543 states, 540 states have (on average 1.1388888888888888) internal successors, (615), 542 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:05:36,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 615 transitions. [2024-10-24 16:05:36,943 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 615 transitions. Word has length 48 [2024-10-24 16:05:36,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:05:36,943 INFO L471 AbstractCegarLoop]: Abstraction has 543 states and 615 transitions. [2024-10-24 16:05:36,944 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 2.1636363636363636) internal successors, (119), 56 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:05:36,944 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 615 transitions. [2024-10-24 16:05:36,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-10-24 16:05:36,944 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:05:36,944 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:05:36,960 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2024-10-24 16:05:37,145 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:05:37,145 INFO L396 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-24 16:05:37,145 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:05:37,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1877318788, now seen corresponding path program 6 times [2024-10-24 16:05:37,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:05:37,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428897051] [2024-10-24 16:05:37,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:05:37,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:05:37,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:05:37,641 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 16 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 16:05:37,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:05:37,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428897051] [2024-10-24 16:05:37,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428897051] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:05:37,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8045434] [2024-10-24 16:05:37,641 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-24 16:05:37,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:05:37,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:05:37,642 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:05:37,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-10-24 16:05:37,909 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-10-24 16:05:37,909 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 16:05:37,912 INFO L255 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 97 conjuncts are in the unsatisfiable core [2024-10-24 16:05:37,914 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:05:37,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-24 16:05:37,921 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2024-10-24 16:05:37,925 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-10-24 16:05:38,665 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 16:05:38,665 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:05:39,547 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 16:05:39,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8045434] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:05:39,548 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:05:39,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21, 21] total 59 [2024-10-24 16:05:39,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767856579] [2024-10-24 16:05:39,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:05:39,548 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2024-10-24 16:05:39,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:05:39,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2024-10-24 16:05:39,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=336, Invalid=3204, Unknown=0, NotChecked=0, Total=3540 [2024-10-24 16:05:39,549 INFO L87 Difference]: Start difference. First operand 543 states and 615 transitions. Second operand has 60 states, 59 states have (on average 2.3728813559322033) internal successors, (140), 60 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:05:41,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:05:41,966 INFO L93 Difference]: Finished difference Result 900 states and 977 transitions. [2024-10-24 16:05:41,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2024-10-24 16:05:41,966 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 59 states have (on average 2.3728813559322033) internal successors, (140), 60 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2024-10-24 16:05:41,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:05:41,968 INFO L225 Difference]: With dead ends: 900 [2024-10-24 16:05:41,968 INFO L226 Difference]: Without dead ends: 866 [2024-10-24 16:05:41,968 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1396 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=928, Invalid=8002, Unknown=0, NotChecked=0, Total=8930 [2024-10-24 16:05:41,968 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 389 mSDsluCounter, 817 mSDsCounter, 0 mSdLazyCounter, 2713 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 852 SdHoareTripleChecker+Invalid, 2822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 2713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-10-24 16:05:41,969 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [389 Valid, 852 Invalid, 2822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 2713 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-10-24 16:05:41,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 866 states. [2024-10-24 16:05:41,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 866 to 556. [2024-10-24 16:05:41,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 553 states have (on average 1.1338155515370705) internal successors, (627), 555 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:05:41,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 627 transitions. [2024-10-24 16:05:41,975 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 627 transitions. Word has length 48 [2024-10-24 16:05:41,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:05:41,975 INFO L471 AbstractCegarLoop]: Abstraction has 556 states and 627 transitions. [2024-10-24 16:05:41,976 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 59 states have (on average 2.3728813559322033) internal successors, (140), 60 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:05:41,976 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 627 transitions. [2024-10-24 16:05:41,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-10-24 16:05:41,976 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:05:41,976 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:05:41,990 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2024-10-24 16:05:42,177 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2024-10-24 16:05:42,177 INFO L396 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-24 16:05:42,177 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:05:42,177 INFO L85 PathProgramCache]: Analyzing trace with hash -901222083, now seen corresponding path program 10 times [2024-10-24 16:05:42,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:05:42,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537368253] [2024-10-24 16:05:42,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:05:42,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:05:42,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:05:42,932 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 49 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:05:42,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:05:42,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537368253] [2024-10-24 16:05:42,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537368253] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:05:42,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244170015] [2024-10-24 