./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/valid-memsafety.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4a390ef5 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength.c -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 eb589a592aff310a2662d7a22b89559cebd75929901bc5e2cc7816fe45d47c92 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4a390ef-m [2024-10-24 16:20:30,302 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-24 16:20:30,375 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-24 16:20:30,382 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-24 16:20:30,384 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-24 16:20:30,408 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-24 16:20:30,409 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-24 16:20:30,410 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-24 16:20:30,410 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-24 16:20:30,412 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-24 16:20:30,412 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-24 16:20:30,413 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-24 16:20:30,413 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-24 16:20:30,415 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-24 16:20:30,415 INFO L153 SettingsManager]: * Use SBE=true [2024-10-24 16:20:30,415 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-24 16:20:30,415 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-24 16:20:30,416 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-24 16:20:30,416 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-24 16:20:30,416 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-24 16:20:30,417 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-24 16:20:30,417 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-24 16:20:30,417 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-24 16:20:30,418 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-24 16:20:30,418 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-24 16:20:30,418 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-24 16:20:30,418 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-24 16:20:30,419 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-24 16:20:30,419 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-24 16:20:30,419 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-24 16:20:30,420 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-24 16:20:30,420 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-24 16:20:30,420 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-24 16:20:30,420 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 16:20:30,421 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-24 16:20:30,421 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-24 16:20:30,421 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-24 16:20:30,421 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-24 16:20:30,422 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-24 16:20:30,422 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-24 16:20:30,422 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-24 16:20:30,423 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-24 16:20:30,423 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> eb589a592aff310a2662d7a22b89559cebd75929901bc5e2cc7816fe45d47c92 [2024-10-24 16:20:30,724 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-24 16:20:30,753 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-24 16:20:30,756 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-24 16:20:30,757 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-24 16:20:30,758 INFO L274 PluginConnector]: CDTParser initialized [2024-10-24 16:20:30,759 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength.c [2024-10-24 16:20:32,186 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-24 16:20:32,363 INFO L384 CDTParser]: Found 1 translation units. [2024-10-24 16:20:32,364 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength.c [2024-10-24 16:20:32,371 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c950d79c/f6f050a028b941b98166d69f4f4f047f/FLAG252544628 [2024-10-24 16:20:32,383 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c950d79c/f6f050a028b941b98166d69f4f4f047f [2024-10-24 16:20:32,385 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-24 16:20:32,387 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-24 16:20:32,388 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-24 16:20:32,388 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-24 16:20:32,394 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-24 16:20:32,395 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 04:20:32" (1/1) ... [2024-10-24 16:20:32,396 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@478cc502 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:20:32, skipping insertion in model container [2024-10-24 16:20:32,396 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 04:20:32" (1/1) ... [2024-10-24 16:20:32,420 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-24 16:20:32,611 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 16:20:32,618 INFO L200 MainTranslator]: Completed pre-run [2024-10-24 16:20:32,635 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 16:20:32,648 INFO L204 MainTranslator]: Completed translation [2024-10-24 16:20:32,649 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:20:32 WrapperNode [2024-10-24 16:20:32,649 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-24 16:20:32,650 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-24 16:20:32,650 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-24 16:20:32,650 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-24 16:20:32,656 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:20:32" (1/1) ... [2024-10-24 16:20:32,662 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:20:32" (1/1) ... [2024-10-24 16:20:32,676 INFO L138 Inliner]: procedures = 8, calls = 10, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 60 [2024-10-24 16:20:32,677 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-24 16:20:32,678 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-24 16:20:32,678 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-24 16:20:32,678 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-24 16:20:32,686 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:20:32" (1/1) ... [2024-10-24 16:20:32,686 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:20:32" (1/1) ... [2024-10-24 16:20:32,688 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:20:32" (1/1) ... [2024-10-24 16:20:32,698 INFO L175 MemorySlicer]: Split 3 memory accesses to 1 slices as follows [3]. 100 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0]. The 1 writes are split as follows [1]. [2024-10-24 16:20:32,698 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:20:32" (1/1) ... [2024-10-24 16:20:32,699 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:20:32" (1/1) ... [2024-10-24 16:20:32,703 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:20:32" (1/1) ... [2024-10-24 16:20:32,706 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:20:32" (1/1) ... [2024-10-24 16:20:32,708 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:20:32" (1/1) ... [2024-10-24 16:20:32,709 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:20:32" (1/1) ... [2024-10-24 16:20:32,710 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-24 16:20:32,711 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-24 16:20:32,711 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-24 16:20:32,711 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-24 16:20:32,717 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:20:32" (1/1) ... [2024-10-24 16:20:32,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 16:20:32,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:20:32,749 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-24 16:20:32,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-24 16:20:32,800 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-24 16:20:32,800 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-24 16:20:32,801 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-24 16:20:32,801 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-24 16:20:32,801 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-24 16:20:32,801 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-24 16:20:32,871 INFO L238 CfgBuilder]: Building ICFG [2024-10-24 16:20:32,873 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-24 16:20:33,149 INFO L? ?]: Removed 29 outVars from TransFormulas that were not future-live. [2024-10-24 16:20:33,149 INFO L287 CfgBuilder]: Performing block encoding [2024-10-24 16:20:33,202 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-24 16:20:33,203 INFO L314 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-24 16:20:33,204 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 04:20:33 BoogieIcfgContainer [2024-10-24 16:20:33,204 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-24 16:20:33,206 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-24 16:20:33,206 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-24 16:20:33,209 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-24 16:20:33,210 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 04:20:32" (1/3) ... [2024-10-24 16:20:33,210 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a249955 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 04:20:33, skipping insertion in model container [2024-10-24 16:20:33,210 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:20:32" (2/3) ... [2024-10-24 16:20:33,211 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a249955 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 04:20:33, skipping insertion in model container [2024-10-24 16:20:33,212 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 04:20:33" (3/3) ... [2024-10-24 16:20:33,213 INFO L112 eAbstractionObserver]: Analyzing ICFG ArraysOfVariableLength.c [2024-10-24 16:20:33,230 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-24 16:20:33,230 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2024-10-24 16:20:33,276 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-24 16:20:33,286 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;@6cc84167, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-24 16:20:33,287 INFO L334 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-10-24 16:20:33,291 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 21 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) [2024-10-24 16:20:33,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-10-24 16:20:33,297 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:20:33,298 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-10-24 16:20:33,298 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-10-24 16:20:33,306 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:20:33,307 INFO L85 PathProgramCache]: Analyzing trace with hash 3138242, now seen corresponding path program 1 times [2024-10-24 16:20:33,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:20:33,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404551910] [2024-10-24 16:20:33,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:20:33,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:20:33,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:20:33,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:20:33,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:20:33,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404551910] [2024-10-24 16:20:33,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404551910] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 16:20:33,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 16:20:33,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-24 16:20:33,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032436870] [2024-10-24 16:20:33,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 16:20:33,622 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 16:20:33,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:20:33,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 16:20:33,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-24 16:20:33,654 INFO L87 Difference]: Start difference. First operand has 22 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 21 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) Second operand has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:20:33,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:20:33,763 INFO L93 Difference]: Finished difference Result 31 states and 37 transitions. [2024-10-24 16:20:33,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-24 16:20:33,766 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2024-10-24 16:20:33,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:20:33,773 INFO L225 Difference]: With dead ends: 31 [2024-10-24 16:20:33,773 INFO L226 Difference]: Without dead ends: 30 [2024-10-24 16:20:33,775 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-24 16:20:33,780 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 16:20:33,781 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 30 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 16:20:33,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-10-24 16:20:33,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 24. [2024-10-24 16:20:33,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.6875) internal successors, (27), 23 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:20:33,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2024-10-24 16:20:33,814 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 4 [2024-10-24 16:20:33,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:20:33,814 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2024-10-24 16:20:33,815 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:20:33,816 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2024-10-24 16:20:33,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-10-24 16:20:33,816 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:20:33,816 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-10-24 