./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/subseq-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 3061b6dc Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/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 ../sv-benchmarks/c/array-memsafety/subseq-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 332083c9703e7f789c3b57b3574f68dffe1c5555ad9f8a0d56f0eaba0a86f436 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-3061b6d-m [2024-11-19 06:33:17,417 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-19 06:33:17,470 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-19 06:33:17,474 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-19 06:33:17,474 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-19 06:33:17,489 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-19 06:33:17,490 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-19 06:33:17,491 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-19 06:33:17,492 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-19 06:33:17,492 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-19 06:33:17,493 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-19 06:33:17,493 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-19 06:33:17,493 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-19 06:33:17,494 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-19 06:33:17,495 INFO L153 SettingsManager]: * Use SBE=true [2024-11-19 06:33:17,495 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-19 06:33:17,496 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-19 06:33:17,496 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-19 06:33:17,496 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-19 06:33:17,497 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-19 06:33:17,499 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-19 06:33:17,500 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-19 06:33:17,500 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-19 06:33:17,500 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-19 06:33:17,500 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-19 06:33:17,500 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-19 06:33:17,501 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-19 06:33:17,501 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-19 06:33:17,501 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-19 06:33:17,501 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-19 06:33:17,501 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-19 06:33:17,501 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-19 06:33:17,501 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-19 06:33:17,502 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 06:33:17,502 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-19 06:33:17,502 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-19 06:33:17,502 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-19 06:33:17,502 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-19 06:33:17,502 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-19 06:33:17,503 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-19 06:33:17,503 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-19 06:33:17,505 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-19 06:33:17,505 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 332083c9703e7f789c3b57b3574f68dffe1c5555ad9f8a0d56f0eaba0a86f436 [2024-11-19 06:33:17,720 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-19 06:33:17,745 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-19 06:33:17,748 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-19 06:33:17,749 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-19 06:33:17,750 INFO L274 PluginConnector]: CDTParser initialized [2024-11-19 06:33:17,750 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/subseq-alloca-2.i [2024-11-19 06:33:19,103 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-19 06:33:19,288 INFO L384 CDTParser]: Found 1 translation units. [2024-11-19 06:33:19,288 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/subseq-alloca-2.i [2024-11-19 06:33:19,299 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f8147384/b9721baec1ab4537bd53ea2fbfba10b7/FLAG11bda406e [2024-11-19 06:33:19,653 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f8147384/b9721baec1ab4537bd53ea2fbfba10b7 [2024-11-19 06:33:19,656 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-19 06:33:19,657 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-19 06:33:19,658 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-19 06:33:19,658 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-19 06:33:19,666 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-19 06:33:19,667 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:33:19" (1/1) ... [2024-11-19 06:33:19,668 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11196072 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:33:19, skipping insertion in model container [2024-11-19 06:33:19,668 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:33:19" (1/1) ... [2024-11-19 06:33:19,707 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-19 06:33:20,049 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-19 06:33:20,051 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-19 06:33:20,055 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 06:33:20,075 INFO L200 MainTranslator]: Completed pre-run [2024-11-19 06:33:20,147 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 06:33:20,187 INFO L204 MainTranslator]: Completed translation [2024-11-19 06:33:20,188 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:33:20 WrapperNode [2024-11-19 06:33:20,188 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-19 06:33:20,189 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-19 06:33:20,189 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-19 06:33:20,189 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-19 06:33:20,200 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:33:20" (1/1) ... [2024-11-19 06:33:20,214 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:33:20" (1/1) ... [2024-11-19 06:33:20,245 INFO L138 Inliner]: procedures = 117, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 102 [2024-11-19 06:33:20,246 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-19 06:33:20,250 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-19 06:33:20,250 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-19 06:33:20,250 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-19 06:33:20,258 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:33:20" (1/1) ... [2024-11-19 06:33:20,259 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:33:20" (1/1) ... [2024-11-19 06:33:20,263 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:33:20" (1/1) ... [2024-11-19 06:33:20,282 INFO L175 MemorySlicer]: Split 9 memory accesses to 2 slices as follows [4, 5]. 56 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0, 0]. The 4 writes are split as follows [2, 2]. [2024-11-19 06:33:20,286 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:33:20" (1/1) ... [2024-11-19 06:33:20,286 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:33:20" (1/1) ... [2024-11-19 06:33:20,291 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:33:20" (1/1) ... [2024-11-19 06:33:20,297 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:33:20" (1/1) ... [2024-11-19 06:33:20,299 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:33:20" (1/1) ... [2024-11-19 06:33:20,300 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:33:20" (1/1) ... [2024-11-19 06:33:20,302 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-19 06:33:20,303 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-19 06:33:20,304 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-19 06:33:20,304 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-19 06:33:20,304 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:33:20" (1/1) ... [2024-11-19 06:33:20,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 06:33:20,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 06:33:20,333 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-19 06:33:20,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-19 06:33:20,378 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-19 06:33:20,378 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-19 06:33:20,378 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-19 06:33:20,379 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-19 06:33:20,379 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-19 06:33:20,379 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-19 06:33:20,379 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-19 06:33:20,379 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-19 06:33:20,465 INFO L238 CfgBuilder]: Building ICFG [2024-11-19 06:33:20,467 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-19 06:33:20,630 INFO L? ?]: Removed 61 outVars from TransFormulas that were not future-live. [2024-11-19 06:33:20,630 INFO L287 CfgBuilder]: Performing block encoding [2024-11-19 06:33:20,640 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-19 06:33:20,640 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-19 06:33:20,641 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:33:20 BoogieIcfgContainer [2024-11-19 06:33:20,641 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-19 06:33:20,643 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-19 06:33:20,643 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-19 06:33:20,648 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-19 06:33:20,648 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 06:33:19" (1/3) ... [2024-11-19 06:33:20,649 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61ea8551 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:33:20, skipping insertion in model container [2024-11-19 06:33:20,649 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:33:20" (2/3) ... [2024-11-19 06:33:20,649 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61ea8551 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:33:20, skipping insertion in model container [2024-11-19 06:33:20,649 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:33:20" (3/3) ... [2024-11-19 06:33:20,650 INFO L112 eAbstractionObserver]: Analyzing ICFG subseq-alloca-2.i [2024-11-19 06:33:20,664 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-19 06:33:20,664 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 19 error locations. [2024-11-19 06:33:20,699 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-19 06:33:20,704 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;@1b116724, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-19 06:33:20,704 INFO L334 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2024-11-19 06:33:20,707 INFO L276 IsEmpty]: Start isEmpty. Operand has 53 states, 33 states have (on average 1.9090909090909092) internal successors, (63), 52 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:33:20,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-19 06:33:20,712 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:33:20,712 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-19 06:33:20,712 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 06:33:20,716 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:33:20,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1805029096, now seen corresponding path program 1 times [2024-11-19 06:33:20,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:33:20,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778701978] [2024-11-19 06:33:20,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:33:20,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:33:20,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:33:20,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 06:33:20,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:33:20,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778701978] [2024-11-19 06:33:20,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778701978] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 06:33:20,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 06:33:20,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-19 06:33:20,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584076732] [2024-11-19 06:33:20,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 06:33:20,901 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 06:33:20,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:33:20,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 06:33:20,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-19 06:33:20,924 INFO L87 Difference]: Start difference. First operand has 53 states, 33 states have (on average 1.9090909090909092) internal successors, (63), 52 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:33:20,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:33:21,001 INFO L93 Difference]: Finished difference Result 66 states and 76 transitions. [2024-11-19 06:33:21,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 06:33:21,003 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-19 06:33:21,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:33:21,031 INFO L225 Difference]: With dead ends: 66 [2024-11-19 06:33:21,031 INFO L226 Difference]: Without dead ends: 64 [2024-11-19 06:33:21,032 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-19 06:33:21,035 INFO L432 NwaCegarLoop]: 56 mSDtfsCounter, 12 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 06:33:21,035 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 154 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 06:33:21,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-11-19 06:33:21,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 54. [2024-11-19 06:33:21,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 35 states have (on average 1.7714285714285714) internal successors, (62), 53 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:33:21,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2024-11-19 06:33:21,059 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 7 [2024-11-19 06:33:21,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:33:21,060 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2024-11-19 06:33:21,060 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:33:21,060 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2024-11-19 06:33:21,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-19 06:33:21,060 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:33:21,061 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-19 06:33:21,061 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-19 06:33:21,061 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)] === [2024-11-19 06:33:21,061 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:33:21,062 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876138, now seen corresponding path program 1 times [2024-11-19 06:33:21,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:33:21,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426526990] [2024-11-19 06:33:21,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:33:21,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:33:21,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:33:21,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 06:33:21,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:33:21,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426526990] [2024-11-19 06:33:21,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426526990] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 06:33:21,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 06:33:21,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 06:33:21,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270500958] [2024-11-19 06:33:21,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 06:33:21,163 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 06:33:21,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:33:21,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 06:33:21,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 06:33:21,163 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:33:21,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:33:21,215 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2024-11-19 06:33:21,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 06:33:21,217 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-19 06:33:21,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:33:21,218 INFO L225 Difference]: With dead ends: 52 [2024-11-19 06:33:21,218 INFO L226 Difference]: Without dead ends: 52 [2024-11-19 06:33:21,218 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 06:33:21,219 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 17 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-19 06:33:21,219 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 67 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-19 06:33:21,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-11-19 06:33:21,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2024-11-19 06:33:21,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 35 states have (on average 1.7142857142857142) internal successors, (60), 51 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:33:21,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2024-11-19 06:33:21,226 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 7 [2024-11-19 06:33:21,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:33:21,226 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2024-11-19 06:33:21,227 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:33:21,227 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2024-11-19 06:33:21,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-19 06:33:21,227 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:33:21,227 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-19 06:33:21,227 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-19 06:33:21,228 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 06:33:21,228 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:33:21,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876139, now seen corresponding path program 1 times [2024-11-19 06:33:21,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:33:21,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724454441] [2024-11-19 06:33:21,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:33:21,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:33:21,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:33:21,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 06:33:21,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:33:21,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724454441] [2024-11-19 06:33:21,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724454441] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 06:33:21,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 06:33:21,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-19 06:33:21,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261170393] [2024-11-19 06:33:21,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 06:33:21,397 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 06:33:21,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:33:21,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 06:33:21,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-19 06:33:21,398 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:33:21,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:33:21,456 INFO L93 Difference]: Finished difference Result 56 states and 65 transitions. [2024-11-19 06:33:21,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 06:33:21,457 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-19 06:33:21,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:33:21,458 INFO L225 Difference]: With dead ends: 56 [2024-11-19 06:33:21,458 INFO L226 Difference]: Without dead ends: 56 [2024-11-19 06:33:21,458 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-19 06:33:21,459 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 26 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 118 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 [2024-11-19 06:33:21,459 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 118 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-19 06:33:21,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-11-19 06:33:21,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2024-11-19 06:33:21,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 37 states have (on average 1.7027027027027026) internal successors, (63), 53 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:33:21,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2024-11-19 06:33:21,463 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 7 [2024-11-19 06:33:21,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:33:21,463 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2024-11-19 06:33:21,463 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:33:21,463 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2024-11-19 06:33:21,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-19 06:33:21,464 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:33:21,464 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 06:33:21,464 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-19 06:33:21,464 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 06:33:21,465 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:33:21,465 INFO L85 PathProgramCache]: Analyzing trace with hash -533876908, now seen corresponding path program 1 times [2024-11-19 06:33:21,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:33:21,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654869839] [2024-11-19 06:33:21,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:33:21,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:33:21,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:33:21,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 06:33:21,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:33:21,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654869839] [2024-11-19 06:33:21,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654869839] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 06:33:21,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 06:33:21,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-19 06:33:21,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508532749] [2024-11-19 06:33:21,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 06:33:21,507 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 06:33:21,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:33:21,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 06:33:21,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-19 06:33:21,508 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:33:21,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:33:21,523 INFO L93 Difference]: Finished difference Result 71 states and 83 transitions. [2024-11-19 06:33:21,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 06:33:21,524 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-11-19 06:33:21,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:33:21,524 INFO L225 Difference]: With dead ends: 71 [2024-11-19 06:33:21,524 INFO L226 Difference]: Without dead ends: 71 [2024-11-19 06:33:21,525 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-19 06:33:21,526 INFO L432 NwaCegarLoop]: 52 mSDtfsCounter, 10 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-19 06:33:21,526 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 109 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-19 06:33:21,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-11-19 06:33:21,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 65. [2024-11-19 06:33:21,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 48 states have (on average 1.6041666666666667) internal successors, (77), 64 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) [2024-11-19 06:33:21,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 77 transitions. [2024-11-19 06:33:21,530 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 77 transitions. Word has length 9 [2024-11-19 06:33:21,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:33:21,531 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 77 transitions. [2024-11-19 06:33:21,531 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:33:21,531 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 77 transitions. [2024-11-19 06:33:21,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-19 06:33:21,531 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:33:21,532 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 06:33:21,532 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-19 06:33:21,532 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 06:33:21,533 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:33:21,533 INFO L85 PathProgramCache]: Analyzing trace with hash -476618606, now seen corresponding path program 1 times [2024-11-19 06:33:21,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:33:21,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072605548] [2024-11-19 06:33:21,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:33:21,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:33:21,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:33:21,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 06:33:21,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:33:21,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072605548] [2024-11-19 06:33:21,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072605548] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 06:33:21,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 06:33:21,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 06:33:21,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245715973] [2024-11-19 06:33:21,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 06:33:21,592 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 06:33:21,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:33:21,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 06:33:21,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 06:33:21,593 INFO L87 Difference]: Start difference. First operand 65 states and 77 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:33:21,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:33:21,628 INFO L93 Difference]: Finished difference Result 63 states and 75 transitions. [2024-11-19 06:33:21,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 06:33:21,629 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-11-19 06:33:21,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:33:21,630 INFO L225 Difference]: With dead ends: 63 [2024-11-19 06:33:21,633 INFO L226 Difference]: Without dead ends: 63 [2024-11-19 06:33:21,633 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 06:33:21,634 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 13 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-19 