16:05:42,933 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-24 16:05:42,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:05:42,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:05:42,934 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:05:42,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-10-24 16:05:43,091 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-24 16:05:43,091 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 16:05:43,094 INFO L255 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 108 conjuncts are in the unsatisfiable core [2024-10-24 16:05:43,096 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:05:43,339 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-10-24 16:05:43,670 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 10 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:05:43,670 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:05:43,695 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 18 treesize of output 16 [2024-10-24 16:05:43,698 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 20 treesize of output 16 [2024-10-24 16:05:43,785 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 10 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:05:43,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244170015] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:05:43,786 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:05:43,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 26, 26] total 51 [2024-10-24 16:05:43,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421601304] [2024-10-24 16:05:43,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:05:43,786 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-10-24 16:05:43,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:05:43,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-10-24 16:05:43,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=2413, Unknown=0, NotChecked=0, Total=2550 [2024-10-24 16:05:43,787 INFO L87 Difference]: Start difference. First operand 556 states and 627 transitions. Second operand has 51 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 51 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:05:46,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:05:46,082 INFO L93 Difference]: Finished difference Result 852 states and 941 transitions. [2024-10-24 16:05:46,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2024-10-24 16:05:46,082 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 51 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 50 [2024-10-24 16:05:46,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:05:46,084 INFO L225 Difference]: With dead ends: 852 [2024-10-24 16:05:46,084 INFO L226 Difference]: Without dead ends: 762 [2024-10-24 16:05:46,085 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1564 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=456, Invalid=8286, Unknown=0, NotChecked=0, Total=8742 [2024-10-24 16:05:46,085 INFO L432 NwaCegarLoop]: 67 mSDtfsCounter, 117 mSDsluCounter, 2371 mSDsCounter, 0 mSdLazyCounter, 3859 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 2438 SdHoareTripleChecker+Invalid, 3898 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 3859 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-10-24 16:05:46,085 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 2438 Invalid, 3898 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 3859 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-10-24 16:05:46,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2024-10-24 16:05:46,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 626. [2024-10-24 16:05:46,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 626 states, 623 states have (on average 1.1332263242375602) internal successors, (706), 625 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:05:46,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 706 transitions. [2024-10-24 16:05:46,090 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 706 transitions. Word has length 50 [2024-10-24 16:05:46,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:05:46,090 INFO L471 AbstractCegarLoop]: Abstraction has 626 states and 706 transitions. [2024-10-24 16:05:46,090 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 51 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:05:46,090 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 706 transitions. [2024-10-24 16:05:46,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-10-24 16:05:46,091 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:05:46,091 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:05:46,105 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2024-10-24 16:05:46,291 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2024-10-24 16:05:46,291 INFO L396 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-24 16:05:46,291 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:05:46,292 INFO L85 PathProgramCache]: Analyzing trace with hash 135837079, now seen corresponding path program 4 times [2024-10-24 16:05:46,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:05:46,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164552640] [2024-10-24 16:05:46,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:05:46,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:05:46,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:05:46,994 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-24 16:05:46,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:05:46,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164552640] [2024-10-24 16:05:46,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164552640] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:05:46,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32858360] [2024-10-24 16:05:46,994 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-24 16:05:46,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:05:46,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:05:46,995 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:05:46,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-10-24 16:05:47,177 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-24 16:05:47,177 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 16:05:47,180 INFO L255 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 88 conjuncts are in the unsatisfiable core [2024-10-24 16:05:47,182 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:05:47,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-24 16:05:47,229 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2024-10-24 16:05:47,232 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-10-24 16:05:48,658 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 4 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:05:48,658 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:05:49,825 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-24 16:05:49,947 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 9 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:05:49,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32858360] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:05:49,947 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:05:49,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 24, 24] total 67 [2024-10-24 16:05:49,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530367270] [2024-10-24 16:05:49,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:05:49,948 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2024-10-24 16:05:49,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:05:49,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2024-10-24 16:05:49,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=443, Invalid=4249, Unknown=0, NotChecked=0, Total=4692 [2024-10-24 16:05:49,949 INFO L87 Difference]: Start difference. First operand 626 states and 706 transitions. Second operand has 69 states, 68 states have (on average 2.1470588235294117) internal successors, (146), 68 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)