16:20:33,816 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-24 16:20:33,817 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-10-24 16:20:33,818 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:20:33,818 INFO L85 PathProgramCache]: Analyzing trace with hash 97285412, now seen corresponding path program 1 times [2024-10-24 16:20:33,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:20:33,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427816665] [2024-10-24 16:20:33,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:20:33,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:20:33,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:20:33,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:20:33,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:20:33,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427816665] [2024-10-24 16:20:33,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427816665] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 16:20:33,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 16:20:33,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-24 16:20:33,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610751774] [2024-10-24 16:20:33,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 16:20:33,881 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 16:20:33,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:20:33,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 16:20:33,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 16:20:33,883 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:20:33,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:20:33,915 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2024-10-24 16:20:33,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 16:20:33,916 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2024-10-24 16:20:33,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:20:33,916 INFO L225 Difference]: With dead ends: 22 [2024-10-24 16:20:33,917 INFO L226 Difference]: Without dead ends: 22 [2024-10-24 16:20:33,917 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 16:20:33,919 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 13 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-24 16:20:33,920 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 10 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-24 16:20:33,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-10-24 16:20:33,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2024-10-24 16:20:33,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 16 states have (on average 1.5625) internal successors, (25), 21 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:20:33,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2024-10-24 16:20:33,924 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 5 [2024-10-24 16:20:33,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:20:33,925 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2024-10-24 16:20:33,925 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:20:33,925 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2024-10-24 16:20:33,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-10-24 16:20:33,926 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:20:33,926 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-10-24 16:20:33,926 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-24 16:20:33,927 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-10-24 16:20:33,927 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:20:33,927 INFO L85 PathProgramCache]: Analyzing trace with hash 97285413, now seen corresponding path program 1 times [2024-10-24 16:20:33,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:20:33,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27174139] [2024-10-24 16:20:33,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:20:33,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:20:33,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:20:34,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:20:34,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:20:34,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27174139] [2024-10-24 16:20:34,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27174139] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 16:20:34,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 16:20:34,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-24 16:20:34,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568660141] [2024-10-24 16:20:34,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 16:20:34,090 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 16:20:34,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:20:34,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 16:20:34,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 16:20:34,091 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:20:34,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:20:34,133 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2024-10-24 16:20:34,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 16:20:34,134 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2024-10-24 16:20:34,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:20:34,135 INFO L225 Difference]: With dead ends: 24 [2024-10-24 16:20:34,135 INFO L226 Difference]: Without dead ends: 24 [2024-10-24 16:20:34,135 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 16:20:34,137 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-24 16:20:34,137 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-24 16:20:34,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-10-24 16:20:34,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-10-24 16:20:34,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 18 states have (on average 1.5) internal successors, (27), 23 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:20:34,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2024-10-24 16:20:34,141 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 5 [2024-10-24 16:20:34,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:20:34,141 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2024-10-24 16:20:34,141 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:20:34,142 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2024-10-24 16:20:34,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-10-24 16:20:34,142 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:20:34,142 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-10-24 16:20:34,143 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-24 16:20:34,143 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-10-24 16:20:34,143 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:20:34,144 INFO L85 PathProgramCache]: Analyzing trace with hash -871894917, now seen corresponding path program 1 times [2024-10-24 16:20:34,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:20:34,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372567870] [2024-10-24 16:20:34,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:20:34,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:20:34,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:20:34,371 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:20:34,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:20:34,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372567870] [2024-10-24 16:20:34,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372567870] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:20:34,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310316325] [2024-10-24 16:20:34,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:20:34,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:20:34,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:20:34,376 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:20:34,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-24 16:20:34,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:20:34,459 INFO L255 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-10-24 16:20:34,467 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:20:34,681 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:20:34,682 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:20:34,882 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:20:34,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310316325] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:20:34,884 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:20:34,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 7, 5] total 14 [2024-10-24 16:20:34,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478665570] [2024-10-24 16:20:34,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:20:34,885 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-24 16:20:34,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:20:34,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-24 16:20:34,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2024-10-24 16:20:34,890 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 16 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:20:35,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:20:35,203 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2024-10-24 16:20:35,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-24 16:20:35,203 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 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 8 [2024-10-24 16:20:35,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:20:35,205 INFO L225 Difference]: With dead ends: 42 [2024-10-24 16:20:35,206 INFO L226 Difference]: Without dead ends: 42 [2024-10-24 16:20:35,206 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=311, Unknown=0, NotChecked=0, Total=420 [2024-10-24 16:20:35,209 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 70 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-24 16:20:35,210 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 31 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-24 16:20:35,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-10-24 16:20:35,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 34. [2024-10-24 16:20:35,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 33 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:20:35,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2024-10-24 16:20:35,220 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 8 [2024-10-24 16:20:35,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:20:35,220 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2024-10-24 16:20:35,221 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:20:35,221 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2024-10-24 16:20:35,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-10-24 16:20:35,221 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:20:35,222 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:20:35,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-24 16:20:35,426 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:20:35,427 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-10-24 16:20:35,428 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:20:35,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1258938598, now seen corresponding path program 1 times [2024-10-24 16:20:35,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:20:35,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503262145] [2024-10-24 16:20:35,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:20:35,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:20:35,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:20:35,521 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:20:35,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:20:35,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503262145] [2024-10-24 16:20:35,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503262145] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 16:20:35,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 16:20:35,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-24 16:20:35,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789991760] [2024-10-24 16:20:35,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 16:20:35,526 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 16:20:35,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:20:35,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 16:20:35,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-24 16:20:35,527 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:20:35,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:20:35,568 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2024-10-24 16:20:35,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-24 16:20:35,569 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-10-24 16:20:35,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:20:35,570 INFO L225 Difference]: With dead ends: 33 [2024-10-24 16:20:35,571 INFO L226 Difference]: Without dead ends: 33 [2024-10-24 16:20:35,572 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-24 16:20:35,573 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 17 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-24 16:20:35,573 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 13 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-24 16:20:35,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-10-24 16:20:35,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2024-10-24 16:20:35,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 32 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:20:35,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2024-10-24 16:20:35,581 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 9 [2024-10-24 16:20:35,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:20:35,582 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2024-10-24 16:20:35,582 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:20:35,582 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2024-10-24 16:20:35,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-10-24 16:20:35,584 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:20:35,584 