06:33:21,635 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 67 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-19 06:33:21,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-11-19 06:33:21,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2024-11-19 06:33:21,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 48 states have (on average 1.5625) internal successors, (75), 62 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) [2024-11-19 06:33:21,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 75 transitions. [2024-11-19 06:33:21,640 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 75 transitions. Word has length 9 [2024-11-19 06:33:21,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:33:21,641 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 75 transitions. [2024-11-19 06:33:21,642 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:33:21,642 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 75 transitions. [2024-11-19 06:33:21,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-19 06:33:21,643 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:33:21,643 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 06:33:21,643 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-19 06:33:21,643 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 06:33:21,644 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:33:21,645 INFO L85 PathProgramCache]: Analyzing trace with hash -476618605, now seen corresponding path program 1 times [2024-11-19 06:33:21,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:33:21,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972489755] [2024-11-19 06:33:21,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:33:21,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:33:21,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:33:21,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 06:33:21,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:33:21,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972489755] [2024-11-19 06:33:21,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972489755] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 06:33:21,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 06:33:21,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-19 06:33:21,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485243905] [2024-11-19 06:33:21,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 06:33:21,802 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-19 06:33:21,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:33:21,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-19 06:33:21,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-19 06:33:21,803 INFO L87 Difference]: Start difference. First operand 63 states and 75 transitions. Second operand has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:33:21,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:33:21,869 INFO L93 Difference]: Finished difference Result 67 states and 80 transitions. [2024-11-19 06:33:21,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 06:33:21,870 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-11-19 06:33:21,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:33:21,870 INFO L225 Difference]: With dead ends: 67 [2024-11-19 06:33:21,871 INFO L226 Difference]: Without dead ends: 67 [2024-11-19 06:33:21,871 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-11-19 06:33:21,872 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 37 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 06:33:21,872 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 124 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 06:33:21,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-11-19 06:33:21,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2024-11-19 06:33:21,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 50 states have (on average 1.56) internal successors, (78), 64 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:33:21,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 78 transitions. [2024-11-19 06:33:21,875 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 78 transitions. Word has length 9 [2024-11-19 06:33:21,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:33:21,875 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 78 transitions. [2024-11-19 06:33:21,875 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:33:21,876 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 78 transitions. [2024-11-19 06:33:21,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-19 06:33:21,876 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:33:21,876 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 06:33:21,876 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-19 06:33:21,876 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 06:33:21,877 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:33:21,877 INFO L85 PathProgramCache]: Analyzing trace with hash 629683416, now seen corresponding path program 1 times [2024-11-19 06:33:21,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:33:21,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176911461] [2024-11-19 06:33:21,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:33:21,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:33:21,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:33:21,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 06:33:21,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:33:21,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176911461] [2024-11-19 06:33:21,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176911461] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 06:33:21,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 06:33:21,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 06:33:21,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65019875] [2024-11-19 06:33:21,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 06:33:21,993 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 06:33:21,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:33:21,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 06:33:21,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-19 06:33:21,993 INFO L87 Difference]: Start difference. First operand 65 states and 78 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:33:22,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:33:22,014 INFO L93 Difference]: Finished difference Result 77 states and 92 transitions. [2024-11-19 06:33:22,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 06:33:22,015 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-11-19 06:33:22,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:33:22,019 INFO L225 Difference]: With dead ends: 77 [2024-11-19 06:33:22,019 INFO L226 Difference]: Without dead ends: 77 [2024-11-19 06:33:22,019 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-19 06:33:22,019 INFO L432 NwaCegarLoop]: 49 mSDtfsCounter, 11 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-19 06:33:22,020 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 97 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-19 06:33:22,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-11-19 06:33:22,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2024-11-19 06:33:22,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 61 states have (on average 1.5081967213114753) internal successors, (92), 75 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) [2024-11-19 06:33:22,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 92 transitions. [2024-11-19 06:33:22,028 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 92 transitions. Word has length 10 [2024-11-19 06:33:22,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:33:22,028 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 92 transitions. [2024-11-19 06:33:22,028 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:33:22,028 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 92 transitions. [2024-11-19 06:33:22,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-19 06:33:22,028 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:33:22,028 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 06:33:22,029 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-19 06:33:22,029 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 06:33:22,029 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:33:22,029 INFO L85 PathProgramCache]: Analyzing trace with hash -179663210, now seen corresponding path program 1 times [2024-11-19 06:33:22,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:33:22,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17806296] [2024-11-19 06:33:22,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:33:22,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:33:22,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:33:22,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 06:33:22,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:33:22,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17806296] [2024-11-19 06:33:22,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17806296] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 06:33:22,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 06:33:22,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-19 06:33:22,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462664558] [2024-11-19 06:33:22,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 06:33:22,229 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 06:33:22,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:33:22,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 06:33:22,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-19 06:33:22,230 INFO L87 Difference]: Start difference. First operand 76 states and 92 transitions. Second operand has 5 states, 4 states have (on average 2.5) 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) [2024-11-19 06:33:22,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:33:22,378 INFO L93 Difference]: Finished difference Result 92 states and 110 transitions. [2024-11-19 06:33:22,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 06:33:22,378 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) 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 [2024-11-19 06:33:22,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:33:22,379 INFO L225 Difference]: With dead ends: 92 [2024-11-19 06:33:22,379 INFO L226 Difference]: Without dead ends: 92 [2024-11-19 06:33:22,379 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-19 06:33:22,382 INFO L432 NwaCegarLoop]: 45 mSDtfsCounter, 27 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 06:33:22,382 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 113 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 06:33:22,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-11-19 06:33:22,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 76. [2024-11-19 06:33:22,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 61 states have (on average 1.5081967213114753) internal successors, (92), 75 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) [2024-11-19 06:33:22,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 92 transitions. [2024-11-19 06:33:22,386 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 92 transitions. Word has length 10 [2024-11-19 06:33:22,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:33:22,390 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 92 transitions. [2024-11-19 06:33:22,390 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) 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) [2024-11-19 06:33:22,390 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 92 transitions. [2024-11-19 06:33:22,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-19 06:33:22,391 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:33:22,391 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 06:33:22,391 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-19 06:33:22,391 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 06:33:22,391 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:33:22,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1954650589, now seen corresponding path program 1 times [2024-11-19 06:33:22,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:33:22,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704933099] [2024-11-19 06:33:22,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:33:22,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:33:22,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:33:22,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 06:33:22,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:33:22,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704933099] [2024-11-19 06:33:22,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704933099] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 06:33:22,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 06:33:22,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 06:33:22,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61667009] [2024-11-19 06:33:22,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 06:33:22,505 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 06:33:22,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:33:22,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 06:33:22,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-19 06:33:22,506 INFO L87 Difference]: Start difference. First operand 76 states and 92 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:33:22,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:33:22,540 INFO L93 Difference]: Finished difference Result 83 states and 98 transitions. [2024-11-19 06:33:22,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 06:33:22,541 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-11-19 06:33:22,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:33:22,541 INFO L225 Difference]: With dead ends: 83 [2024-11-19 06:33:22,542 INFO L226 Difference]: Without dead ends: 83 [2024-11-19 06:33:22,542 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-19 06:33:22,542 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 6 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-19 06:33:22,543 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 122 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-19 06:33:22,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2024-11-19 06:33:22,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 81. [2024-11-19 06:33:22,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 66 states have (on average 1.4848484848484849) internal successors, (98), 80 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:33:22,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 98 transitions. [2024-11-19 06:33:22,546 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 98 transitions. Word has length 11 [2024-11-19 06:33:22,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:33:22,546 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 98 transitions. [2024-11-19 06:33:22,547 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:33:22,547 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 98 transitions. [2024-11-19 06:33:22,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-19 06:33:22,547 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:33:22,547 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 06:33:22,548 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-19 06:33:22,548 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 06:33:22,548 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:33:22,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1530970081, now seen corresponding path program 1 times [2024-11-19 06:33:22,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:33:22,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130529547] [2024-11-19 06:33:22,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:33:22,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:33:22,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:33:22,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 06:33:22,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:33:22,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130529547] [2024-11-19 06:33:22,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130529547] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 06:33:22,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 06:33:22,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-19 06:33:22,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819134802] [2024-11-19 06:33:22,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 06:33:22,629 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 06:33:22,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:33:22,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 06:33:22,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-19 06:33:22,630 INFO L87 Difference]: Start difference. First operand 81 states and 98 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:33:22,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:33:22,647 INFO L93 Difference]: Finished difference Result 80 states and 97 transitions. [2024-11-19 06:33:22,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 06:33:22,648 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-11-19 06:33:22,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:33:22,648 INFO L225 Difference]: With dead ends: 80 [2024-11-19 06:33:22,648 INFO L226 Difference]: Without dead ends: 80 [2024-11-19 06:33:22,649 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-19 06:33:22,649 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 22 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-19 06:33:22,649 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 103 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-19 06:33:22,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2024-11-19 06:33:22,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 75. [2024-11-19 06:33:22,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 61 states have (on average 1.4918032786885247) internal successors, (91), 74 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:33:22,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 91 transitions. [2024-11-19 06:33:22,652 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 91 transitions. Word has length 11 [2024-11-19 06:33:22,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:33:22,653 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 91 transitions. [2024-11-19 06:33:22,653 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:33:22,653 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 91 transitions. [2024-11-19 06:33:22,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-19 06:33:22,653 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:33:22,653 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 06:33:22,654 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-19 06:33:22,654 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 06:33:22,654 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:33:22,654 INFO L85 PathProgramCache]: Analyzing trace with hash -1226025170, now seen corresponding path program 1 times [2024-11-19 06:33:22,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:33:22,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638869249] [2024-11-19 06:33:22,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:33:22,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:33:22,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:33:22,786 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 06:33:22,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:33:22,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638869249] [2024-11-19 06:33:22,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638869249] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 06:33:22,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828571639] [2024-11-19 06:33:22,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:33:22,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 06:33:22,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 06:33:22,793 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 06:33:22,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-19 06:33:22,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:33:22,863 INFO L255 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-19 06:33:22,866 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 06:33:22,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 06:33:22,934 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2024-11-19 06:33:22,949 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-19 06:33:23,096 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 06:33:23,097 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 06:33:23,206 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-19 06:33:23,223 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 06:33:23,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828571639] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 06:33:23,223 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 06:33:23,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-11-19 06:33:23,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767992583] [2024-11-19 06:33:23,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 06:33:23,224 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-19 06:33:23,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:33:23,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-19 06:33:23,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2024-11-19 06:33:23,225 INFO L87 Difference]: Start difference. First operand 75 states and 91 transitions. Second operand has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:33:23,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:33:23,366 INFO L93 Difference]: Finished difference Result 80 states and 97 transitions. [2024-11-19 06:33:23,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-19 06:33:23,366 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-11-19 06:33:23,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:33:23,367 INFO L225 Difference]: With dead ends: 80 [2024-11-19 06:33:23,367 INFO L226 Difference]: Without dead ends: 80 [2024-11-19 06:33:23,367 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2024-11-19 06:33:23,368 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 20 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 06:33:23,368 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 196 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 06:33:23,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2024-11-19 06:33:23,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 72. [2024-11-19 06:33:23,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 59 states have (on average 1.4745762711864407) internal successors, (87), 71 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:33:23,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 87 transitions. [2024-11-19 06:33:23,370 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 87 transitions. Word has length 11 [2024-11-19 06:33:23,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:33:23,371 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 87 transitions. [2024-11-19 06:33:23,371 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:33:23,371 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 87 transitions. [2024-11-19 06:33:23,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-19 06:33:23,371 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:33:23,372 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 06:33:23,386 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-19 06:33:23,575 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-19 06:33:23,576 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 06:33:23,576 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:33:23,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1518507737, now seen corresponding path program 1 times [2024-11-19 06:33:23,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:33:23,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827901950] [2024-11-19 06:33:23,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:33:23,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:33:23,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:33:23,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 06:33:23,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:33:23,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827901950] [2024-11-19 06:33:23,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827901950] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 06:33:23,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 06:33:23,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 06:33:23,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036175029] [2024-11-19 06:33:23,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 06:33:23,638 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 06:33:23,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:33:23,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 06:33:23,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 06:33:23,639 INFO L87 Difference]: Start difference. First operand 72 states and 87 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 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) [2024-11-19 06:33:23,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:33:23,691 INFO L93 Difference]: Finished difference Result 70 states and 85 transitions. [2024-11-19 06:33:23,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 06:33:23,691 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 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 [2024-11-19 06:33:23,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:33:23,692 INFO L225 Difference]: With dead ends: 70 [2024-11-19 06:33:23,692 INFO L226 Difference]: Without dead ends: 70 [2024-11-19 06:33:23,692 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 06:33:23,693 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 34 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-19 06:33:23,696 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 64 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-19 06:33:23,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-11-19 06:33:23,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2024-11-19 06:33:23,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 59 states have (on average 1.4406779661016949) internal successors, (85), 69 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:33:23,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 85 transitions. [2024-11-19 06:33:23,699 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 85 transitions. Word has length 13 [2024-11-19 06:33:23,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:33:23,700 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 85 transitions. [2024-11-19 06:33:23,700 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 