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:20:35,585 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-24 16:20:35,585 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-10-24 16:20:35,585 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:20:35,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1258938597, now seen corresponding path program 1 times [2024-10-24 16:20:35,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:20:35,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131236854] [2024-10-24 16:20:35,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:20:35,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:20:35,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:20:35,739 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 16:20:35,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:20:35,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131236854] [2024-10-24 16:20:35,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131236854] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:20:35,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569410854] [2024-10-24 16:20:35,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:20:35,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:20:35,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:20:35,742 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:20:35,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-24 16:20:35,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:20:35,794 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-24 16:20:35,796 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:20:35,815 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-24 16:20:35,885 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 16:20:35,886 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:20:35,955 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 16:20:35,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569410854] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:20:35,956 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:20:35,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2024-10-24 16:20:35,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969301778] [2024-10-24 16:20:35,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:20:35,957 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-24 16:20:35,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:20:35,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-24 16:20:35,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-10-24 16:20:35,960 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:20:36,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:20:36,048 INFO L93 Difference]: Finished difference Result 44 states and 55 transitions. [2024-10-24 16:20:36,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-24 16:20:36,049 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-10-24 16:20:36,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:20:36,049 INFO L225 Difference]: With dead ends: 44 [2024-10-24 16:20:36,049 INFO L226 Difference]: Without dead ends: 44 [2024-10-24 16:20:36,050 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2024-10-24 16:20:36,050 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 39 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 16:20:36,050 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 17 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 16:20:36,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-10-24 16:20:36,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2024-10-24 16:20:36,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 1.4324324324324325) internal successors, (53), 41 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:20:36,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 53 transitions. [2024-10-24 16:20:36,059 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 53 transitions. Word has length 9 [2024-10-24 16:20:36,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:20:36,059 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 53 transitions. [2024-10-24 16:20:36,059 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:20:36,059 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 53 transitions. [2024-10-24 16:20:36,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-10-24 16:20:36,060 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:20:36,060 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-10-24 16:20:36,076 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-24 16:20:36,264 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,SelfDestructingSolverStorable5 [2024-10-24 16:20:36,265 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-10-24 16:20:36,265 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:20:36,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1383628461, now seen corresponding path program 1 times [2024-10-24 16:20:36,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:20:36,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709392284] [2024-10-24 16:20:36,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:20:36,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:20:36,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:20:36,387 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 16:20:36,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:20:36,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709392284] [2024-10-24 16:20:36,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709392284] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:20:36,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623313866] [2024-10-24 16:20:36,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:20:36,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:20:36,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:20:36,389 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:20:36,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-24 16:20:36,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:20:36,448 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-24 16:20:36,449 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:20:36,459 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-24 16:20:36,550 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 16:20:36,550 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:20:36,629 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 16:20:36,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623313866] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:20:36,630 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:20:36,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2024-10-24 16:20:36,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728357067] [2024-10-24 16:20:36,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:20:36,631 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-24 16:20:36,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:20:36,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-24 16:20:36,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-10-24 16:20:36,632 INFO L87 Difference]: Start difference. First operand 42 states and 53 transitions. Second operand has 9 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:20:36,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:20:36,719 INFO L93 Difference]: Finished difference Result 59 states and 73 transitions. [2024-10-24 16:20:36,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-24 16:20:36,720 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-10-24 16:20:36,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:20:36,720 INFO L225 Difference]: With dead ends: 59 [2024-10-24 16:20:36,720 INFO L226 Difference]: Without dead ends: 59 [2024-10-24 16:20:36,720 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2024-10-24 16:20:36,721 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 12 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 16:20:36,721 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 31 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 16:20:36,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-10-24 16:20:36,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2024-10-24 16:20:36,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 52 states have (on average 1.4038461538461537) internal successors, (73), 55 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:20:36,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 73 transitions. [2024-10-24 16:20:36,726 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 73 transitions. Word has length 12 [2024-10-24 16:20:36,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:20:36,727 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 73 transitions. [2024-10-24 16:20:36,727 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:20:36,727 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 73 transitions. [2024-10-24 16:20:36,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-10-24 16:20:36,727 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:20:36,727 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1] [2024-10-24 16:20:36,745 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-24 16:20:36,928 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:20:36,929 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-10-24 16:20:36,929 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:20:36,929 INFO L85 PathProgramCache]: Analyzing trace with hash -868395589, now seen corresponding path program 1 times [2024-10-24 16:20:36,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:20:36,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441228891] [2024-10-24 16:20:36,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:20:36,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:20:36,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:20:37,049 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 16:20:37,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:20:37,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441228891] [2024-10-24 16:20:37,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441228891] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:20:37,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923071485] [2024-10-24 16:20:37,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:20:37,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:20:37,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:20:37,052 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:20:37,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-24 16:20:37,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:20:37,112 INFO L255 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-24 16:20:37,113 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:20:37,171 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-24 16:20:37,171 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:20:37,210 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-24 16:20:37,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923071485] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:20:37,210 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:20:37,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2024-10-24 16:20:37,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44335021] [2024-10-24 16:20:37,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:20:37,211 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-24 16:20:37,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:20:37,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-24 16:20:37,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-10-24 16:20:37,212 INFO L87 Difference]: Start difference. First operand 56 states and 73 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:20:37,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:20:37,308 INFO L93 Difference]: Finished difference Result 53 states and 69 transitions. [2024-10-24 16:20:37,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-24 16:20:37,309 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2024-10-24 16:20:37,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:20:37,310 INFO L225 Difference]: With dead ends: 53 [2024-10-24 16:20:37,310 INFO L226 Difference]: Without dead ends: 53 [2024-10-24 16:20:37,310 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2024-10-24 16:20:37,311 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 12 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 16:20:37,311 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 29 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 16:20:37,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-10-24 16:20:37,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2024-10-24 16:20:37,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 47 states have (on average 1.3829787234042554) internal successors, (65), 50 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:20:37,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 65 transitions. [2024-10-24 16:20:37,316 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 65 transitions. Word has length 15 [2024-10-24 16:20:37,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:20:37,316 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 65 transitions. [2024-10-24 16:20:37,316 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:20:37,316 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 65 transitions. [2024-10-24 16:20:37,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-10-24 16:20:37,316 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:20:37,317 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1] [2024-10-24 16:20:37,334 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-24 16:20:37,517 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:20:37,517 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-10-24 16:20:37,518 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:20:37,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1267485314, now seen corresponding path program 1 times [2024-10-24 16:20:37,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:20:37,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462368002] [2024-10-24 16:20:37,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:20:37,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:20:37,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:20:37,717 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 16:20:37,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:20:37,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462368002] [2024-10-24 16:20:37,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462368002] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:20:37,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667906335] [2024-10-24 16:20:37,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:20:37,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:20:37,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:20:37,722 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:20:37,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-24 16:20:37,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:20:37,789 INFO L255 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-10-24 16:20:37,791 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:20:37,849 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 16:20:37,850 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:20:37,995 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 16:20:37,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667906335] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:20:37,997 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:20:37,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6] total 13 [2024-10-24 16:20:37,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510369088] [2024-10-24 16:20:37,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:20:37,998 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-24 16:20:37,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:20:37,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-24 16:20:37,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2024-10-24 16:20:37,999 INFO L87 Difference]: Start difference. First operand 51 states and 65 transitions. Second operand has 15 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:20:38,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:20:38,626 INFO L93 Difference]: Finished difference Result 123 states and 162 transitions. [2024-10-24 16:20:38,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-10-24 16:20:38,626 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2024-10-24 16:20:38,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:20:38,627 INFO L225 Difference]: With dead ends: 123 [2024-10-24 16:20:38,627 INFO L226 Difference]: Without dead ends: 123 [2024-10-24 16:20:38,628 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=215, Invalid=715, Unknown=0, NotChecked=0, Total=930 [2024-10-24 16:20:38,628 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 181 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-24 16:20:38,629 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 24 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-24 16:20:38,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2024-10-24 16:20:38,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 88. [2024-10-24 16:20:38,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 84 states have (on average 1.4404761904761905) internal successors, (121), 87 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:20:38,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 121 transitions. [2024-10-24 16:20:38,641 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 121 transitions. Word has length 18 [2024-10-24 16:20:38,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:20:38,641 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 121 transitions. [2024-10-24 16:20:38,642 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:20:38,642 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 121 transitions. [2024-10-24 16:20:38,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-10-24 16:20:38,642 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:20:38,642 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 1, 1] [2024-10-24 16:20:38,661 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-24 16:20:38,843 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:20:38,844 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-10-24 16:20:38,844 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:20:38,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1697370771, now seen corresponding path program 2 times [2024-10-24 16:20:38,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:20:38,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431204116] [2024-10-24 16:20:38,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:20:38,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:20:38,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:20:38,988 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 16:20:38,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:20:38,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431204116] [2024-10-24 16:20:38,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431204116] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:20:38,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891131325] [2024-10-24 16:20:38,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 16:20:38,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:20:38,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:20:38,991 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:20:38,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-24 16:20:39,064 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 16:20:39,065 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 16:20:39,066 INFO L255 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-24 16:20:39,067 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:20:39,144 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 8 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 16:20:39,145 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:20:39,201 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 8 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 16:20:39,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891131325] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:20:39,202 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:20:39,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2024-10-24 16:20:39,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398691406] [2024-10-24 16:20:39,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:20:39,203 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-24 16:20:39,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:20:39,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-24 16:20:39,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2024-10-24 16:20:39,204 INFO L87 Difference]: Start difference. First operand 88 states and 121 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:20:39,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:20:39,345 INFO L93 Difference]: Finished difference Result 83 states and 111 transitions. [2024-10-24 16:20:39,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-24 16:20:39,346 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2024-10-24 16:20:39,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:20:39,347 INFO L225 Difference]: With dead ends: 83 [2024-10-24 16:20:39,347 INFO L226 Difference]: Without dead ends: 83 [2024-10-24 16:20:39,348 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2024-10-24 16:20:39,348 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 20 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 16:20:39,349 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 24 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 16:20:39,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2024-10-24 16:20:39,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 81. [2024-10-24 16:20:39,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 77 states have (on average 1.3896103896103895) internal successors, (107), 80 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:20:39,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 107 transitions. [2024-10-24 16:20:39,356 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 107 transitions. Word has length 21 [2024-10-24 16:20:39,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:20:39,356 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 107 transitions. [2024-10-24 16:20:39,360 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:20:39,360 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 107 transitions. [2024-10-24 16:20:39,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-10-24 16:20:39,361 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:20:39,361 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:20:39,378 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-24 16:20:39,561 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:20:39,562 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-10-24 16:20:39,562 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:20:39,562 INFO L85 PathProgramCache]: Analyzing trace with hash 752597937, now seen corresponding path program 1 times [2024-10-24 16:20:39,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:20:39,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381714602] [2024-10-24 16:20:39,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:20:39,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:20:39,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:20:39,688 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-10-24 16:20:39,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:20:39,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381714602] [2024-10-24 16:20:39,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381714602] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 16:20:39,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 16:20:39,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 16:20:39,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353537596] [2024-10-24 16:20:39,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 16:20:39,690 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 16:20:39,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:20:39,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 16:20:39,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-24 16:20:39,691 INFO L87 Difference]: Start difference. First operand 81 states and 107 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:20:39,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:20:39,727 INFO L93 Difference]: Finished difference Result 81 states and 106 transitions. [2024-10-24 16:20:39,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-24 16:20:39,728 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2024-10-24 16:20:39,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:20:39,729 INFO L225 Difference]: With dead ends: 81 [2024-10-24 16:20:39,729 INFO L226 Difference]: Without dead ends: 81 [2024-10-24 16:20:39,729 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-24 16:20:39,729 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 11 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-24 16:20:39,730 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 14 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-24 16:20:39,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-10-24 16:20:39,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2024-10-24 16:20:39,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 77 states have (on average 1.3766233766233766) internal successors, (106), 80 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:20:39,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 106 transitions. [2024-10-24 16:20:39,736 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 106 transitions. Word has length 24 [2024-10-24 16:20:39,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:20:39,736 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 106 transitions. [2024-10-24 16:20:39,736 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:20:39,736 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 106 transitions. [2024-10-24 16:20:39,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-10-24 16:20:39,737 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:20:39,737 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1] [2024-10-24 16:20:39,737 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-10-24 16:20:39,737 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-10-24 16:20:39,737 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:20:39,737 INFO L85 PathProgramCache]: Analyzing trace with hash 2035486438, now seen corresponding path program 3 times [2024-10-24 16:20:39,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:20:39,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849372315] [2024-10-24 16:20:39,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:20:39,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:20:39,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:20:39,849 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 27 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-24 16:20:39,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:20:39,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849372315] [2024-10-24 16:20:39,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849372315] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:20:39,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913119805] [2024-10-24 16:20:39,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-24 16:20:39,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:20:39,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:20:39,852 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:20:39,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-24 16:20:39,939 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-24 16:20:39,940 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 16:20:39,941 INFO L255 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-24 16:20:39,944 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:20:40,111 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 1 proven. 