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) [2024-11-19 06:33:23,701 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 85 transitions. [2024-11-19 06:33:23,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-19 06:33:23,701 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:33:23,704 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 06:33:23,704 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-19 06:33:23,704 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 06:33:23,705 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:33:23,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1518507736, now seen corresponding path program 1 times [2024-11-19 06:33:23,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:33:23,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130103607] [2024-11-19 06:33:23,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:33:23,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:33:23,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:33:23,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 06:33:23,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:33:23,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130103607] [2024-11-19 06:33:23,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130103607] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 06:33:23,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 06:33:23,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-19 06:33:23,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316640244] [2024-11-19 06:33:23,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 06:33:23,832 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-19 06:33:23,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:33:23,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-19 06:33:23,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-19 06:33:23,833 INFO L87 Difference]: Start difference. First operand 70 states and 85 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) [2024-11-19 06:33:23,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:33:23,939 INFO L93 Difference]: Finished difference Result 92 states and 110 transitions. [2024-11-19 06:33:23,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-19 06:33:23,940 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 [2024-11-19 06:33:23,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:33:23,940 INFO L225 Difference]: With dead ends: 92 [2024-11-19 06:33:23,940 INFO L226 Difference]: Without dead ends: 92 [2024-11-19 06:33:23,940 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-19 06:33:23,941 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 43 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 06:33:23,941 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 141 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 06:33:23,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-11-19 06:33:23,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 80. [2024-11-19 06:33:23,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 69 states have (on average 1.4782608695652173) internal successors, (102), 79 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:33:23,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 102 transitions. [2024-11-19 06:33:23,943 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 102 transitions. Word has length 13 [2024-11-19 06:33:23,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:33:23,943 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 102 transitions. [2024-11-19 06:33:23,944 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) [2024-11-19 06:33:23,944 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 102 transitions. [2024-11-19 06:33:23,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-19 06:33:23,944 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:33:23,944 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 06:33:23,944 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-19 06:33:23,944 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 06:33:23,945 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:33:23,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1862804906, now seen corresponding path program 1 times [2024-11-19 06:33:23,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:33:23,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640076557] [2024-11-19 06:33:23,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:33:23,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:33:23,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:33:24,070 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 06:33:24,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:33:24,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640076557] [2024-11-19 06:33:24,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640076557] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 06:33:24,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756973025] [2024-11-19 06:33:24,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:33:24,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 06:33:24,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 06:33:24,075 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) [2024-11-19 06:33:24,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-19 06:33:24,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:33:24,121 INFO L255 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-19 06:33:24,122 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 06:33:24,136 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-11-19 06:33:24,142 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-19 06:33:24,259 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 06:33:24,259 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 06:33:24,425 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 06:33:24,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756973025] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 06:33:24,426 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 06:33:24,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2024-11-19 06:33:24,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77646458] [2024-11-19 06:33:24,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 06:33:24,426 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-19 06:33:24,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:33:24,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-19 06:33:24,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2024-11-19 06:33:24,427 INFO L87 Difference]: Start difference. First operand 80 states and 102 transitions. Second operand has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:33:24,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:33:24,617 INFO L93 Difference]: Finished difference Result 85 states and 108 transitions. [2024-11-19 06:33:24,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-19 06:33:24,617 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-11-19 06:33:24,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:33:24,620 INFO L225 Difference]: With dead ends: 85 [2024-11-19 06:33:24,620 INFO L226 Difference]: Without dead ends: 85 [2024-11-19 06:33:24,621 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2024-11-19 06:33:24,621 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 18 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 06:33:24,621 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 208 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 06:33:24,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2024-11-19 06:33:24,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 75. [2024-11-19 06:33:24,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 65 states have (on average 1.4461538461538461) internal successors, (94), 74 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:33:24,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 94 transitions. [2024-11-19 06:33:24,625 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 94 transitions. Word has length 13 [2024-11-19 06:33:24,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:33:24,625 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 94 transitions. [2024-11-19 06:33:24,626 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:33:24,626 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 94 transitions. [2024-11-19 06:33:24,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-19 06:33:24,626 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:33:24,626 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 06:33:24,640 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-19 06:33:24,827 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,SelfDestructingSolverStorable13 [2024-11-19 06:33:24,827 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 06:33:24,828 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:33:24,828 INFO L85 PathProgramCache]: Analyzing trace with hash -115553677, now seen corresponding path program 1 times [2024-11-19 06:33:24,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:33:24,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570722224] [2024-11-19 06:33:24,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:33:24,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:33:24,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:33:24,982 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 06:33:24,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:33:24,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570722224] [2024-11-19 06:33:24,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570722224] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 06:33:24,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 06:33:24,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-19 06:33:24,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146003087] [2024-11-19 06:33:24,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 06:33:24,983 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-19 06:33:24,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:33:24,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-19 06:33:24,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-19 06:33:24,984 INFO L87 Difference]: Start difference. First operand 75 states and 94 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:33:25,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:33:25,016 INFO L93 Difference]: Finished difference Result 74 states and 93 transitions. [2024-11-19 06:33:25,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 06:33:25,017 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-11-19 06:33:25,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:33:25,017 INFO L225 Difference]: With dead ends: 74 [2024-11-19 06:33:25,017 INFO L226 Difference]: Without dead ends: 74 [2024-11-19 06:33:25,018 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-19 06:33:25,018 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 10 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-19 06:33:25,018 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 92 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-19 06:33:25,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-11-19 06:33:25,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 63. [2024-11-19 06:33:25,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 54 states have (on average 1.462962962962963) internal successors, (79), 62 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:33:25,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 79 transitions. [2024-11-19 06:33:25,019 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 79 transitions. Word has length 14 [2024-11-19 06:33:25,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:33:25,020 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 79 transitions. [2024-11-19 06:33:25,020 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:33:25,020 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 79 transitions. [2024-11-19 06:33:25,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-19 06:33:25,020 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:33:25,020 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 06:33:25,022 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-19 06:33:25,022 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 06:33:25,023 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:33:25,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1026571646, now seen corresponding path program 1 times [2024-11-19 06:33:25,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:33:25,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066195835] [2024-11-19 06:33:25,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:33:25,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:33:25,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:33:25,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 06:33:25,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:33:25,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066195835] [2024-11-19 06:33:25,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066195835] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 06:33:25,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 06:33:25,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 06:33:25,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889976157] [2024-11-19 06:33:25,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 06:33:25,058 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 06:33:25,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:33:25,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 06:33:25,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 06:33:25,058 INFO L87 Difference]: Start difference. First operand 63 states and 79 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:33:25,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:33:25,085 INFO L93 Difference]: Finished difference Result 60 states and 74 transitions. [2024-11-19 06:33:25,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 06:33:25,085 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2024-11-19 06:33:25,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:33:25,085 INFO L225 Difference]: With dead ends: 60 [2024-11-19 06:33:25,085 INFO L226 Difference]: Without dead ends: 60 [2024-11-19 06:33:25,086 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 06:33:25,086 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 24 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-19 06:33:25,086 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 63 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-19 06:33:25,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-11-19 06:33:25,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2024-11-19 06:33:25,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 54 states have (on average 1.3703703703703705) internal successors, (74), 59 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:33:25,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 74 transitions. [2024-11-19 06:33:25,088 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 74 transitions. Word has length 16 [2024-11-19 06:33:25,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:33:25,088 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 74 transitions. [2024-11-19 06:33:25,089 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:33:25,089 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 74 transitions. [2024-11-19 06:33:25,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-19 06:33:25,090 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:33:25,090 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 06:33:25,090 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-19 06:33:25,090 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 06:33:25,090 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:33:25,091 INFO L85 PathProgramCache]: Analyzing trace with hash 1026571647, now seen corresponding path program 1 times [2024-11-19 06:33:25,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:33:25,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304018217] [2024-11-19 06:33:25,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:33:25,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:33:25,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:33:25,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 06:33:25,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:33:25,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304018217] [2024-11-19 06:33:25,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304018217] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 06:33:25,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 06:33:25,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-19 06:33:25,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38626653] [2024-11-19 06:33:25,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 06:33:25,192 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-19 06:33:25,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:33:25,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-19 06:33:25,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-19 06:33:25,192 INFO L87 Difference]: Start difference. First operand 60 states and 74 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) [2024-11-19 06:33:25,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:33:25,275 INFO L93 Difference]: Finished difference Result 77 states and 95 transitions. [2024-11-19 06:33:25,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-19 06:33:25,276 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 [2024-11-19 06:33:25,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:33:25,276 INFO L225 Difference]: With dead ends: 77 [2024-11-19 06:33:25,276 INFO L226 Difference]: Without dead ends: 77 [2024-11-19 06:33:25,276 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-19 06:33:25,277 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 23 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 06:33:25,277 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 123 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 06:33:25,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-11-19 06:33:25,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 69. [2024-11-19 06:33:25,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 63 states have (on average 1.3492063492063493) internal successors, (85), 68 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:33:25,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 85 transitions. [2024-11-19 06:33:25,278 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 85 transitions. Word has length 16 [2024-11-19 06:33:25,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:33:25,278 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 85 transitions. [2024-11-19 06:33:25,278 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) [2024-11-19 06:33:25,279 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 85 transitions. [2024-11-19 06:33:25,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-19 06:33:25,279 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:33:25,279 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 06:33:25,279 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-19 06:33:25,279 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 06:33:25,280 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:33:25,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1835713881, now seen corresponding path program 1 times [2024-11-19 06:33:25,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:33:25,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966047324] [2024-11-19 06:33:25,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:33:25,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:33:25,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:33:25,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 06:33:25,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:33:25,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966047324] [2024-11-19 06:33:25,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966047324] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 06:33:25,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 06:33:25,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 06:33:25,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048470301] [2024-11-19 06:33:25,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 06:33:25,365 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 06:33:25,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:33:25,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 06:33:25,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 06:33:25,366 INFO L87 Difference]: Start difference. First operand 69 states and 85 transitions. Second operand has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:33:25,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:33:25,383 INFO L93 Difference]: Finished difference Result 68 states and 84 transitions. [2024-11-19 06:33:25,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 06:33:25,384 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2024-11-19 06:33:25,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:33:25,385 INFO L225 Difference]: With dead ends: 68 [2024-11-19 06:33:25,385 INFO L226 Difference]: Without dead ends: 64 [2024-11-19 06:33:25,386 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 06:33:25,386 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 25 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-19 06:33:25,387 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 64 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-19 06:33:25,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-11-19 06:33:25,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2024-11-19 06:33:25,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 59 states have (on average 1.3220338983050848) internal successors, (78), 63 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:33:25,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 78 transitions. [2024-11-19 06:33:25,388 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 78 transitions. Word has length 20 [2024-11-19 06:33:25,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:33:25,388 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 78 transitions. [2024-11-19 06:33:25,389 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:33:25,389 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 78 transitions. [2024-11-19 06:33:25,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-19 06:33:25,389 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:33:25,389 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 06:33:25,389 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-19 06:33:25,389 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 06:33:25,390 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:33:25,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1030626472, now seen corresponding path program 1 times [2024-11-19 06:33:25,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:33:25,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570782817] [2024-11-19 06:33:25,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:33:25,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:33:25,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:33:25,409 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 06:33:25,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:33:25,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570782817] [2024-11-19 06:33:25,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570782817] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 06:33:25,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 06:33:25,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 06:33:25,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088633024] [2024-11-19 06:33:25,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 06:33:25,411 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 06:33:25,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:33:25,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 06:33:25,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 06:33:25,412 INFO L87 Difference]: Start difference. First operand 64 states and 78 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:33:25,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:33:25,417 INFO L93 Difference]: Finished difference Result 67 states and 80 transitions. [2024-11-19 06:33:25,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 06:33:25,418 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2024-11-19 06:33:25,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:33:25,418 INFO L225 Difference]: With dead ends: 67 [2024-11-19 06:33:25,418 INFO L226 Difference]: Without dead ends: 66 [2024-11-19 06:33:25,418 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 06:33:25,419 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 0 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-19 06:33:25,419 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 72 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-19 06:33:25,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-11-19 06:33:25,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2024-11-19 06:33:25,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.3) internal successors, (78), 64 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:33:25,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 78 transitions. [2024-11-19 06:33:25,420 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 78 transitions. Word has length 21 [2024-11-19 06:33:25,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:33:25,421 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 78 transitions. [2024-11-19 06:33:25,421 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:33:25,421 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 78 transitions. [2024-11-19 06:33:25,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-19 06:33:25,421 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:33:25,421 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 06:33:25,422 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-19 06:33:25,422 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)] === [2024-11-19 06:33:25,422 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:33:25,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1845558251, now seen corresponding path program 1 times [2024-11-19 06:33:25,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:33:25,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021980203] [2024-11-19 06:33:25,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:33:25,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:33:25,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:33:25,565 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 06:33:25,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:33:25,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021980203] [2024-11-19 06:33:25,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021980203] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 