21 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-10-24 16:20:40,111 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:20:40,518 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-10-24 16:20:40,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913119805] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:20:40,518 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:20:40,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2024-10-24 16:20:40,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114895796] [2024-10-24 16:20:40,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:20:40,519 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-24 16:20:40,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:20:40,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-24 16:20:40,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2024-10-24 16:20:40,520 INFO L87 Difference]: Start difference. First operand 81 states and 106 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:20:40,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:20:40,879 INFO L93 Difference]: Finished difference Result 80 states and 92 transitions. [2024-10-24 16:20:40,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-24 16:20:40,879 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2024-10-24 16:20:40,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:20:40,880 INFO L225 Difference]: With dead ends: 80 [2024-10-24 16:20:40,880 INFO L226 Difference]: Without dead ends: 80 [2024-10-24 16:20:40,880 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=144, Invalid=456, Unknown=0, NotChecked=0, Total=600 [2024-10-24 16:20:40,881 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 34 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-24 16:20:40,881 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 24 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-24 16:20:40,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2024-10-24 16:20:40,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 51. [2024-10-24 16:20:40,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 48 states have (on average 1.1875) internal successors, (57), 50 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:20:40,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2024-10-24 16:20:40,890 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 25 [2024-10-24 16:20:40,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:20:40,891 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2024-10-24 16:20:40,891 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:20:40,891 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2024-10-24 16:20:40,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-10-24 16:20:40,891 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:20:40,892 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 3, 3, 3, 1, 1] [2024-10-24 16:20:40,910 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-24 16:20:41,092 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:20:41,093 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-10-24 16:20:41,093 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:20:41,093 INFO L85 PathProgramCache]: Analyzing trace with hash 1620066864, now seen corresponding path program 2 times [2024-10-24 16:20:41,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:20:41,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232290348] [2024-10-24 16:20:41,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:20:41,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:20:41,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:20:41,337 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-10-24 16:20:41,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:20:41,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232290348] [2024-10-24 16:20:41,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232290348] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:20:41,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594709679] [2024-10-24 16:20:41,338 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 16:20:41,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:20:41,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:20:41,340 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:20:41,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-24 16:20:41,432 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 16:20:41,432 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 16:20:41,434 INFO L255 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-10-24 16:20:41,436 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:20:41,445 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-24 16:20:41,617 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-10-24 16:20:41,618 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:20:41,796 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-10-24 16:20:41,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594709679] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:20:41,796 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:20:41,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2024-10-24 16:20:41,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992983538] [2024-10-24 16:20:41,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:20:41,797 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-24 16:20:41,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:20:41,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-24 16:20:41,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2024-10-24 16:20:41,798 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand has 14 states, 13 states have (on average 4.153846153846154) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:20:41,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:20:41,979 INFO L93 Difference]: Finished difference Result 67 states and 77 transitions. [2024-10-24 16:20:41,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-24 16:20:41,980 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 4.153846153846154) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2024-10-24 16:20:41,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:20:41,980 INFO L225 Difference]: With dead ends: 67 [2024-10-24 16:20:41,980 INFO L226 Difference]: Without dead ends: 67 [2024-10-24 16:20:41,981 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=268, Unknown=0, NotChecked=0, Total=380 [2024-10-24 16:20:41,981 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 28 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 16:20:41,983 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 31 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 16:20:41,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-10-24 16:20:41,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 63. [2024-10-24 16:20:41,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 60 states have (on average 1.2166666666666666) internal successors, (73), 62 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:20:41,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 73 transitions. [2024-10-24 16:20:41,989 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 73 transitions. Word has length 32 [2024-10-24 16:20:41,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:20:41,989 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 73 transitions. [2024-10-24 16:20:41,989 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 4.153846153846154) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:20:41,989 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 73 transitions. [2024-10-24 16:20:41,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-10-24 16:20:41,990 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:20:41,990 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:20:42,010 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-10-24 16:20:42,190 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-10-24 16:20:42,191 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-10-24 16:20:42,192 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:20:42,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1629543372, now seen corresponding path program 1 times [2024-10-24 16:20:42,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:20:42,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373210830] [2024-10-24 16:20:42,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:20:42,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:20:42,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:20:42,290 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-10-24 16:20:42,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:20:42,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373210830] [2024-10-24 16:20:42,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373210830] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:20:42,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807727726] [2024-10-24 16:20:42,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:20:42,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:20:42,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:20:42,292 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:20:42,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-24 16:20:42,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:20:42,389 INFO L255 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-24 16:20:42,391 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:20:42,501 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 37 proven. 35 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-24 16:20:42,501 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:20:42,608 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 37 proven. 35 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-24 16:20:42,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807727726] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:20:42,608 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:20:42,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 16 [2024-10-24 16:20:42,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733852357] [2024-10-24 16:20:42,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:20:42,609 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-24 16:20:42,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:20:42,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-24 16:20:42,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2024-10-24 16:20:42,610 INFO L87 Difference]: Start difference. First operand 63 states and 73 transitions. Second operand has 17 states, 17 states have (on average 4.117647058823529) internal successors, (70), 16 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:20:42,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:20:42,994 INFO L93 Difference]: Finished difference Result 120 states and 143 transitions. [2024-10-24 16:20:42,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-10-24 16:20:42,994 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.117647058823529) internal successors, (70), 16 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2024-10-24 16:20:42,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:20:42,995 INFO L225 Difference]: With dead ends: 120 [2024-10-24 16:20:42,995 INFO L226 Difference]: Without dead ends: 120 [2024-10-24 16:20:42,996 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 61 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=307, Invalid=953, Unknown=0, NotChecked=0, Total=1260 [2024-10-24 16:20:42,996 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 111 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-24 16:20:42,996 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 35 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-24 16:20:42,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2024-10-24 16:20:42,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 93. [2024-10-24 16:20:43,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 90 states have (on average 1.2333333333333334) internal successors, (111), 92 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:20:43,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 111 transitions. [2024-10-24 16:20:43,003 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 111 transitions. Word has length 38 [2024-10-24 16:20:43,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:20:43,003 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 111 transitions. [2024-10-24 16:20:43,003 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.117647058823529) internal successors, (70), 16 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:20:43,003 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 111 transitions. [2024-10-24 16:20:43,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-10-24 16:20:43,004 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:20:43,004 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 9, 4, 3, 3, 3, 1, 1] [2024-10-24 16:20:43,018 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-24 16:20:43,205 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-10-24 16:20:43,205 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-10-24 16:20:43,205 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:20:43,206 INFO L85 PathProgramCache]: Analyzing trace with hash 1105608688, now seen corresponding path program 3 times [2024-10-24 16:20:43,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:20:43,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078278675] [2024-10-24 16:20:43,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:20:43,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:20:43,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:20:43,454 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 53 proven. 121 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-24 16:20:43,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:20:43,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078278675] [2024-10-24 16:20:43,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078278675] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:20:43,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060511715] [2024-10-24 16:20:43,455 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-24 16:20:43,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:20:43,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:20:43,457 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:20:43,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-24 16:20:43,545 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-24 16:20:43,545 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 16:20:43,546 INFO L255 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-24 16:20:43,548 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:20:43,561 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-24 16:20:43,797 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 6 proven. 96 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-10-24 16:20:43,797 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:20:44,047 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-10-24 16:20:44,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060511715] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:20:44,048 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:20:44,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 4, 4] total 20 [2024-10-24 16:20:44,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774534105] [2024-10-24 16:20:44,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:20:44,049 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-24 16:20:44,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:20:44,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-24 16:20:44,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2024-10-24 16:20:44,050 INFO L87 Difference]: Start difference. First operand 93 states and 111 transitions. Second operand has 21 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 20 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:20:44,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:20:44,715 INFO L93 Difference]: Finished difference Result 81 states and 94 transitions. [2024-10-24 16:20:44,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-10-24 16:20:44,715 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 20 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2024-10-24 16:20:44,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:20:44,716 INFO L225 Difference]: With dead ends: 81 [2024-10-24 16:20:44,716 INFO L226 Difference]: Without dead ends: 81 [2024-10-24 16:20:44,717 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=415, Invalid=1477, Unknown=0, NotChecked=0, Total=1892 [2024-10-24 16:20:44,717 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 53 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-24 16:20:44,718 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 48 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-24 16:20:44,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-10-24 16:20:44,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 70. [2024-10-24 16:20:44,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 68 states have (on average 1.1764705882352942) internal successors, (80), 69 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:20:44,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 80 transitions. [2024-10-24 16:20:44,720 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 80 transitions. Word has length 44 [2024-10-24 16:20:44,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:20:44,720 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 80 transitions. [2024-10-24 16:20:44,721 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 20 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:20:44,721 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 80 transitions. [2024-10-24 16:20:44,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-10-24 16:20:44,722 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:20:44,722 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 9, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:20:44,739 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-10-24 16:20:44,926 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,SelfDestructingSolverStorable14 [2024-10-24 16:20:44,927 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-10-24 16:20:44,927 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:20:44,927 INFO L85 PathProgramCache]: Analyzing trace with hash -578569787, now seen corresponding path program 2 times [2024-10-24 16:20:44,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:20:44,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289609274] [2024-10-24 16:20:44,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:20:44,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:20:44,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:20:45,075 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 168 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-24 16:20:45,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:20:45,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289609274] [2024-10-24 16:20:45,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289609274] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:20:45,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945162898] [2024-10-24 16:20:45,076 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 16:20:45,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:20:45,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:20:45,078 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:20:45,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-24 16:20:45,152 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-24 16:20:45,153 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 16:20:45,153 INFO L255 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-24 16:20:45,155 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:20:45,354 WARN L873 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~#b~0#1.base_27| Int)) (and (= (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_27|) 0) (= |c_#valid| (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_27| 0)))) is different from true [2024-10-24 16:20:45,355 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2024-10-24 16:20:45,356 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 16:20:45,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945162898] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 16:20:45,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-24 16:20:45,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 9 [2024-10-24 16:20:45,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689678724] [2024-10-24 16:20:45,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 16:20:45,357 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 16:20:45,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:20:45,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 16:20:45,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=43, Unknown=1, NotChecked=14, Total=90 [2024-10-24 16:20:45,357 INFO L87 Difference]: Start difference. First operand 70 states and 80 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:20:45,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:20:45,391 INFO L93 Difference]: Finished difference Result 71 states and 80 transitions. [2024-10-24 16:20:45,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-24 16:20:45,392 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 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 54 [2024-10-24 16:20:45,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:20:45,392 INFO L225 Difference]: With dead ends: 71 [2024-10-24 16:20:45,392 INFO L226 Difference]: Without dead ends: 70 [2024-10-24 16:20:45,392 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=43, Unknown=1, NotChecked=14, Total=90 [2024-10-24 16:20:45,393 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-24 16:20:45,393 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 8 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 17 Unchecked, 0.0s Time] [2024-10-24 16:20:45,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-10-24 16:20:45,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2024-10-24 16:20:45,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 68 states have (on average 1.1029411764705883) internal successors, (75), 69 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:20:45,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 75 transitions. [2024-10-24 16:20:45,395 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 75 transitions. Word has length 54 [2024-10-24 16:20:45,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:20:45,395 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 75 transitions. [2024-10-24 16:20:45,399 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:20:45,399 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 75 transitions. [2024-10-24 16:20:45,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-10-24 16:20:45,400 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:20:45,400 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 9, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1] [2024-10-24 16:20:45,418 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-10-24 16:20:45,600 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,SelfDestructingSolverStorable15 [2024-10-24 16:20:45,601 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-10-24 16:20:45,601 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:20:45,601 INFO L85 PathProgramCache]: Analyzing trace with hash -755789913, now seen corresponding path program 1 times [2024-10-24 16:20:45,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:20:45,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571794875] [2024-10-24 16:20:45,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:20:45,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:20:45,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:20:45,740 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 168 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-10-24 16:20:45,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:20:45,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571794875] [2024-10-24 16:20:45,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571794875] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:20:45,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249486375] [2024-10-24 16:20:45,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:20:45,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:20:45,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:20:45,743 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:20:45,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-24 16:20:45,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:20:45,864 INFO L255 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-24 16:20:45,867 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:20:46,036 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 92 proven. 88 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-10-24 16:20:46,036 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:20:46,183 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 92 proven. 88 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-10-24 16:20:46,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249486375] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:20:46,184 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:20:46,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 10] total 20 [2024-10-24 16:20:46,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376934058] [2024-10-24 16:20:46,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:20:46,185 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-24 16:20:46,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:20:46,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-24 16:20:46,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2024-10-24 16:20:46,186 INFO L87 Difference]: Start difference. First operand 70 states and 75 transitions. Second operand has 21 states, 21 states have (on average 4.285714285714286) internal successors, (90), 20 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:20:46,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:20:46,728 INFO L93 Difference]: Finished difference Result 115 states and 124 transitions. [2024-10-24 16:20:46,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-10-24 16:20:46,729 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.285714285714286) internal successors, (90), 20 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2024-10-24 16:20:46,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:20:46,729 INFO L225 Difference]: With dead ends: 115 [2024-10-24 16:20:46,729 INFO L226 Difference]: Without dead ends: 115 [2024-10-24 16:20:46,730 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 91 SyntacticMatches, 5 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=479, Invalid=1683, Unknown=0, NotChecked=0, Total=2162 [2024-10-24 16:20:46,731 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 145 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-24 16:20:46,731 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 41 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-24 16:20:46,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2024-10-24 16:20:46,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 92. [2024-10-24 16:20:46,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 90 states have (on average 1.1) internal successors, (99), 91 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:20:46,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 99 transitions. [2024-10-24 16:20:46,733 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 99 transitions. Word has length 55 [2024-10-24 16:20:46,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:20:46,734 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 99 transitions. [2024-10-24 16:20:46,734 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.285714285714286) internal successors, (90), 20 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:20:46,734 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 