06:33:25,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 06:33:25,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-19 06:33:25,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600845581] [2024-11-19 06:33:25,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 06:33:25,565 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-19 06:33:25,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:33:25,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-19 06:33:25,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-11-19 06:33:25,566 INFO L87 Difference]: Start difference. First operand 65 states and 78 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:33:25,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:33:25,615 INFO L93 Difference]: Finished difference Result 79 states and 92 transitions. [2024-11-19 06:33:25,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-19 06:33:25,615 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2024-11-19 06:33:25,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:33:25,616 INFO L225 Difference]: With dead ends: 79 [2024-11-19 06:33:25,616 INFO L226 Difference]: Without dead ends: 60 [2024-11-19 06:33:25,616 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-11-19 06:33:25,616 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 7 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-19 06:33:25,616 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 210 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-19 06:33:25,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-11-19 06:33:25,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2024-11-19 06:33:25,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 55 states have (on average 1.290909090909091) internal successors, (71), 59 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:33:25,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 71 transitions. [2024-11-19 06:33:25,618 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 71 transitions. Word has length 23 [2024-11-19 06:33:25,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:33:25,618 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 71 transitions. [2024-11-19 06:33:25,618 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:33:25,618 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 71 transitions. [2024-11-19 06:33:25,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-19 06:33:25,618 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:33:25,618 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 06:33:25,618 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-19 06:33:25,618 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 06:33:25,618 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:33:25,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1422856425, now seen corresponding path program 1 times [2024-11-19 06:33:25,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:33:25,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266089290] [2024-11-19 06:33:25,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:33:25,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:33:25,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:33:25,768 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 06:33:25,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:33:25,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266089290] [2024-11-19 06:33:25,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266089290] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 06:33:25,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 06:33:25,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-19 06:33:25,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656343896] [2024-11-19 06:33:25,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 06:33:25,769 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-19 06:33:25,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:33:25,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-19 06:33:25,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-11-19 06:33:25,770 INFO L87 Difference]: Start difference. First operand 60 states and 71 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:33:25,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:33:25,825 INFO L93 Difference]: Finished difference Result 82 states and 95 transitions. [2024-11-19 06:33:25,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-19 06:33:25,825 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2024-11-19 06:33:25,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:33:25,826 INFO L225 Difference]: With dead ends: 82 [2024-11-19 06:33:25,826 INFO L226 Difference]: Without dead ends: 68 [2024-11-19 06:33:25,826 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-11-19 06:33:25,826 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 27 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-19 06:33:25,827 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 179 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-19 06:33:25,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-11-19 06:33:25,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 62. [2024-11-19 06:33:25,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 57 states have (on average 1.280701754385965) internal successors, (73), 61 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:33:25,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 73 transitions. [2024-11-19 06:33:25,828 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 73 transitions. Word has length 23 [2024-11-19 06:33:25,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:33:25,828 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 73 transitions. [2024-11-19 06:33:25,828 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:33:25,828 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 73 transitions. [2024-11-19 06:33:25,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-19 06:33:25,829 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:33:25,829 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 06:33:25,829 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-11-19 06:33:25,829 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 06:33:25,829 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:33:25,829 INFO L85 PathProgramCache]: Analyzing trace with hash 109945434, now seen corresponding path program 1 times [2024-11-19 06:33:25,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:33:25,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093842678] [2024-11-19 06:33:25,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:33:25,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:33:25,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:33:25,934 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 06:33:25,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:33:25,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093842678] [2024-11-19 06:33:25,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093842678] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 06:33:25,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180263063] [2024-11-19 06:33:25,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:33:25,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 06:33:25,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 06:33:25,938 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 06:33:25,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-19 06:33:26,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:33:26,003 INFO L255 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-19 06:33:26,004 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 06:33:26,078 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 06:33:26,079 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 06:33:26,178 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-19 06:33:26,199 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 06:33:26,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180263063] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 06:33:26,199 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 06:33:26,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2024-11-19 06:33:26,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031864048] [2024-11-19 06:33:26,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 06:33:26,200 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-19 06:33:26,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:33:26,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-19 06:33:26,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2024-11-19 06:33:26,201 INFO L87 Difference]: Start difference. First operand 62 states and 73 transitions. Second operand has 17 states, 16 states have (on average 3.875) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:33:26,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:33:26,320 INFO L93 Difference]: Finished difference Result 89 states and 99 transitions. [2024-11-19 06:33:26,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-19 06:33:26,320 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.875) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2024-11-19 06:33:26,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:33:26,321 INFO L225 Difference]: With dead ends: 89 [2024-11-19 06:33:26,321 INFO L226 Difference]: Without dead ends: 89 [2024-11-19 06:33:26,321 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2024-11-19 06:33:26,321 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 45 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 06:33:26,322 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 273 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 06:33:26,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2024-11-19 06:33:26,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 63. [2024-11-19 06:33:26,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 59 states have (on average 1.2542372881355932) internal successors, (74), 62 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:33:26,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 74 transitions. [2024-11-19 06:33:26,323 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 74 transitions. Word has length 27 [2024-11-19 06:33:26,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:33:26,323 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 74 transitions. [2024-11-19 06:33:26,323 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.875) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:33:26,323 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 74 transitions. [2024-11-19 06:33:26,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-19 06:33:26,323 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:33:26,324 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 06:33:26,339 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-19 06:33:26,527 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 06:33:26,528 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 06:33:26,529 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:33:26,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1675616499, now seen corresponding path program 1 times [2024-11-19 06:33:26,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:33:26,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376567490] [2024-11-19 06:33:26,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:33:26,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:33:26,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:33:26,704 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 06:33:26,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:33:26,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376567490] [2024-11-19 06:33:26,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376567490] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 06:33:26,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 06:33:26,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-11-19 06:33:26,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147425435] [2024-11-19 06:33:26,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 06:33:26,705 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-19 06:33:26,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:33:26,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-19 06:33:26,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-11-19 06:33:26,705 INFO L87 Difference]: Start difference. First operand 63 states and 74 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:33:26,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:33:26,795 INFO L93 Difference]: Finished difference Result 77 states and 88 transitions. [2024-11-19 06:33:26,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-19 06:33:26,795 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2024-11-19 06:33:26,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:33:26,795 INFO L225 Difference]: With dead ends: 77 [2024-11-19 06:33:26,796 INFO L226 Difference]: Without dead ends: 77 [2024-11-19 06:33:26,796 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2024-11-19 06:33:26,797 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 15 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 176 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 [2024-11-19 06:33:26,797 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 176 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 06:33:26,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-11-19 06:33:26,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2024-11-19 06:33:26,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 72 states have (on average 1.2083333333333333) internal successors, (87), 75 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:33:26,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 87 transitions. [2024-11-19 06:33:26,799 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 87 transitions. Word has length 30 [2024-11-19 06:33:26,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:33:26,799 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 87 transitions. [2024-11-19 06:33:26,799 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:33:26,799 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 87 transitions. [2024-11-19 06:33:26,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-19 06:33:26,800 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:33:26,800 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 06:33:26,800 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-11-19 06:33:26,800 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 06:33:26,800 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:33:26,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1618358197, now seen corresponding path program 1 times [2024-11-19 06:33:26,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:33:26,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444414368] [2024-11-19 06:33:26,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:33:26,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:33:26,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:33:26,963 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 06:33:26,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:33:26,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444414368] [2024-11-19 06:33:26,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444414368] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 06:33:26,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 06:33:26,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-19 06:33:26,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218155928] [2024-11-19 06:33:26,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 06:33:26,964 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-19 06:33:26,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:33:26,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-19 06:33:26,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-11-19 06:33:26,965 INFO L87 Difference]: Start difference. First operand 76 states and 87 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:33:27,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:33:27,042 INFO L93 Difference]: Finished difference Result 73 states and 83 transitions. [2024-11-19 06:33:27,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-19 06:33:27,043 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2024-11-19 06:33:27,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:33:27,043 INFO L225 Difference]: With dead ends: 73 [2024-11-19 06:33:27,043 INFO L226 Difference]: Without dead ends: 55 [2024-11-19 06:33:27,043 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-11-19 06:33:27,044 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 2 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 06:33:27,044 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 195 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 06:33:27,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-11-19 06:33:27,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2024-11-19 06:33:27,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 51 states have (on average 1.2549019607843137) internal successors, (64), 54 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:33:27,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2024-11-19 06:33:27,045 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 30 [2024-11-19 06:33:27,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:33:27,045 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2024-11-19 06:33:27,045 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:33:27,045 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2024-11-19 06:33:27,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-19 06:33:27,045 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:33:27,045 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 06:33:27,045 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-11-19 06:33:27,045 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 06:33:27,046 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:33:27,046 INFO L85 PathProgramCache]: Analyzing trace with hash 247611535, now seen corresponding path program 1 times [2024-11-19 06:33:27,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:33:27,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476769087] [2024-11-19 06:33:27,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:33:27,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:33:27,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:33:27,451 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 06:33:27,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:33:27,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476769087] [2024-11-19 06:33:27,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476769087] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 06:33:27,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016941816] [2024-11-19 06:33:27,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:33:27,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 06:33:27,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 06:33:27,453 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 06:33:27,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-19 06:33:27,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:33:27,516 INFO L255 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-19 06:33:27,518 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 06:33:27,622 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-19 06:33:27,713 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 06:33:27,713 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 06:33:27,740 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-19 06:33:27,744 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-19 06:33:27,925 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 06:33:27,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016941816] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 06:33:27,925 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 06:33:27,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 24 [2024-11-19 06:33:27,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381131884] [2024-11-19 06:33:27,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 06:33:27,926 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-19 06:33:27,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:33:27,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-19 06:33:27,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2024-11-19 06:33:27,926 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:33:28,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:33:28,793 INFO L93 Difference]: Finished difference Result 125 states and 140 transitions. [2024-11-19 06:33:28,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-11-19 06:33:28,793 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2024-11-19 06:33:28,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:33:28,794 INFO L225 Difference]: With dead ends: 125 [2024-11-19 06:33:28,794 INFO L226 Difference]: Without dead ends: 117 [2024-11-19 06:33:28,795 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=256, Invalid=2194, Unknown=0, NotChecked=0, Total=2450 [2024-11-19 06:33:28,795 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 115 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-19 06:33:28,795 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 302 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-19 06:33:28,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2024-11-19 06:33:28,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 101. [2024-11-19 06:33:28,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 97 states have (on average 1.2164948453608246) internal successors, (118), 100 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:33:28,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 118 transitions. [2024-11-19 06:33:28,797 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 118 transitions. Word has length 30 [2024-11-19 06:33:28,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:33:28,797 INFO L471 AbstractCegarLoop]: Abstraction has 101 states and 118 transitions. [2024-11-19 06:33:28,797 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:33:28,797 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 118 transitions. [2024-11-19 06:33:28,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-19 06:33:28,798 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:33:28,798 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 06:33:28,814 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-19 06:33:28,998 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 06:33:28,999 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 06:33:28,999 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:33:28,999 INFO L85 PathProgramCache]: Analyzing trace with hash 304869837, now seen corresponding path program 1 times [2024-11-19 06:33:29,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:33:29,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63358856] [2024-11-19 06:33:29,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:33:29,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:33:29,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:33:29,147 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 06:33:29,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:33:29,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63358856] [2024-11-19 06:33:29,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63358856] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 06:33:29,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 06:33:29,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-19 06:33:29,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209111694] [2024-11-19 06:33:29,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 06:33:29,148 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-19 06:33:29,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:33:29,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-19 06:33:29,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-19 06:33:29,150 INFO L87 Difference]: Start difference. First operand 101 states and 118 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:33:29,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:33:29,203 INFO L93 Difference]: Finished difference Result 129 states and 146 transitions. [2024-11-19 06:33:29,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-19 06:33:29,204 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2024-11-19 06:33:29,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:33:29,204 INFO L225 Difference]: With dead ends: 129 [2024-11-19 06:33:29,204 INFO L226 Difference]: Without dead ends: 109 [2024-11-19 06:33:29,204 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-11-19 06:33:29,205 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 18 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-19 06:33:29,205 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 177 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-19 06:33:29,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2024-11-19 06:33:29,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 103. [2024-11-19 06:33:29,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 99 states have (on average 1.2121212121212122) internal successors, (120), 102 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:33:29,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 120 transitions. [2024-11-19 06:33:29,206 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 120 transitions. Word has length 30 [2024-11-19 06:33:29,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:33:29,206 INFO L471 AbstractCegarLoop]: Abstraction has 103 states and 120 transitions. [2024-11-19 06:33:29,206 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:33:29,207 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 120 transitions. [2024-11-19 06:33:29,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-19 06:33:29,207 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:33:29,207 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 06:33:29,207 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-11-19 06:33:29,207 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)] === [2024-11-19 06:33:29,209 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:33:29,209 INFO L85 PathProgramCache]: Analyzing trace with hash 1630343402, now seen corresponding path program 1 times [2024-11-19 06:33:29,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:33:29,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412135097] [2024-11-19 06:33:29,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:33:29,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:33:29,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:33:29,453 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 06:33:29,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:33:29,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412135097] [2024-11-19 06:33:29,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412135097] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 06:33:29,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449705840] [2024-11-19 06:33:29,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:33:29,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 06:33:29,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 06:33:29,455 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 06:33:29,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-19 06:33:29,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:33:29,527 INFO L255 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-19 06:33:29,529 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 06:33:29,616 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 06:33:29,616 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 06:33:29,714 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-19 06:33:29,735 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 06:33:29,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449705840] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 06:33:29,735 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 06:33:29,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 17 [2024-11-19 06:33:29,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463204753] [2024-11-19 06:33:29,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 06:33:29,736 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-19 06:33:29,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:33:29,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-19 06:33:29,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2024-11-19 06:33:29,737 INFO L87 Difference]: Start difference. First operand 103 states and 120 transitions. Second operand has 18 states, 17 states have (on average 4.470588235294118) internal successors, (76), 18 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:33:29,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:33:29,869 INFO L93 Difference]: Finished difference Result 137 states and 157 transitions. [2024-11-19 06:33:29,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-19 06:33:29,870 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 4.470588235294118) internal successors, (76), 18 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 34 [2024-11-19 06:33:29,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:33:29,870 INFO L225 Difference]: With dead ends: 137 [2024-11-19 06:33:29,870 INFO L226 Difference]: Without dead ends: 134 [2024-11-19 06:33:29,871 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2024-11-19 06:33:29,871 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 37 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 06:33:29,871 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 279 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 06:33:29,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2024-11-19 06:33:29,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 108. [2024-11-19 06:33:29,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 105 states have (on average 1.1428571428571428) internal successors, (120), 107 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:33:29,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 120 transitions. [2024-11-19 06:33:29,874 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 120 transitions. Word has length 34 [2024-11-19 06:33:29,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:33:29,874 INFO L471 AbstractCegarLoop]: Abstraction has 108 states and 120 transitions. [2024-11-19 06:33:29,874 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 4.470588235294118) internal successors, (76), 18 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:33:29,874 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 120 transitions. [2024-11-19 06:33:29,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-19 06:33:29,874 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:33:29,875 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 06:33:29,888 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-19 06:33:30,078 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-19 06:33:30,079 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)] === [2024-11-19 06:33:30,079 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:33:30,079 INFO L85 PathProgramCache]: Analyzing trace with hash -758277541, now seen corresponding path program 2 times [2024-11-19 06:33:30,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:33:30,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869824727] [2024-11-19 06:33:30,080 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 06:33:30,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:33:30,104 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 06:33:30,104 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 06:33:30,604 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 06:33:30,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:33:30,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869824727] [2024-11-19 06:33:30,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869824727] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 06:33:30,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682045357] [2024-11-19 06:33:30,605 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 06:33:30,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 06:33:30,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 06:33:30,610 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 06:33:30,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-19 06:33:30,700 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 06:33:30,700 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 06:33:30,702 INFO L255 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-19 06:33:30,704 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 06:33:30,764 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-19 06:33:30,849 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 06:33:30,849 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 06:33:30,872 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-19 06:33:30,874 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-19 06:33:30,921 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 06:33:30,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682045357] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 06:33:30,922 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 06:33:30,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 11] total 27 [2024-11-19 06:33:30,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259676897] [2024-11-19 06:33:30,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 06:33:30,922 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-19 06:33:30,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:33:30,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-19 06:33:30,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2024-11-19 06:33:30,923 INFO L87 Difference]: Start difference. First operand 108 states and 120 transitions. Second operand has 27 states, 27 states have (on average 3.2222222222222223) internal successors, (87), 27 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:33:31,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:33:31,266 INFO L93 Difference]: Finished difference Result 169 states and 181 transitions. [2024-11-19 06:33:31,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-19 06:33:31,266 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.2222222222222223) internal successors, (87), 27 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) Word has length 44 [2024-11-19 06:33:31,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:33:31,267 INFO L225 Difference]: With dead ends: 169 [2024-11-19 06:33:31,267 INFO L226 Difference]: Without dead ends: 122 [2024-11-19 06:33:31,268 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=169, Invalid=1237, Unknown=0, NotChecked=0, Total=1406 [2024-11-19 06:33:31,268 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 30 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-19 06:33:31,268 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 290 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 411 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-19 06:33:31,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2024-11-19 06:33:31,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 116. [2024-11-19 06:33:31,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 113 states have (on average 1.1327433628318584) internal successors, (128), 115 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:33:31,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 128 transitions. [2024-11-19 06:33:31,270 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 128 transitions. Word has length 44 [2024-11-19 06:33:31,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:33:31,270 INFO L471 AbstractCegarLoop]: Abstraction has 116 states and 128 transitions. [2024-11-19 06:33:31,270 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.2222222222222223) internal successors, (87), 27 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:33:31,270 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 128 transitions. [2024-11-19 06:33:31,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-19 06:33:31,271 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:33:31,271 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 06:33:31,284 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-19 06:33:31,471 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-19 06:33:31,471 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 06:33:31,472 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:33:31,472 INFO L85 PathProgramCache]: Analyzing trace with hash 197624504, now seen corresponding path program 3 times [2024-11-19 06:33:31,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:33:31,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648205194] [2024-11-19 06:33:31,472 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 06:33:31,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:33:31,488 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-19 06:33:31,488 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 06:33:31,701 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 06:33:31,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:33:31,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648205194] [2024-11-19 06:33:31,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648205194] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 06:33:31,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118036427] [2024-11-19 06:33:31,703 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 06:33:31,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 06:33:31,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 06:33:31,704 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 06:33:31,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-19 06:33:31,796 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-19 06:33:31,796 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 06:33:31,797 INFO L255 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-19 06:33:31,799 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 06:33:31,804 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-19 06:33:31,891 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 06:33:31,892 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 06:33:32,082 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 06:33:32,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118036427] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 06:33:32,082 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 06:33:32,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 23 [2024-11-19 06:33:32,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314467395] [2024-11-19 06:33:32,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 06:33:32,083 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-19 06:33:32,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:33:32,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-19 06:33:32,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2024-11-19 06:33:32,084 INFO L87 Difference]: Start difference. First operand 116 states and 128 transitions. Second operand has 24 states, 23 states have (on average 5.043478260869565) internal successors, (116), 24 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:33:32,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:33:32,218 INFO L93 Difference]: Finished difference Result 175 states and 195 transitions. [2024-11-19 06:33:32,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-19 06:33:32,218 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 5.043478260869565) internal successors, (116), 24 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have 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 [2024-11-19 06:33:32,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:33:32,219 INFO L225 Difference]: With dead ends: 175 [2024-11-19 06:33:32,219 INFO L226 Difference]: Without dead ends: 169 [2024-11-19 06:33:32,219 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2024-11-19 06:33:32,220 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 52 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 06:33:32,220 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 281 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 06:33:32,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2024-11-19 06:33:32,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 148. [2024-11-19 06:33:32,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 145 states have (on average 1.1241379310344828) internal successors, (163), 147 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) [2024-11-19 06:33:32,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 163 transitions. [2024-11-19 06:33:32,222 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 163 transitions. Word has length 48 [2024-11-19 06:33:32,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:33:32,222 INFO L471 AbstractCegarLoop]: Abstraction has 148 states and 163 transitions. [2024-11-19 06:33:32,222 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 5.043478260869565) internal successors, (116), 24 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:33:32,222 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 163 transitions. [2024-11-19 06:33:32,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-19 06:33:32,223 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:33:32,223 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 06:33:32,236 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-19 06:33:32,427 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 06:33:32,428 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 06:33:32,428 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:33:32,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1690305038, now seen corresponding path program 1 times [2024-11-19 06:33:32,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:33:32,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436545085] [2024-11-19 06:33:32,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:33:32,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:33:32,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:33:32,600 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-19 06:33:32,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:33:32,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436545085] [2024-11-19 06:33:32,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436545085] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 06:33:32,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583223028] [2024-11-19 06:33:32,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 06:33:32,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 06:33:32,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 06:33:32,604 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 06:33:32,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-19 06:33:32,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:33:32,692 INFO L255 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-19 06:33:32,696 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 06:33:32,876 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-19 06:33:32,876 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 06:33:33,028 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-19 06:33:33,067 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-19 06:33:33,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583223028] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 06:33:33,067 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 06:33:33,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2024-11-19 06:33:33,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343506010] [2024-11-19 06:33:33,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 06:33:33,068 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-19 06:33:33,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:33:33,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-19 06:33:33,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2024-11-19 06:33:33,099 INFO L87 Difference]: Start difference. First operand 148 states and 163 transitions. Second operand has 20 states, 19 states have (on average 5.157894736842105) internal successors, (98), 20 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:33:33,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:33:33,325 INFO L93 Difference]: Finished difference Result 185 states and 199 transitions. [2024-11-19 06:33:33,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-19 06:33:33,325 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 5.157894736842105) internal successors, (98), 20 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2024-11-19 06:33:33,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:33:33,326 INFO L225 Difference]: With dead ends: 185 [2024-11-19 06:33:33,326 INFO L226 Difference]: Without dead ends: 185 [2024-11-19 06:33:33,326 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 83 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2024-11-19 06:33:33,328 INFO L432 NwaCegarLoop]: 58 mSDtfsCounter, 55 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-19 06:33:33,329 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 468 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-19 06:33:33,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2024-11-19 06:33:33,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 161. [2024-11-19 06:33:33,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 158 states have (on average 1.1265822784810127) internal successors, (178), 160 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:33:33,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 178 transitions. [2024-11-19 06:33:33,338 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 178 transitions. Word has length 49 [2024-11-19 06:33:33,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:33:33,339 INFO L471 AbstractCegarLoop]: Abstraction has 161 states and 178 transitions. [2024-11-19 06:33:33,339 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 5.157894736842105) internal successors, (98), 20 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:33:33,342 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 178 transitions. [2024-11-19 06:33:33,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-11-19 06:33:33,342 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:33:33,343 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 06:33:33,362 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-19 06:33:33,543 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 06:33:33,544 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 06:33:33,544 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:33:33,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1205248681, now seen corresponding path program 4 times [2024-11-19 06:33:33,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:33:33,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638988712] [2024-11-19 06:33:33,544 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 06:33:33,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:33:33,581 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 06:33:33,585 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 06:33:34,494 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 42 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 06:33:34,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:33:34,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638988712] [2024-11-19 06:33:34,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638988712] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 06:33:34,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375382194] [2024-11-19 06:33:34,499 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 06:33:34,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 06:33:34,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 06:33:34,501 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 06:33:34,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-19 06:33:34,584 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 06:33:34,585 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 06:33:34,586 INFO L255 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-19 06:33:34,588 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 06:33:34,747 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-11-19 06:33:35,151 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 38 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 06:33:35,151 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 06:33:35,217 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 38 [2024-11-19 06:33:35,221 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 06:33:35,221 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 34 [2024-11-19 06:33:35,364 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 42 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 06:33:35,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375382194] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 06:33:35,365 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 06:33:35,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 33 [2024-11-19 06:33:35,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036915769] [2024-11-19 06:33:35,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 06:33:35,365 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-19 06:33:35,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:33:35,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-19 06:33:35,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=902, Unknown=0, NotChecked=0, Total=1056 [2024-11-19 06:33:35,366 INFO L87 Difference]: Start difference. First operand 161 states and 178 transitions. Second operand has 33 states, 33 states have (on average 3.0) internal successors, (99), 33 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:33:35,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:33:35,592 INFO L93 Difference]: Finished difference Result 259 states and 277 transitions. [2024-11-19 06:33:35,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-19 06:33:35,593 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.0) internal successors, (99), 33 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2024-11-19 06:33:35,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:33:35,594 INFO L225 Difference]: With dead ends: 259 [2024-11-19 06:33:35,594 INFO L226 Difference]: Without dead ends: 175 [2024-11-19 06:33:35,595 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 101 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=199, Invalid=1133, Unknown=0, NotChecked=0, Total=1332 [2024-11-19 06:33:35,596 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 20 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-19 06:33:35,596 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 456 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-19 06:33:35,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2024-11-19 06:33:35,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 169. [2024-11-19 06:33:35,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 166 states have (on average 1.1204819277108433) internal successors, (186), 168 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:33:35,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 186 transitions. [2024-11-19 06:33:35,599 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 186 transitions. Word has length 58 [2024-11-19 06:33:35,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:33:35,599 INFO L471 AbstractCegarLoop]: Abstraction has 169 states and 186 transitions. [2024-11-19 06:33:35,599 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.0) internal successors, (99), 33 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:33:35,599 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 186 transitions. [2024-11-19 06:33:35,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-11-19 06:33:35,600 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:33:35,600 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 06:33:35,613 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-19 06:33:35,800 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 06:33:35,801 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 06:33:35,801 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:33:35,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1443898438, now seen corresponding path program 5 times [2024-11-19 06:33:35,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:33:35,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106323983] [2024-11-19 06:33:35,801 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 06:33:35,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:33:35,820 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-19 06:33:35,820 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 06:33:36,049 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 6 proven. 51 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 06:33:36,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:33:36,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106323983] [2024-11-19 06:33:36,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106323983] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 06:33:36,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445827782] [2024-11-19 06:33:36,050 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 06:33:36,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 06:33:36,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 06:33:36,052 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 06:33:36,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-19 06:33:36,159 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-19 06:33:36,159 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 06:33:36,161 INFO L255 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-19 06:33:36,163 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 06:33:36,169 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-19 06:33:36,347 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 6 proven. 51 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 06:33:36,348 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 06:33:36,780 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 6 proven. 51 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 06:33:36,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445827782] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 06:33:36,784 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 06:33:36,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2024-11-19 06:33:36,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165313247] [2024-11-19 06:33:36,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 06:33:36,785 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-19 06:33:36,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:33:36,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-19 06:33:36,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=668, Unknown=0, NotChecked=0, Total=812 [2024-11-19 06:33:36,786 INFO L87 Difference]: Start difference. First operand 169 states and 186 transitions. Second operand has 29 states, 28 states have (on average 5.5) internal successors, (154), 29 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:33:37,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:33:37,108 INFO L93 Difference]: Finished difference Result 244 states and 272 transitions. [2024-11-19 06:33:37,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-19 06:33:37,109 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 5.5) internal successors, (154), 29 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2024-11-19 06:33:37,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:33:37,110 INFO L225 Difference]: With dead ends: 244 [2024-11-19 06:33:37,110 INFO L226 Difference]: Without dead ends: 238 [2024-11-19 06:33:37,110 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=709, Unknown=0, NotChecked=0, Total=870 [2024-11-19 06:33:37,110 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 38 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-19 06:33:37,110 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 443 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 420 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-19 06:33:37,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2024-11-19 06:33:37,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 211. [2024-11-19 06:33:37,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 208 states have (on average 1.1153846153846154) internal successors, (232), 210 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:33:37,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 232 transitions. [2024-11-19 06:33:37,123 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 232 transitions. Word has length 62 [2024-11-19 06:33:37,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:33:37,123 INFO L471 AbstractCegarLoop]: Abstraction has 211 states and 232 transitions. [2024-11-19 06:33:37,123 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 5.5) internal successors, (154), 29 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:33:37,123 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 232 transitions. [2024-11-19 06:33:37,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-11-19 06:33:37,123 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:33:37,124 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 06:33:37,151 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-19 06:33:37,324 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,SelfDestructingSolverStorable31 [2024-11-19 06:33:37,326 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 06:33:37,326 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:33:37,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1410431106, now seen corresponding path program 2 times [2024-11-19 06:33:37,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:33:37,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744888311] [2024-11-19 06:33:37,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 06:33:37,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:33:37,365 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 06:33:37,369 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 06:33:37,785 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 17 proven. 22 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-19 06:33:37,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:33:37,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744888311] [2024-11-19 06:33:37,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744888311] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 06:33:37,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775435935] [2024-11-19 06:33:37,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 06:33:37,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 06:33:37,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 06:33:37,787 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 06:33:37,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-19 06:33:37,879 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 06:33:37,880 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 06:33:37,881 INFO L255 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-19 06:33:37,882 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 06:33:38,038 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-19 06:33:38,122 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 17 proven. 22 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-19 06:33:38,122 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 06:33:38,168 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-19 06:33:38,169 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-19 06:33:38,268 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 17 proven. 22 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-19 06:33:38,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775435935] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 06:33:38,268 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 06:33:38,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 22 [2024-11-19 06:33:38,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039089624] [2024-11-19 06:33:38,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 06:33:38,270 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-19 06:33:38,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:33:38,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-19 06:33:38,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2024-11-19 06:33:38,271 INFO L87 Difference]: Start difference. First operand 211 states and 232 transitions. Second operand has 22 states, 22 states have (on average 4.045454545454546) internal successors, (89), 22 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:33:38,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:33:38,620 INFO L93 Difference]: Finished difference Result 338 states and 365 transitions. [2024-11-19 06:33:38,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-19 06:33:38,621 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.045454545454546) internal successors, (89), 22 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 63 [2024-11-19 06:33:38,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:33:38,622 INFO L225 Difference]: With dead ends: 338 [2024-11-19 06:33:38,622 INFO L226 Difference]: Without dead ends: 330 [2024-11-19 06:33:38,622 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2024-11-19 06:33:38,623 INFO L432 NwaCegarLoop]: 63 mSDtfsCounter, 26 mSDsluCounter, 903 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 966 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-19 06:33:38,624 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 966 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-19 06:33:38,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2024-11-19 06:33:38,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 277. [2024-11-19 06:33:38,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 274 states have (on average 1.1167883211678833) internal successors, (306), 276 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:33:38,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 306 transitions. [2024-11-19 06:33:38,633 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 306 transitions. Word has length 63 [2024-11-19 06:33:38,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:33:38,633 INFO L471 AbstractCegarLoop]: Abstraction has 277 states and 306 transitions. [2024-11-19 06:33:38,633 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.045454545454546) internal successors, (89), 22 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:33:38,633 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 306 transitions. [2024-11-19 06:33:38,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-11-19 06:33:38,634 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:33:38,634 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 06:33:38,650 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-19 06:33:38,834 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,SelfDestructingSolverStorable32 [2024-11-19 06:33:38,835 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)] === [2024-11-19 06:33:38,835 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:33:38,835 INFO L85 PathProgramCache]: Analyzing trace with hash 939650241, now seen corresponding path program 3 times [2024-11-19 06:33:38,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:33:38,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433651538] [2024-11-19 06:33:38,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 06:33:38,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:33:38,854 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-19 06:33:38,857 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 06:33:39,171 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 1 proven. 47 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-19 06:33:39,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:33:39,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433651538] [2024-11-19 06:33:39,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433651538] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 06:33:39,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490539812] [2024-11-19 06:33:39,172 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 06:33:39,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 06:33:39,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 06:33:39,174 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 06:33:39,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-19 06:33:39,283 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-19 06:33:39,283 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 06:33:39,289 INFO L255 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-19 06:33:39,291 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 06:33:39,410 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 6 proven. 42 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-19 06:33:39,410 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 06:33:39,574 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2024-11-19 06:33:39,629 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 6 proven. 42 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-19 06:33:39,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490539812] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 06:33:39,630 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 06:33:39,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2024-11-19 06:33:39,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751715176] [2024-11-19 06:33:39,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 06:33:39,630 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-19 06:33:39,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:33:39,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-19 06:33:39,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2024-11-19 06:33:39,631 INFO L87 Difference]: Start difference. First operand 277 states and 306 transitions. Second operand has 24 states, 23 states have (on average 5.478260869565218) internal successors, (126), 24 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:33:39,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:33:39,876 INFO L93 Difference]: Finished difference Result 326 states and 352 transitions. [2024-11-19 06:33:39,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-19 06:33:39,876 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 5.478260869565218) internal successors, (126), 24 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2024-11-19 06:33:39,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:33:39,877 INFO L225 Difference]: With dead ends: 326 [2024-11-19 06:33:39,877 INFO L226 Difference]: Without dead ends: 326 [2024-11-19 06:33:39,878 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 117 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2024-11-19 06:33:39,878 INFO L432 NwaCegarLoop]: 54 mSDtfsCounter, 123 mSDsluCounter, 475 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-19 06:33:39,878 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 529 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-19 06:33:39,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2024-11-19 06:33:39,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 290. [2024-11-19 06:33:39,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 287 states have (on average 1.1184668989547037) internal successors, (321), 289 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:33:39,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 321 transitions. [2024-11-19 06:33:39,886 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 321 transitions. Word has length 67 [2024-11-19 06:33:39,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:33:39,889 INFO L471 AbstractCegarLoop]: Abstraction has 290 states and 321 transitions. [2024-11-19 06:33:39,889 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 5.478260869565218) internal successors, (126), 24 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:33:39,889 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 321 transitions. [2024-11-19 06:33:39,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-11-19 06:33:39,890 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:33:39,890 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 06:33:39,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-19 06:33:40,090 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 [2024-11-19 06:33:40,091 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)] === [2024-11-19 06:33:40,091 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:33:40,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1016780105, now seen corresponding path program 6 times [2024-11-19 06:33:40,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:33:40,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974809463] [2024-11-19 06:33:40,091 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-19 06:33:40,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:33:40,120 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-11-19 06:33:40,121 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 06:33:40,431 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 28 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 06:33:40,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:33:40,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974809463] [2024-11-19 06:33:40,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974809463] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 06:33:40,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75635674] [2024-11-19 06:33:40,432 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-19 06:33:40,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 06:33:40,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 06:33:40,433 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 06:33:40,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-19 06:33:40,548 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-11-19 06:33:40,548 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 06:33:40,550 INFO L255 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-11-19 06:33:40,552 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 06:33:40,638 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-19 06:33:40,710 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 28 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 06:33:40,710 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 06:33:40,758 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-19 06:33:40,760 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-19 06:33:40,817 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 28 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 06:33:40,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75635674] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 06:33:40,817 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 06:33:40,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 26 [2024-11-19 06:33:40,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962455134] [2024-11-19 06:33:40,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 06:33:40,818 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-19 06:33:40,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:33:40,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-19 06:33:40,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2024-11-19 06:33:40,819 INFO L87 Difference]: Start difference. First operand 290 states and 321 transitions. Second operand has 26 states, 26 states have (on average 4.269230769230769) internal successors, (111), 26 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:33:41,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:33:41,100 INFO L93 Difference]: Finished difference Result 482 states and 519 transitions. [2024-11-19 06:33:41,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-19 06:33:41,100 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.269230769230769) internal successors, (111), 26 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 72 [2024-11-19 06:33:41,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:33:41,101 INFO L225 Difference]: With dead ends: 482 [2024-11-19 06:33:41,101 INFO L226 Difference]: Without dead ends: 311 [2024-11-19 06:33:41,101 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=119, Invalid=873, Unknown=0, NotChecked=0, Total=992 [2024-11-19 06:33:41,102 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 30 mSDsluCounter, 781 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 828 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-19 06:33:41,102 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 828 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-19 06:33:41,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2024-11-19 06:33:41,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 302. [2024-11-19 06:33:41,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 299 states have (on average 1.1137123745819397) internal successors, (333), 301 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:33:41,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 333 transitions. [2024-11-19 06:33:41,105 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 333 transitions. Word has length 72 [2024-11-19 06:33:41,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:33:41,105 INFO L471 AbstractCegarLoop]: Abstraction has 302 states and 333 transitions. [2024-11-19 06:33:41,106 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.269230769230769) internal successors, (111), 26 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:33:41,106 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 333 transitions. [2024-11-19 06:33:41,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2024-11-19 06:33:41,106 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:33:41,107 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 06:33:41,121 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-19 06:33:41,310 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 [2024-11-19 06:33:41,311 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 06:33:41,311 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:33:41,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1510402668, now seen corresponding path program 7 times [2024-11-19 06:33:41,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:33:41,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056214464] [2024-11-19 06:33:41,312 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-19 06:33:41,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:33:41,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:33:41,659 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 6 proven. 98 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 06:33:41,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:33:41,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056214464] [2024-11-19 06:33:41,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056214464] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 06:33:41,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775402919] [2024-11-19 06:33:41,663 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-19 06:33:41,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 06:33:41,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 06:33:41,665 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 06:33:41,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-19 06:33:41,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:33:41,771 INFO L255 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-19 06:33:41,772 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 06:33:41,971 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 15 proven. 89 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 06:33:41,971 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 06:33:42,209 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-19 06:33:42,277 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 15 proven. 89 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 06:33:42,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775402919] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 06:33:42,277 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 06:33:42,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 28 [2024-11-19 06:33:42,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867554396] [2024-11-19 06:33:42,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 06:33:42,278 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-19 06:33:42,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:33:42,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-19 06:33:42,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2024-11-19 06:33:42,278 INFO L87 Difference]: Start difference. First operand 302 states and 333 transitions. Second operand has 29 states, 28 states have (on average 5.714285714285714) internal successors, (160), 29 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:33:42,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:33:42,556 INFO L93 Difference]: Finished difference Result 409 states and 457 transitions. [2024-11-19 06:33:42,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-19 06:33:42,557 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 5.714285714285714) internal successors, (160), 29 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2024-11-19 06:33:42,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:33:42,558 INFO L225 Difference]: With dead ends: 409 [2024-11-19 06:33:42,558 INFO L226 Difference]: Without dead ends: 403 [2024-11-19 06:33:42,558 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 131 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=124, Invalid=746, Unknown=0, NotChecked=0, Total=870 [2024-11-19 06:33:42,558 INFO L432 NwaCegarLoop]: 51 mSDtfsCounter, 37 mSDsluCounter, 523 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 574 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-19 06:33:42,559 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 574 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 581 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-19 06:33:42,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2024-11-19 06:33:42,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 364. [2024-11-19 06:33:42,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 361 states have (on average 1.110803324099723) internal successors, (401), 363 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:33:42,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 401 transitions. [2024-11-19 06:33:42,563 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 401 transitions. Word has length 76 [2024-11-19 06:33:42,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:33:42,563 INFO L471 AbstractCegarLoop]: Abstraction has 364 states and 401 transitions. [2024-11-19 06:33:42,563 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 5.714285714285714) internal successors, (160), 29 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:33:42,563 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 401 transitions. [2024-11-19 06:33:42,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-11-19 06:33:42,563 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:33:42,563 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 06:33:42,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-19 06:33:42,767 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 [2024-11-19 06:33:42,767 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)] === [2024-11-19 06:33:42,768 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:33:42,768 INFO L85 PathProgramCache]: Analyzing trace with hash -120638543, now seen corresponding path program 4 times [2024-11-19 06:33:42,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:33:42,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077538535] [2024-11-19 06:33:42,768 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 06:33:42,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:33:42,796 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 06:33:42,796 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 06:33:43,719 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2024-11-19 06:33:43,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:33:43,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077538535] [2024-11-19 06:33:43,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077538535] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 06:33:43,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118889967] [2024-11-19 06:33:43,719 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 06:33:43,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 06:33:43,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 06:33:43,721 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 06:33:43,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-19 06:33:43,826 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 06:33:43,827 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 06:33:43,828 INFO L255 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 79 conjuncts are in the unsatisfiable core [2024-11-19 06:33:43,831 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 06:33:43,928 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-11-19 06:33:47,524 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 06:33:47,525 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 132 treesize of output 171 [2024-11-19 06:33:47,820 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 06:33:47,820 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 88 [2024-11-19 06:33:47,893 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 51 proven. 13 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2024-11-19 06:33:47,893 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 06:33:49,865 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 06:33:49,866 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 55 treesize of output 105 [2024-11-19 06:33:50,355 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2024-11-19 06:33:50,366 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 77 [2024-11-19 06:33:50,382 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-19 06:33:50,463 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2024-11-19 06:33:50,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118889967] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 06:33:50,467 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 06:33:50,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 28, 32] total 75 [2024-11-19 06:33:50,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406948690] [2024-11-19 06:33:50,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 06:33:50,468 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2024-11-19 06:33:50,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:33:50,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2024-11-19 06:33:50,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=914, Invalid=4786, Unknown=0, NotChecked=0, Total=5700 [2024-11-19 06:33:50,471 INFO L87 Difference]: Start difference. First operand 364 states and 401 transitions. Second operand has 76 states, 75 states have (on average 1.96) internal successors, (147), 76 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:33:53,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:33:53,842 INFO L93 Difference]: Finished difference Result 492 states and 524 transitions. [2024-11-19 06:33:53,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-11-19 06:33:53,842 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 75 states have (on average 1.96) internal successors, (147), 76 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2024-11-19 06:33:53,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:33:53,843 INFO L225 Difference]: With dead ends: 492 [2024-11-19 06:33:53,843 INFO L226 Difference]: Without dead ends: 492 [2024-11-19 06:33:53,845 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 102 SyntacticMatches, 5 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2637 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=1956, Invalid=7550, Unknown=0, NotChecked=0, Total=9506 [2024-11-19 06:33:53,845 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 120 mSDsluCounter, 672 mSDsCounter, 0 mSdLazyCounter, 1652 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 705 SdHoareTripleChecker+Invalid, 1659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-11-19 06:33:53,846 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 705 Invalid, 1659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1652 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-11-19 06:33:53,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2024-11-19 06:33:53,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 262. [2024-11-19 06:33:53,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 260 states have (on average 1.0846153846153845) internal successors, (282), 261 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:33:53,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 282 transitions. [2024-11-19 06:33:53,863 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 282 transitions. Word has length 81 [2024-11-19 06:33:53,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:33:53,863 INFO L471 AbstractCegarLoop]: Abstraction has 262 states and 282 transitions. [2024-11-19 06:33:53,863 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 75 states have (on average 1.96) internal successors, (147), 76 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:33:53,864 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 282 transitions. [2024-11-19 06:33:53,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2024-11-19 06:33:53,864 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:33:53,864 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 06:33:53,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-19 06:33:54,064 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 [2024-11-19 06:33:54,065 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 06:33:54,065 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:33:54,065 INFO L85 PathProgramCache]: Analyzing trace with hash -79474043, now seen corresponding path program 8 times [2024-11-19 06:33:54,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:33:54,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167398281] [2024-11-19 06:33:54,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 06:33:54,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:33:54,092 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 06:33:54,093 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 06:33:54,761 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 36 proven. 112 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 06:33:54,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:33:54,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167398281] [2024-11-19 06:33:54,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167398281] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 06:33:54,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94059262] [2024-11-19 06:33:54,765 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 06:33:54,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 06:33:54,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 06:33:54,768 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 06:33:54,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-19 06:33:54,885 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 06:33:54,885 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 06:33:54,892 INFO L255 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-11-19 06:33:54,899 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 06:33:55,054 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-19 06:33:55,150 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 36 proven. 112 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 06:33:55,152 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 06:33:55,204 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-19 06:33:55,206 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-19 06:33:55,262 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 36 proven. 112 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 06:33:55,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94059262] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 06:33:55,262 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 06:33:55,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 29 [2024-11-19 06:33:55,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999879633] [2024-11-19 06:33:55,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 06:33:55,263 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-19 06:33:55,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:33:55,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-19 06:33:55,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=726, Unknown=0, NotChecked=0, Total=812 [2024-11-19 06:33:55,263 INFO L87 Difference]: Start difference. First operand 262 states and 282 transitions. Second operand has 29 states, 29 states have (on average 4.448275862068965) internal successors, (129), 29 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) [2024-11-19 06:33:55,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:33:55,612 INFO L93 Difference]: Finished difference Result 433 states and 461 transitions. [2024-11-19 06:33:55,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-19 06:33:55,612 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.448275862068965) internal successors, (129), 29 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 86 [2024-11-19 06:33:55,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:33:55,613 INFO L225 Difference]: With dead ends: 433 [2024-11-19 06:33:55,613 INFO L226 Difference]: Without dead ends: 283 [2024-11-19 06:33:55,613 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=134, Invalid=1126, Unknown=0, NotChecked=0, Total=1260 [2024-11-19 06:33:55,614 INFO L432 NwaCegarLoop]: 55 mSDtfsCounter, 36 mSDsluCounter, 894 mSDsCounter, 0 mSdLazyCounter, 659 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 949 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-19 06:33:55,614 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 949 Invalid, 664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 659 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-19 06:33:55,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2024-11-19 06:33:55,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 274. [2024-11-19 06:33:55,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 272 states have (on average 1.0808823529411764) internal successors, (294), 273 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:33:55,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 294 transitions. [2024-11-19 06:33:55,620 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 294 transitions. Word has length 86 [2024-11-19 06:33:55,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:33:55,620 INFO L471 AbstractCegarLoop]: Abstraction has 274 states and 294 transitions. [2024-11-19 06:33:55,620 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.448275862068965) internal successors, (129), 29 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) [2024-11-19 06:33:55,620 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 294 transitions. [2024-11-19 06:33:55,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2024-11-19 06:33:55,621 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:33:55,621 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 06:33:55,638 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-19 06:33:55,821 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 [2024-11-19 06:33:55,822 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 06:33:55,822 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:33:55,822 INFO L85 PathProgramCache]: Analyzing trace with hash -2111801694, now seen corresponding path program 9 times [2024-11-19 06:33:55,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:33:55,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973600524] [2024-11-19 06:33:55,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 06:33:55,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:33:55,881 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-19 06:33:55,881 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 06:33:56,412 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 15 proven. 150 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 06:33:56,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:33:56,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973600524] [2024-11-19 06:33:56,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973600524] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 06:33:56,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561267183] [2024-11-19 06:33:56,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 06:33:56,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 06:33:56,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 06:33:56,414 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 06:33:56,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-19 06:33:56,588 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-19 06:33:56,588 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 06:33:56,590 INFO L255 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-19 06:33:56,592 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 06:33:56,739 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 28 proven. 137 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 06:33:56,740 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 06:33:56,984 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2024-11-19 06:33:57,032 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 28 proven. 137 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 06:33:57,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561267183] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 06:33:57,033 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 06:33:57,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 24 [2024-11-19 06:33:57,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391989598] [2024-11-19 06:33:57,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 06:33:57,033 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-19 06:33:57,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:33:57,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-19 06:33:57,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2024-11-19 06:33:57,034 INFO L87 Difference]: Start difference. First operand 274 states and 294 transitions. Second operand has 25 states, 24 states have (on average 6.291666666666667) internal successors, (151), 25 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:33:57,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:33:57,191 INFO L93 Difference]: Finished difference Result 339 states and 366 transitions. [2024-11-19 06:33:57,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-19 06:33:57,194 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 6.291666666666667) internal successors, (151), 25 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2024-11-19 06:33:57,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:33:57,195 INFO L225 Difference]: With dead ends: 339 [2024-11-19 06:33:57,195 INFO L226 Difference]: Without dead ends: 333 [2024-11-19 06:33:57,195 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 165 SyntacticMatches, 6 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=174, Invalid=756, Unknown=0, NotChecked=0, Total=930 [2024-11-19 06:33:57,196 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 105 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 06:33:57,196 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 226 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 06:33:57,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2024-11-19 06:33:57,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 304. [2024-11-19 06:33:57,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 302 states have (on average 1.0794701986754967) internal successors, (326), 303 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:33:57,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 326 transitions. [2024-11-19 06:33:57,200 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 326 transitions. Word has length 90 [2024-11-19 06:33:57,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:33:57,200 INFO L471 AbstractCegarLoop]: Abstraction has 304 states and 326 transitions. [2024-11-19 06:33:57,200 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 6.291666666666667) internal successors, (151), 25 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:33:57,200 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 326 transitions. [2024-11-19 06:33:57,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2024-11-19 06:33:57,201 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:33:57,201 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 06:33:57,219 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-19 06:33:57,401 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 [2024-11-19 06:33:57,402 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)] === [2024-11-19 06:33:57,402 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:33:57,402 INFO L85 PathProgramCache]: Analyzing trace with hash -555271661, now seen corresponding path program 10 times [2024-11-19 06:33:57,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:33:57,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935388483] [2024-11-19 06:33:57,402 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 06:33:57,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:33:57,423 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 06:33:57,423 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 06:33:58,899 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 174 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 06:33:58,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:33:58,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935388483] [2024-11-19 06:33:58,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935388483] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 06:33:58,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899023067] [2024-11-19 06:33:58,900 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 06:33:58,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 06:33:58,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 06:33:58,902 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 06:33:58,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-19 06:33:59,014 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 06:33:59,015 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 06:33:59,016 INFO L255 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 68 conjuncts are in the unsatisfiable core [2024-11-19 06:33:59,019 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 06:33:59,202 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-11-19 06:34:00,875 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 164 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 06:34:00,875 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 06:34:01,126 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 77 [2024-11-19 06:34:01,132 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 06:34:01,132 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 89 treesize of output 67 [2024-11-19 06:34:01,666 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 174 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 06:34:01,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899023067] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 06:34:01,666 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 06:34:01,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 66 [2024-11-19 06:34:01,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450082261] [2024-11-19 06:34:01,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 06:34:01,667 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2024-11-19 06:34:01,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:34:01,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2024-11-19 06:34:01,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=552, Invalid=3738, Unknown=0, NotChecked=0, Total=4290 [2024-11-19 06:34:01,668 INFO L87 Difference]: Start difference. First operand 304 states and 326 transitions. Second operand has 66 states, 66 states have (on average 2.9545454545454546) internal successors, (195), 66 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:34:02,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:34:02,184 INFO L93 Difference]: Finished difference Result 505 states and 537 transitions. [2024-11-19 06:34:02,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-11-19 06:34:02,184 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.9545454545454546) internal successors, (195), 66 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2024-11-19 06:34:02,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:34:02,185 INFO L225 Difference]: With dead ends: 505 [2024-11-19 06:34:02,185 INFO L226 Difference]: Without dead ends: 325 [2024-11-19 06:34:02,186 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 167 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1866 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=653, Invalid=4459, Unknown=0, NotChecked=0, Total=5112 [2024-11-19 06:34:02,187 INFO L432 NwaCegarLoop]: 53 mSDtfsCounter, 35 mSDsluCounter, 724 mSDsCounter, 0 mSdLazyCounter, 799 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 777 SdHoareTripleChecker+Invalid, 802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-19 06:34:02,187 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 777 Invalid, 802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 799 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-19 06:34:02,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2024-11-19 06:34:02,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 316. [2024-11-19 06:34:02,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 314 states have (on average 1.0764331210191083) internal successors, (338), 315 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:34:02,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 338 transitions. [2024-11-19 06:34:02,191 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 338 transitions. Word has length 100 [2024-11-19 06:34:02,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:34:02,192 INFO L471 AbstractCegarLoop]: Abstraction has 316 states and 338 transitions. [2024-11-19 06:34:02,192 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.9545454545454546) internal successors, (195), 66 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:34:02,192 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 338 transitions. [2024-11-19 06:34:02,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-11-19 06:34:02,192 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:34:02,193 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 06:34:02,208 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-19 06:34:02,397 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 [2024-11-19 06:34:02,397 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 06:34:02,397 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:34:02,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1479514256, now seen corresponding path program 11 times [2024-11-19 06:34:02,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:34:02,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644305644] [2024-11-19 06:34:02,398 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 06:34:02,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:34:02,414 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-11-19 06:34:02,414 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 06:34:02,757 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 45 proven. 195 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 06:34:02,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:34:02,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644305644] [2024-11-19 06:34:02,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644305644] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 06:34:02,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665693580] [2024-11-19 06:34:02,758 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 06:34:02,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 06:34:02,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 06:34:02,763 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 06:34:02,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-19 06:34:02,935 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-11-19 06:34:02,935 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 06:34:02,937 INFO L255 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-11-19 06:34:02,942 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 06:34:02,946 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-19 06:34:03,259 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 45 proven. 195 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 06:34:03,259 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 06:34:03,796 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 45 proven. 195 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 06:34:03,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665693580] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 06:34:03,796 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 06:34:03,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 43 [2024-11-19 06:34:03,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593161151] [2024-11-19 06:34:03,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 06:34:03,797 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-11-19 06:34:03,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:34:03,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-11-19 06:34:03,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=1592, Unknown=0, NotChecked=0, Total=1892 [2024-11-19 06:34:03,798 INFO L87 Difference]: Start difference. First operand 316 states and 338 transitions. Second operand has 44 states, 43 states have (on average 5.813953488372093) internal successors, (250), 44 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:34:04,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:34:04,200 INFO L93 Difference]: Finished difference Result 381 states and 410 transitions. [2024-11-19 06:34:04,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-19 06:34:04,200 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 5.813953488372093) internal successors, (250), 44 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2024-11-19 06:34:04,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:34:04,201 INFO L225 Difference]: With dead ends: 381 [2024-11-19 06:34:04,201 INFO L226 Difference]: Without dead ends: 375 [2024-11-19 06:34:04,202 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 743 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=326, Invalid=1654, Unknown=0, NotChecked=0, Total=1980 [2024-11-19 06:34:04,202 INFO L432 NwaCegarLoop]: 65 mSDtfsCounter, 36 mSDsluCounter, 863 mSDsCounter, 0 mSdLazyCounter, 961 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 928 SdHoareTripleChecker+Invalid, 963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 961 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-19 06:34:04,202 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 928 Invalid, 963 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 961 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-19 06:34:04,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2024-11-19 06:34:04,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 346. [2024-11-19 06:34:04,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 344 states have (on average 1.0755813953488371) internal successors, (370), 345 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:34:04,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 370 transitions. [2024-11-19 06:34:04,207 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 370 transitions. Word has length 104 [2024-11-19 06:34:04,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:34:04,207 INFO L471 AbstractCegarLoop]: Abstraction has 346 states and 370 transitions. [2024-11-19 06:34:04,207 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 5.813953488372093) internal successors, (250), 44 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:34:04,207 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 370 transitions. [2024-11-19 06:34:04,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2024-11-19 06:34:04,208 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:34:04,208 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 06:34:04,222 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-11-19 06:34:04,412 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 [2024-11-19 06:34:04,413 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 06:34:04,413 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:34:04,413 INFO L85 PathProgramCache]: Analyzing trace with hash 762511713, now seen corresponding path program 12 times [2024-11-19 06:34:04,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:34:04,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203079527] [2024-11-19 06:34:04,413 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-19 06:34:04,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:34:04,437 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2024-11-19 06:34:04,437 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 06:34:04,967 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 52 proven. 252 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 06:34:04,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:34:04,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203079527] [2024-11-19 06:34:04,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203079527] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 06:34:04,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445666762] [2024-11-19 06:34:04,968 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-19 06:34:04,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 06:34:04,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 06:34:04,972 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 06:34:04,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-19 06:34:05,170 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2024-11-19 06:34:05,170 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 06:34:05,173 INFO L255 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-11-19 06:34:05,175 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 06:34:05,297 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-11-19 06:34:14,153 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 06:34:14,154 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2024-11-19 06:34:14,316 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 45 proven. 259 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 06:34:14,316 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 06:34:15,390 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2024-11-19 06:34:15,393 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 15 treesize of output 11 [2024-11-19 06:34:15,396 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2024-11-19 06:34:15,522 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 45 proven. 259 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 06:34:15,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445666762] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 06:34:15,523 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 06:34:15,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 20] total 53 [2024-11-19 06:34:15,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545892320] [2024-11-19 06:34:15,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 06:34:15,523 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2024-11-19 06:34:15,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:34:15,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2024-11-19 06:34:15,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=2514, Unknown=2, NotChecked=0, Total=2756 [2024-11-19 06:34:15,525 INFO L87 Difference]: Start difference. First operand 346 states and 370 transitions. Second operand has 53 states, 53 states have (on average 5.660377358490566) internal successors, (300), 53 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:34:34,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:34:34,629 INFO L93 Difference]: Finished difference Result 642 states and 685 transitions. [2024-11-19 06:34:34,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-11-19 06:34:34,630 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 5.660377358490566) internal successors, (300), 53 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 114 [2024-11-19 06:34:34,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:34:34,631 INFO L225 Difference]: With dead ends: 642 [2024-11-19 06:34:34,631 INFO L226 Difference]: Without dead ends: 426 [2024-11-19 06:34:34,633 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 190 SyntacticMatches, 7 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1800 ImplicationChecksByTransitivity, 27.7s TimeCoverageRelationStatistics Valid=678, Invalid=5482, Unknown=2, NotChecked=0, Total=6162 [2024-11-19 06:34:34,633 INFO L432 NwaCegarLoop]: 60 mSDtfsCounter, 481 mSDsluCounter, 1051 mSDsCounter, 0 mSdLazyCounter, 1366 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 481 SdHoareTripleChecker+Valid, 1111 SdHoareTripleChecker+Invalid, 1421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-19 06:34:34,633 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [481 Valid, 1111 Invalid, 1421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 1366 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-19 06:34:34,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2024-11-19 06:34:34,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 388. [2024-11-19 06:34:34,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 386 states have (on average 1.072538860103627) internal successors, (414), 387 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:34:34,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 414 transitions. [2024-11-19 06:34:34,638 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 414 transitions. Word has length 114 [2024-11-19 06:34:34,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:34:34,638 INFO L471 AbstractCegarLoop]: Abstraction has 388 states and 414 transitions. [2024-11-19 06:34:34,638 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 5.660377358490566) internal successors, (300), 53 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:34:34,638 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 414 transitions. [2024-11-19 06:34:34,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2024-11-19 06:34:34,639 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:34:34,639 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 06:34:34,655 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-11-19 06:34:34,843 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 [2024-11-19 06:34:34,843 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)] === [2024-11-19 06:34:34,844 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:34:34,844 INFO L85 PathProgramCache]: Analyzing trace with hash -877344657, now seen corresponding path program 13 times [2024-11-19 06:34:34,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:34:34,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429806587] [2024-11-19 06:34:34,844 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-19 06:34:34,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:34:34,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:34:35,484 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 60 proven. 343 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 06:34:35,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:34:35,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429806587] [2024-11-19 06:34:35,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429806587] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 06:34:35,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702283161] [2024-11-19 06:34:35,485 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-19 06:34:35,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 06:34:35,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 06:34:35,488 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 06:34:35,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-19 06:34:35,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 06:34:35,681 INFO L255 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 67 conjuncts are in the unsatisfiable core [2024-11-19 06:34:35,684 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 06:34:35,900 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-19 06:34:36,029 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 60 proven. 343 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 06:34:36,029 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 06:34:36,126 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-19 06:34:36,129 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-19 06:34:36,219 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 60 proven. 343 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 06:34:36,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702283161] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 06:34:36,219 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 06:34:36,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 38 [2024-11-19 06:34:36,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473769696] [2024-11-19 06:34:36,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 06:34:36,220 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-19 06:34:36,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:34:36,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-19 06:34:36,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1296, Unknown=0, NotChecked=0, Total=1406 [2024-11-19 06:34:36,221 INFO L87 Difference]: Start difference. First operand 388 states and 414 transitions. Second operand has 38 states, 38 states have (on average 4.815789473684211) internal successors, (183), 38 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) [2024-11-19 06:34:37,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:34:37,036 INFO L93 Difference]: Finished difference Result 649 states and 689 transitions. [2024-11-19 06:34:37,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-19 06:34:37,037 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 4.815789473684211) internal successors, (183), 38 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) Word has length 128 [2024-11-19 06:34:37,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:34:37,038 INFO L225 Difference]: With dead ends: 649 [2024-11-19 06:34:37,038 INFO L226 Difference]: Without dead ends: 409 [2024-11-19 06:34:37,039 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=179, Invalid=2077, Unknown=0, NotChecked=0, Total=2256 [2024-11-19 06:34:37,039 INFO L432 NwaCegarLoop]: 82 mSDtfsCounter, 38 mSDsluCounter, 2183 mSDsCounter, 0 mSdLazyCounter, 1524 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 2265 SdHoareTripleChecker+Invalid, 1532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-19 06:34:37,039 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 2265 Invalid, 1532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1524 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-19 06:34:37,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2024-11-19 06:34:37,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 400. [2024-11-19 06:34:37,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 398 states have (on average 1.07035175879397) internal successors, (426), 399 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:34:37,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 426 transitions. [2024-11-19 06:34:37,044 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 426 transitions. Word has length 128 [2024-11-19 06:34:37,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:34:37,044 INFO L471 AbstractCegarLoop]: Abstraction has 400 states and 426 transitions. [2024-11-19 06:34:37,044 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 4.815789473684211) internal successors, (183), 38 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) [2024-11-19 06:34:37,044 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 426 transitions. [2024-11-19 06:34:37,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2024-11-19 06:34:37,045 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:34:37,045 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 06:34:37,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-11-19 06:34:37,245 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 [2024-11-19 06:34:37,246 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 06:34:37,246 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:34:37,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1706133428, now seen corresponding path program 14 times [2024-11-19 06:34:37,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:34:37,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914960673] [2024-11-19 06:34:37,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 06:34:37,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:34:37,264 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 06:34:37,264 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 06:34:37,995 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 66 proven. 366 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 06:34:37,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:34:37,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914960673] [2024-11-19 06:34:37,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914960673] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 06:34:37,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824329151] [2024-11-19 06:34:37,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 06:34:37,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 06:34:37,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 06:34:38,001 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 06:34:38,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-19 06:34:38,140 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 06:34:38,141 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 06:34:38,143 INFO L255 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-11-19 06:34:38,145 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 06:34:38,659 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 91 proven. 341 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 06:34:38,659 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 06:34:39,227 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2024-11-19 06:34:39,591 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 91 proven. 341 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 06:34:39,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824329151] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 06:34:39,591 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 06:34:39,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 53 [2024-11-19 06:34:39,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376000850] [2024-11-19 06:34:39,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 06:34:39,595 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2024-11-19 06:34:39,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:34:39,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2024-11-19 06:34:39,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=413, Invalid=2449, Unknown=0, NotChecked=0, Total=2862 [2024-11-19 06:34:39,596 INFO L87 Difference]: Start difference. First operand 400 states and 426 transitions. Second operand has 54 states, 53 states have (on average 5.9245283018867925) internal successors, (314), 54 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:34:40,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:34:40,389 INFO L93 Difference]: Finished difference Result 465 states and 498 transitions. [2024-11-19 06:34:40,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-19 06:34:40,390 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 53 states have (on average 5.9245283018867925) internal successors, (314), 54 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 132 [2024-11-19 06:34:40,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:34:40,392 INFO L225 Difference]: With dead ends: 465 [2024-11-19 06:34:40,392 INFO L226 Difference]: Without dead ends: 459 [2024-11-19 06:34:40,393 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1118 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=444, Invalid=2526, Unknown=0, NotChecked=0, Total=2970 [2024-11-19 06:34:40,393 INFO L432 NwaCegarLoop]: 77 mSDtfsCounter, 43 mSDsluCounter, 1449 mSDsCounter, 0 mSdLazyCounter, 1680 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 1526 SdHoareTripleChecker+Invalid, 1682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-19 06:34:40,393 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 1526 Invalid, 1682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1680 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-19 06:34:40,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2024-11-19 06:34:40,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 430. [2024-11-19 06:34:40,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 428 states have (on average 1.0700934579439252) internal successors, (458), 429 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:34:40,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 458 transitions. [2024-11-19 06:34:40,405 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 458 transitions. Word has length 132 [2024-11-19 06:34:40,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:34:40,406 INFO L471 AbstractCegarLoop]: Abstraction has 430 states and 458 transitions. [2024-11-19 06:34:40,406 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 53 states have (on average 5.9245283018867925) internal successors, (314), 54 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:34:40,406 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 458 transitions. [2024-11-19 06:34:40,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2024-11-19 06:34:40,407 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:34:40,407 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 06:34:40,437 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-11-19 06:34:40,611 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 [2024-11-19 06:34:40,611 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)] === [2024-11-19 06:34:40,612 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:34:40,612 INFO L85 PathProgramCache]: Analyzing trace with hash -634998979, now seen corresponding path program 15 times [2024-11-19 06:34:40,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:34:40,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126926065] [2024-11-19 06:34:40,612 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 06:34:40,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:34:40,676 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-11-19 06:34:40,676 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 06:34:41,661 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 68 proven. 448 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 06:34:41,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:34:41,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126926065] [2024-11-19 06:34:41,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126926065] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 06:34:41,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302001437] [2024-11-19 06:34:41,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 06:34:41,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 06:34:41,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 06:34:41,663 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 06:34:41,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-19 06:34:41,892 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-11-19 06:34:41,892 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 06:34:41,900 INFO L255 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 73 conjuncts are in the unsatisfiable core [2024-11-19 06:34:41,902 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 06:34:42,135 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-19 06:34:42,279 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 68 proven. 448 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 06:34:42,279 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 06:34:42,379 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-19 06:34:42,380 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-19 06:34:42,474 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 68 proven. 448 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 06:34:42,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302001437] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 06:34:42,475 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 06:34:42,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 41 [2024-11-19 06:34:42,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223885488] [2024-11-19 06:34:42,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 06:34:42,475 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-11-19 06:34:42,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 06:34:42,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-11-19 06:34:42,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1522, Unknown=0, NotChecked=0, Total=1640 [2024-11-19 06:34:42,476 INFO L87 Difference]: Start difference. First operand 430 states and 458 transitions. Second operand has 41 states, 41 states have (on average 4.902439024390244) internal successors, (201), 41 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:34:43,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 06:34:43,437 INFO L93 Difference]: Finished difference Result 721 states and 765 transitions. [2024-11-19 06:34:43,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-19 06:34:43,438 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 4.902439024390244) internal successors, (201), 41 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 142 [2024-11-19 06:34:43,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 06:34:43,439 INFO L225 Difference]: With dead ends: 721 [2024-11-19 06:34:43,439 INFO L226 Difference]: Without dead ends: 451 [2024-11-19 06:34:43,440 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=194, Invalid=2458, Unknown=0, NotChecked=0, Total=2652 [2024-11-19 06:34:43,440 INFO L432 NwaCegarLoop]: 91 mSDtfsCounter, 44 mSDsluCounter, 2513 mSDsCounter, 0 mSdLazyCounter, 1747 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 2604 SdHoareTripleChecker+Invalid, 1756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-19 06:34:43,440 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 2604 Invalid, 1756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1747 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-19 06:34:43,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2024-11-19 06:34:43,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 442. [2024-11-19 06:34:43,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 440 states have (on average 1.0681818181818181) internal successors, (470), 441 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:34:43,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 470 transitions. [2024-11-19 06:34:43,444 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 470 transitions. Word has length 142 [2024-11-19 06:34:43,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 06:34:43,444 INFO L471 AbstractCegarLoop]: Abstraction has 442 states and 470 transitions. [2024-11-19 06:34:43,445 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 4.902439024390244) internal successors, (201), 41 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 06:34:43,445 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 470 transitions. [2024-11-19 06:34:43,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2024-11-19 06:34:43,446 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 06:34:43,446 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 06:34:43,461 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-11-19 06:34:43,650 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 [2024-11-19 06:34:43,650 INFO L396 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-19 06:34:43,651 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 06:34:43,651 INFO L85 PathProgramCache]: Analyzing trace with hash 957143130, now seen corresponding path program 16 times [2024-11-19 06:34:43,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 06:34:43,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674224309] [2024-11-19 06:34:43,651 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 06:34:43,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 06:34:43,714 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 06:34:43,714 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 06:34:48,086 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 0 proven. 549 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 06:34:48,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 06:34:48,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674224309] [2024-11-19 06:34:48,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674224309] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 06:34:48,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025343708] [2024-11-19 06:34:48,086 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 06:34:48,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 06:34:48,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 06:34:48,088 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 06:34:48,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-19 06:34:48,284 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 06:34:48,284 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 06:34:48,288 INFO L255 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 89 conjuncts are in the unsatisfiable core [2024-11-19 06:34:48,290 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 06:34:48,339 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 14 treesize of output 10