99 transitions. [2024-10-24 16:20:46,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-10-24 16:20:46,735 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:20:46,735 INFO L215 NwaCegarLoop]: trace histogram [14, 14, 14, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1] [2024-10-24 16:20:46,752 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-10-24 16:20:46,935 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,SelfDestructingSolverStorable16 [2024-10-24 16:20:46,936 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-10-24 16:20:46,936 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:20:46,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1283928149, now seen corresponding path program 2 times [2024-10-24 16:20:46,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:20:46,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649806078] [2024-10-24 16:20:46,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:20:46,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:20:46,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:20:47,191 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-10-24 16:20:47,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:20:47,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649806078] [2024-10-24 16:20:47,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649806078] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:20:47,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82776616] [2024-10-24 16:20:47,192 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 16:20:47,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:20:47,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:20:47,194 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:20:47,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-24 16:20:47,331 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 16:20:47,332 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 16:20:47,337 INFO L255 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-24 16:20:47,340 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:20:47,558 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 206 proven. 177 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-10-24 16:20:47,559 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:20:47,749 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 206 proven. 177 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-10-24 16:20:47,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82776616] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:20:47,749 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:20:47,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 12] total 24 [2024-10-24 16:20:47,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385928840] [2024-10-24 16:20:47,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:20:47,750 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-10-24 16:20:47,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:20:47,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-10-24 16:20:47,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=481, Unknown=0, NotChecked=0, Total=600 [2024-10-24 16:20:47,751 INFO L87 Difference]: Start difference. First operand 92 states and 99 transitions. Second operand has 25 states, 25 states have (on average 4.4) internal successors, (110), 24 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:20:48,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:20:48,445 INFO L93 Difference]: Finished difference Result 143 states and 154 transitions. [2024-10-24 16:20:48,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-10-24 16:20:48,445 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.4) internal successors, (110), 24 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2024-10-24 16:20:48,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:20:48,446 INFO L225 Difference]: With dead ends: 143 [2024-10-24 16:20:48,446 INFO L226 Difference]: Without dead ends: 143 [2024-10-24 16:20:48,448 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 125 SyntacticMatches, 6 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 863 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=700, Invalid=2722, Unknown=0, NotChecked=0, Total=3422 [2024-10-24 16:20:48,448 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 145 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-24 16:20:48,448 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 61 Invalid, 654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 620 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-24 16:20:48,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2024-10-24 16:20:48,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 117. [2024-10-24 16:20:48,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 115 states have (on average 1.0956521739130434) internal successors, (126), 116 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) [2024-10-24 16:20:48,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 126 transitions. [2024-10-24 16:20:48,451 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 126 transitions. Word has length 74 [2024-10-24 16:20:48,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:20:48,452 INFO L471 AbstractCegarLoop]: Abstraction has 117 states and 126 transitions. [2024-10-24 16:20:48,452 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.4) internal successors, (110), 24 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:20:48,452 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 126 transitions. [2024-10-24 16:20:48,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-10-24 16:20:48,453 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:20:48,453 INFO L215 NwaCegarLoop]: trace histogram [20, 20, 20, 7, 7, 7, 7, 2, 1, 1, 1, 1, 1, 1] [2024-10-24 16:20:48,470 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-10-24 16:20:48,657 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,SelfDestructingSolverStorable17 [2024-10-24 16:20:48,658 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-10-24 16:20:48,658 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:20:48,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1311290468, now seen corresponding path program 3 times [2024-10-24 16:20:48,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:20:48,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975127910] [2024-10-24 16:20:48,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:20:48,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:20:48,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:20:48,957 INFO L134 CoverageAnalysis]: Checked inductivity of 803 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 801 trivial. 0 not checked. [2024-10-24 16:20:48,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:20:48,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975127910] [2024-10-24 16:20:48,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975127910] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:20:48,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26065206] [2024-10-24 16:20:48,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-24 16:20:48,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:20:48,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:20:48,960 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:20:48,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-24 16:20:49,072 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-24 16:20:49,072 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 16:20:49,073 INFO L255 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-24 16:20:49,075 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:20:49,084 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-24 16:20:49,401 INFO L134 CoverageAnalysis]: Checked inductivity of 803 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 801 trivial. 0 not checked. [2024-10-24 16:20:49,401 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 16:20:49,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26065206] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 16:20:49,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-24 16:20:49,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 8 [2024-10-24 16:20:49,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379102954] [2024-10-24 16:20:49,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 16:20:49,403 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-24 16:20:49,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:20:49,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-24 16:20:49,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2024-10-24 16:20:49,404 INFO L87 Difference]: Start difference. First operand 117 states and 126 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:20:49,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:20:49,435 INFO L93 Difference]: Finished difference Result 116 states and 120 transitions. [2024-10-24 16:20:49,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-24 16:20:49,435 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2024-10-24 16:20:49,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:20:49,436 INFO L225 Difference]: With dead ends: 116 [2024-10-24 16:20:49,436 INFO L226 Difference]: Without dead ends: 116 [2024-10-24 16:20:49,436 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2024-10-24 16:20:49,437 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 13 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-24 16:20:49,437 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 9 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-24 16:20:49,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2024-10-24 16:20:49,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2024-10-24 16:20:49,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.0434782608695652) internal successors, (120), 115 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:20:49,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 120 transitions. [2024-10-24 16:20:49,440 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 120 transitions. Word has length 96 [2024-10-24 16:20:49,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:20:49,440 INFO L471 AbstractCegarLoop]: Abstraction has 116 states and 120 transitions. [2024-10-24 16:20:49,440 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:20:49,440 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 120 transitions. [2024-10-24 16:20:49,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2024-10-24 16:20:49,444 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:20:49,444 INFO L215 NwaCegarLoop]: trace histogram [20, 20, 20, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2024-10-24 16:20:49,461 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-10-24 16:20:49,644 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:20:49,645 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-10-24 16:20:49,645 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:20:49,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1258232295, now seen corresponding path program 1 times [2024-10-24 16:20:49,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:20:49,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153292249] [2024-10-24 16:20:49,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:20:49,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:20:49,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:20:49,903 INFO L134 CoverageAnalysis]: Checked inductivity of 871 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 801 trivial. 0 not checked. [2024-10-24 16:20:49,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:20:49,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153292249] [2024-10-24 16:20:49,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153292249] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:20:49,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190255242] [2024-10-24 16:20:49,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:20:49,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:20:49,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:20:49,906 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:20:49,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-10-24 16:20:50,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:20:50,082 INFO L255 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-24 16:20:50,084 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:20:50,338 INFO L134 CoverageAnalysis]: Checked inductivity of 871 backedges. 415 proven. 311 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2024-10-24 16:20:50,338 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 16:20:50,571 INFO L134 CoverageAnalysis]: Checked inductivity of 871 backedges. 415 proven. 311 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2024-10-24 16:20:50,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190255242] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 16:20:50,571 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 16:20:50,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14, 14] total 29 [2024-10-24 16:20:50,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301962302] [2024-10-24 16:20:50,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 16:20:50,572 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-10-24 16:20:50,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:20:50,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-10-24 16:20:50,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=656, Unknown=0, NotChecked=0, Total=812 [2024-10-24 16:20:50,573 INFO L87 Difference]: Start difference. First operand 116 states and 120 transitions. Second operand has 29 states, 29 states have (on average 4.0) internal successors, (116), 29 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) [2024-10-24 16:20:51,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:20:51,328 INFO L93 Difference]: Finished difference Result 173 states and 179 transitions. [2024-10-24 16:20:51,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-10-24 16:20:51,328 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.0) internal successors, (116), 29 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 115 [2024-10-24 16:20:51,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:20:51,329 INFO L225 Difference]: With dead ends: 173 [2024-10-24 16:20:51,329 INFO L226 Difference]: Without dead ends: 173 [2024-10-24 16:20:51,331 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 211 SyntacticMatches, 7 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1350 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=975, Invalid=4137, Unknown=0, NotChecked=0, Total=5112 [2024-10-24 16:20:51,331 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 373 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-24 16:20:51,332 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [373 Valid, 57 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 613 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-24 16:20:51,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2024-10-24 16:20:51,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 144. [2024-10-24 16:20:51,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 1.0419580419580419) internal successors, (149), 143 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:20:51,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 149 transitions. [2024-10-24 16:20:51,335 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 149 transitions. Word has length 115 [2024-10-24 16:20:51,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:20:51,335 INFO L471 AbstractCegarLoop]: Abstraction has 144 states and 149 transitions. [2024-10-24 16:20:51,335 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.0) internal successors, (116), 29 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) [2024-10-24 16:20:51,336 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 149 transitions. [2024-10-24 16:20:51,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2024-10-24 16:20:51,337 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 16:20:51,337 INFO L215 NwaCegarLoop]: trace histogram [27, 27, 27, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1] [2024-10-24 16:20:51,352 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-10-24 16:20:51,537 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:20:51,538 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-10-24 16:20:51,538 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 16:20:51,538 INFO L85 PathProgramCache]: Analyzing trace with hash -184856540, now seen corresponding path program 2 times [2024-10-24 16:20:51,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 16:20:51,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344996822] [2024-10-24 16:20:51,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 16:20:51,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 16:20:51,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 16:20:51,870 INFO L134 CoverageAnalysis]: Checked inductivity of 1481 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 1389 trivial. 0 not checked. [2024-10-24 16:20:51,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 16:20:51,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344996822] [2024-10-24 16:20:51,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344996822] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 16:20:51,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252884398] [2024-10-24 16:20:51,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 16:20:51,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:20:51,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 16:20:51,873 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 16:20:51,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-10-24 16:20:51,993 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-24 16:20:51,993 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 16:20:51,995 INFO L255 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-24 16:20:51,998 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 16:20:52,453 WARN L873 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~#b~0#1.base_28| Int)) (and (= (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_28|) 0) (= |c_#valid| (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_28| 0)))) is different from true [2024-10-24 16:20:52,454 INFO L134 CoverageAnalysis]: Checked inductivity of 1481 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1481 trivial. 0 not checked. [2024-10-24 16:20:52,454 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 16:20:52,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252884398] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 16:20:52,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-24 16:20:52,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [11] total 13 [2024-10-24 16:20:52,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167166220] [2024-10-24 16:20:52,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 16:20:52,455 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 16:20:52,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 16:20:52,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 16:20:52,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=76, Unknown=1, NotChecked=20, Total=156 [2024-10-24 16:20:52,456 INFO L87 Difference]: Start difference. First operand 144 states and 149 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:20:52,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 16:20:52,466 INFO L93 Difference]: Finished difference Result 143 states and 148 transitions. [2024-10-24 16:20:52,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-24 16:20:52,466 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 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 143 [2024-10-24 16:20:52,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 16:20:52,466 INFO L225 Difference]: With dead ends: 143 [2024-10-24 16:20:52,466 INFO L226 Difference]: Without dead ends: 0 [2024-10-24 16:20:52,467 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=76, Unknown=1, NotChecked=20, Total=156 [2024-10-24 16:20:52,467 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-24 16:20:52,467 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 7 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 14 Unchecked, 0.0s Time] [2024-10-24 16:20:52,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-10-24 16:20:52,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-10-24 16:20:52,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:20:52,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-10-24 16:20:52,468 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 143 [2024-10-24 16:20:52,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 16:20:52,468 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-10-24 16:20:52,468 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 16:20:52,468 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-10-24 16:20:52,468 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-10-24 16:20:52,471 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX (7 of 8 remaining) [2024-10-24 16:20:52,471 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 8 remaining) [2024-10-24 16:20:52,471 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 8 remaining) [2024-10-24 16:20:52,471 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 8 remaining) [2024-10-24 16:20:52,472 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 8 remaining) [2024-10-24 16:20:52,472 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 8 remaining) [2024-10-24 16:20:52,472 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 8 remaining) [2024-10-24 16:20:52,472 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK (0 of 8 remaining) [2024-10-24 16:20:52,486 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-10-24 16:20:52,673 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 16:20:52,676 INFO L407 BasicCegarLoop]: Path program histogram: [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 16:20:52,677 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-10-24 16:20:52,679 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 04:20:52 BoogieIcfgContainer [2024-10-24 16:20:52,679 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-10-24 16:20:52,680 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-10-24 16:20:52,680 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-10-24 16:20:52,680 INFO L274 PluginConnector]: Witness Printer initialized [2024-10-24 16:20:52,680 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 04:20:33" (3/4) ... [2024-10-24 16:20:52,682 INFO L139 WitnessPrinter]: Generating witness for correct program [2024-10-24 16:20:52,688 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2024-10-24 16:20:52,689 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2024-10-24 16:20:52,689 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2024-10-24 16:20:52,689 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2024-10-24 16:20:52,775 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2024-10-24 16:20:52,776 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.yml [2024-10-24 16:20:52,776 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-10-24 16:20:52,777 INFO L158 Benchmark]: Toolchain (without parser) took 20390.09ms. Allocated memory was 157.3MB in the beginning and 188.7MB in the end (delta: 31.5MB). Free memory was 122.4MB in the beginning and 82.8MB in the end (delta: 39.6MB). Peak memory consumption was 71.1MB. Max. memory is 16.1GB. [2024-10-24 16:20:52,777 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 157.3MB. Free memory is still 126.7MB. There was no memory consumed. Max. memory is 16.1GB. [2024-10-24 16:20:52,777 INFO L158 Benchmark]: CACSL2BoogieTranslator took 261.48ms. Allocated memory is still 157.3MB. Free memory was 121.8MB in the beginning and 110.2MB in the end (delta: 11.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2024-10-24 16:20:52,777 INFO L158 Benchmark]: Boogie Procedure Inliner took 27.00ms. Allocated memory is still 157.3MB. Free memory was 110.2MB in the beginning and 108.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-10-24 16:20:52,778 INFO L158 Benchmark]: Boogie Preprocessor took 32.54ms. Allocated memory is still 157.3MB. Free memory was 108.6MB in the beginning and 106.5MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-10-24 16:20:52,778 INFO L158 Benchmark]: RCFGBuilder took 493.37ms. Allocated memory is still 157.3MB. Free memory was 106.5MB in the beginning and 118.5MB in the end (delta: -12.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-10-24 16:20:52,778 INFO L158 Benchmark]: TraceAbstraction took 19473.58ms. Allocated memory was 157.3MB in the beginning and 188.7MB in the end (delta: 31.5MB). Free memory was 117.5MB in the beginning and 87.6MB in the end (delta: 29.8MB). Peak memory consumption was 62.5MB. Max. memory is 16.1GB. [2024-10-24 16:20:52,778 INFO L158 Benchmark]: Witness Printer took 96.30ms. Allocated memory is still 188.7MB. Free memory was 87.6MB in the beginning and 82.8MB in the end (delta: 4.9MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-10-24 16:20:52,780 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 157.3MB. Free memory is still 126.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 261.48ms. Allocated memory is still 157.3MB. Free memory was 121.8MB in the beginning and 110.2MB in the end (delta: 11.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 27.00ms. Allocated memory is still 157.3MB. Free memory was 110.2MB in the beginning and 108.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 32.54ms. Allocated memory is still 157.3MB. Free memory was 108.6MB in the beginning and 106.5MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 493.37ms. Allocated memory is still 157.3MB. Free memory was 106.5MB in the beginning and 118.5MB in the end (delta: -12.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 19473.58ms. Allocated memory was 157.3MB in the beginning and 188.7MB in the end (delta: 31.5MB). Free memory was 117.5MB in the beginning and 87.6MB in the end (delta: 29.8MB). Peak memory consumption was 62.5MB. Max. memory is 16.1GB. * Witness Printer took 96.30ms. Allocated memory is still 188.7MB. Free memory was 87.6MB in the beginning and 82.8MB in the end (delta: 4.9MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 15]: array index is always in bounds For all program executions holds that array index is always in bounds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 20]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 22 locations, 8 error locations. Started 1 CEGAR loops. OverallTime: 19.4s, OverallIterations: 21, TraceHistogramMax: 27, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 5.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1286 SdHoareTripleChecker+Valid, 2.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1286 mSDsluCounter, 565 SdHoareTripleChecker+Invalid, 2.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 31 IncrementalHoareTripleChecker+Unchecked, 404 mSDsCounter, 258 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3620 IncrementalHoareTripleChecker+Invalid, 3909 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 258 mSolverCounterUnsat, 161 mSDtfsCounter, 3620 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1512 GetRequests, 1064 SyntacticMatches, 28 SemanticMatches, 420 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 3975 ImplicationChecksByTransitivity, 4.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=144occurred in iteration=20, InterpolantAutomatonStates: 285, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 21 MinimizatonAttempts, 207 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 8.3s InterpolantComputationTime, 1565 NumberOfCodeBlocks, 1251 NumberOfCodeBlocksAsserted, 43 NumberOfCheckSat, 1981 ConstructedInterpolants, 2 QuantifiedInterpolants, 11901 SizeOfPredicates, 44 NumberOfNonLiveVariables, 2613 ConjunctsInSsa, 228 ConjunctsInUnsatCore, 50 InterpolantComputations, 8 PerfectInterpolantSequences, 8023/10833 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 8 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-10-24 16:20:52,814 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE