./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/valid-memsafety.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/openbsd_cmemchr-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 84cfde4a Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/openbsd_cmemchr-alloca-2.i -s /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-clean/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 007fc8a389a67fb47c7d326d3f1d284696dfe5de13661e77d6d1bf7cce285194 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-11 17:46:46,987 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-11 17:46:47,045 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-11 17:46:47,049 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-11 17:46:47,050 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-11 17:46:47,074 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-11 17:46:47,075 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-11 17:46:47,075 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-11 17:46:47,075 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-11 17:46:47,075 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-11 17:46:47,076 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-11 17:46:47,076 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-11 17:46:47,076 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-11 17:46:47,076 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-11 17:46:47,077 INFO L153 SettingsManager]: * Use SBE=true [2024-10-11 17:46:47,077 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-11 17:46:47,077 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-11 17:46:47,077 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-11 17:46:47,077 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-11 17:46:47,078 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-11 17:46:47,078 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-11 17:46:47,080 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-11 17:46:47,081 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-11 17:46:47,081 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-11 17:46:47,081 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-11 17:46:47,081 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-11 17:46:47,081 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-11 17:46:47,082 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-11 17:46:47,082 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-11 17:46:47,082 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-11 17:46:47,082 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-11 17:46:47,082 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-11 17:46:47,082 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-11 17:46:47,083 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 17:46:47,083 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-11 17:46:47,083 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-11 17:46:47,083 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-11 17:46:47,083 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-11 17:46:47,083 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-11 17:46:47,084 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-11 17:46:47,084 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-11 17:46:47,086 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-11 17:46:47,087 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-clean/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 007fc8a389a67fb47c7d326d3f1d284696dfe5de13661e77d6d1bf7cce285194 [2024-10-11 17:46:47,279 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-11 17:46:47,299 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-11 17:46:47,301 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-11 17:46:47,302 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-11 17:46:47,302 INFO L274 PluginConnector]: CDTParser initialized [2024-10-11 17:46:47,303 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/openbsd_cmemchr-alloca-2.i [2024-10-11 17:46:48,561 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-11 17:46:48,750 INFO L384 CDTParser]: Found 1 translation units. [2024-10-11 17:46:48,750 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/openbsd_cmemchr-alloca-2.i [2024-10-11 17:46:48,759 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/c1b28a4f6/73171bb550774eefa0ad8d7a63514d57/FLAGbc75fa46d [2024-10-11 17:46:49,120 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/c1b28a4f6/73171bb550774eefa0ad8d7a63514d57 [2024-10-11 17:46:49,122 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-11 17:46:49,123 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-11 17:46:49,125 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-11 17:46:49,125 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-11 17:46:49,133 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-11 17:46:49,133 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 05:46:49" (1/1) ... [2024-10-11 17:46:49,134 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16f35558 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:46:49, skipping insertion in model container [2024-10-11 17:46:49,134 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 05:46:49" (1/1) ... [2024-10-11 17:46:49,157 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-11 17:46:49,410 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 17:46:49,419 INFO L200 MainTranslator]: Completed pre-run [2024-10-11 17:46:49,450 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 17:46:49,488 INFO L204 MainTranslator]: Completed translation [2024-10-11 17:46:49,488 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:46:49 WrapperNode [2024-10-11 17:46:49,488 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-11 17:46:49,489 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-11 17:46:49,489 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-11 17:46:49,489 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-11 17:46:49,494 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:46:49" (1/1) ... [2024-10-11 17:46:49,503 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:46:49" (1/1) ... [2024-10-11 17:46:49,517 INFO L138 Inliner]: procedures = 117, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 69 [2024-10-11 17:46:49,517 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-11 17:46:49,518 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-11 17:46:49,518 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-11 17:46:49,518 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-11 17:46:49,525 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:46:49" (1/1) ... [2024-10-11 17:46:49,525 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:46:49" (1/1) ... [2024-10-11 17:46:49,527 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:46:49" (1/1) ... [2024-10-11 17:46:49,537 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 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]. [2024-10-11 17:46:49,537 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:46:49" (1/1) ... [2024-10-11 17:46:49,538 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:46:49" (1/1) ... [2024-10-11 17:46:49,540 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:46:49" (1/1) ... [2024-10-11 17:46:49,543 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:46:49" (1/1) ... [2024-10-11 17:46:49,545 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:46:49" (1/1) ... [2024-10-11 17:46:49,545 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:46:49" (1/1) ... [2024-10-11 17:46:49,547 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-11 17:46:49,547 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-11 17:46:49,548 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-11 17:46:49,548 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-11 17:46:49,548 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:46:49" (1/1) ... [2024-10-11 17:46:49,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 17:46:49,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:46:49,572 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-11 17:46:49,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-11 17:46:49,616 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-11 17:46:49,617 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-11 17:46:49,617 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-11 17:46:49,617 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-11 17:46:49,617 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-11 17:46:49,617 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-11 17:46:49,709 INFO L238 CfgBuilder]: Building ICFG [2024-10-11 17:46:49,711 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-11 17:46:49,841 INFO L? ?]: Removed 36 outVars from TransFormulas that were not future-live. [2024-10-11 17:46:49,841 INFO L287 CfgBuilder]: Performing block encoding [2024-10-11 17:46:49,865 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-11 17:46:49,866 INFO L314 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-11 17:46:49,868 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 05:46:49 BoogieIcfgContainer [2024-10-11 17:46:49,868 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-11 17:46:49,869 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-11 17:46:49,869 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-11 17:46:49,872 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-11 17:46:49,872 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 05:46:49" (1/3) ... [2024-10-11 17:46:49,872 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5771eabc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 05:46:49, skipping insertion in model container [2024-10-11 17:46:49,872 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:46:49" (2/3) ... [2024-10-11 17:46:49,873 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5771eabc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 05:46:49, skipping insertion in model container [2024-10-11 17:46:49,873 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 05:46:49" (3/3) ... [2024-10-11 17:46:49,874 INFO L112 eAbstractionObserver]: Analyzing ICFG openbsd_cmemchr-alloca-2.i [2024-10-11 17:46:49,885 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-11 17:46:49,885 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2024-10-11 17:46:49,914 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 17:46:49,918 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;@60d00189, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 17:46:49,919 INFO L334 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-10-11 17:46:49,921 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 16 states have (on average 1.8125) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:46:49,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-10-11 17:46:49,927 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:46:49,927 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-11 17:46:49,928 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-10-11 17:46:49,931 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:46:49,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1369833435, now seen corresponding path program 1 times [2024-10-11 17:46:49,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:46:49,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988742091] [2024-10-11 17:46:49,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:46:49,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:46:50,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:46:50,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:46:50,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:46:50,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988742091] [2024-10-11 17:46:50,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988742091] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 17:46:50,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 17:46:50,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 17:46:50,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970972234] [2024-10-11 17:46:50,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 17:46:50,155 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 17:46:50,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:46:50,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 17:46:50,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 17:46:50,180 INFO L87 Difference]: Start difference. First operand has 22 states, 16 states have (on average 1.8125) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:46:50,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:46:50,242 INFO L93 Difference]: Finished difference Result 21 states and 26 transitions. [2024-10-11 17:46:50,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 17:46:50,247 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-10-11 17:46:50,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:46:50,252 INFO L225 Difference]: With dead ends: 21 [2024-10-11 17:46:50,252 INFO L226 Difference]: Without dead ends: 20 [2024-10-11 17:46:50,253 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 17:46:50,256 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 2 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 17:46:50,256 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 33 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 17:46:50,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2024-10-11 17:46:50,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2024-10-11 17:46:50,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 16 states have (on average 1.5625) internal successors, (25), 19 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) [2024-10-11 17:46:50,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2024-10-11 17:46:50,275 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 6 [2024-10-11 17:46:50,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:46:50,276 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2024-10-11 17:46:50,276 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:46:50,276 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2024-10-11 17:46:50,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-10-11 17:46:50,276 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:46:50,276 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-11 17:46:50,277 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-11 17:46:50,277 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-10-11 17:46:50,277 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:46:50,277 INFO L85 PathProgramCache]: Analyzing trace with hash -1369833434, now seen corresponding path program 1 times [2024-10-11 17:46:50,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:46:50,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191394876] [2024-10-11 17:46:50,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:46:50,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:46:50,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:46:50,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:46:50,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:46:50,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191394876] [2024-10-11 17:46:50,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191394876] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 17:46:50,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 17:46:50,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-11 17:46:50,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749254871] [2024-10-11 17:46:50,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 17:46:50,510 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 17:46:50,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:46:50,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 17:46:50,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-11 17:46:50,511 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:46:50,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:46:50,581 INFO L93 Difference]: Finished difference Result 27 states and 33 transitions. [2024-10-11 17:46:50,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 17:46:50,582 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-10-11 17:46:50,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:46:50,582 INFO L225 Difference]: With dead ends: 27 [2024-10-11 17:46:50,582 INFO L226 Difference]: Without dead ends: 27 [2024-10-11 17:46:50,583 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-10-11 17:46:50,583 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 8 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 17:46:50,584 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 65 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 17:46:50,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-10-11 17:46:50,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2024-10-11 17:46:50,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 22 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) [2024-10-11 17:46:50,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2024-10-11 17:46:50,587 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 6 [2024-10-11 17:46:50,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:46:50,587 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2024-10-11 17:46:50,587 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:46:50,587 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2024-10-11 17:46:50,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-10-11 17:46:50,588 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:46:50,588 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-11 17:46:50,588 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-11 17:46:50,588 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-10-11 17:46:50,589 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:46:50,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1369773852, now seen corresponding path program 1 times [2024-10-11 17:46:50,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:46:50,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236385322] [2024-10-11 17:46:50,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:46:50,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:46:50,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:46:50,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:46:50,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:46:50,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236385322] [2024-10-11 17:46:50,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236385322] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 17:46:50,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 17:46:50,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-11 17:46:50,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122999206] [2024-10-11 17:46:50,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 17:46:50,715 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-11 17:46:50,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:46:50,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-11 17:46:50,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-10-11 17:46:50,716 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:46:50,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:46:50,762 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2024-10-11 17:46:50,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 17:46:50,762 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-10-11 17:46:50,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:46:50,763 INFO L225 Difference]: With dead ends: 25 [2024-10-11 17:46:50,763 INFO L226 Difference]: Without dead ends: 25 [2024-10-11 17:46:50,763 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-10-11 17:46:50,764 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 14 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 17:46:50,766 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 57 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 17:46:50,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-10-11 17:46:50,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2024-10-11 17:46:50,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 18 states have (on average 1.5) internal successors, (27), 21 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) [2024-10-11 17:46:50,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2024-10-11 17:46:50,771 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 6 [2024-10-11 17:46:50,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:46:50,771 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2024-10-11 17:46:50,771 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:46:50,771 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2024-10-11 17:46:50,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-10-11 17:46:50,771 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:46:50,771 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-10-11 17:46:50,772 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-11 17:46:50,772 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-10-11 17:46:50,772 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:46:50,772 INFO L85 PathProgramCache]: Analyzing trace with hash 2145075704, now seen corresponding path program 1 times [2024-10-11 17:46:50,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:46:50,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745935144] [2024-10-11 17:46:50,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:46:50,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:46:50,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:46:50,852 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:46:50,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:46:50,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745935144] [2024-10-11 17:46:50,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745935144] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:46:50,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452711042] [2024-10-11 17:46:50,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:46:50,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:46:50,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:46:50,856 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:46:50,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-11 17:46:50,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:46:50,912 INFO L255 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-11 17:46:50,915 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:46:50,966 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:46:50,969 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 17:46:50,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452711042] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 17:46:50,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-11 17:46:50,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2024-10-11 17:46:50,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536951577] [2024-10-11 17:46:50,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 17:46:50,970 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 17:46:50,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:46:50,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 17:46:50,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-10-11 17:46:50,973 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:46:50,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:46:50,998 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2024-10-11 17:46:50,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 17:46:50,999 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-10-11 17:46:50,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:46:51,000 INFO L225 Difference]: With dead ends: 27 [2024-10-11 17:46:51,000 INFO L226 Difference]: Without dead ends: 27 [2024-10-11 17:46:51,000 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-10-11 17:46:51,001 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 1 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 17:46:51,001 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 34 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 17:46:51,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-10-11 17:46:51,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2024-10-11 17:46:51,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 25 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:46:51,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2024-10-11 17:46:51,004 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 8 [2024-10-11 17:46:51,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:46:51,004 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2024-10-11 17:46:51,004 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:46:51,004 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2024-10-11 17:46:51,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-10-11 17:46:51,005 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:46:51,005 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-10-11 17:46:51,019 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-11 17:46:51,209 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:46:51,210 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-10-11 17:46:51,210 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:46:51,210 INFO L85 PathProgramCache]: Analyzing trace with hash -2092633290, now seen corresponding path program 1 times [2024-10-11 17:46:51,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:46:51,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285982568] [2024-10-11 17:46:51,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:46:51,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:46:51,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:46:51,362 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:46:51,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:46:51,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285982568] [2024-10-11 17:46:51,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285982568] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:46:51,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965443804] [2024-10-11 17:46:51,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:46:51,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:46:51,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:46:51,368 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:46:51,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-11 17:46:51,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:46:51,413 INFO L255 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-11 17:46:51,414 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:46:51,458 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-10-11 17:46:51,564 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:46:51,565 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:46:51,707 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:46:51,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965443804] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:46:51,707 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:46:51,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2024-10-11 17:46:51,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405093183] [2024-10-11 17:46:51,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:46:51,708 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-11 17:46:51,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:46:51,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-11 17:46:51,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2024-10-11 17:46:51,709 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:46:51,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:46:51,817 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2024-10-11 17:46:51,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-11 17:46:51,817 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-10-11 17:46:51,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:46:51,818 INFO L225 Difference]: With dead ends: 25 [2024-10-11 17:46:51,818 INFO L226 Difference]: Without dead ends: 25 [2024-10-11 17:46:51,819 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2024-10-11 17:46:51,820 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 3 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 17:46:51,820 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 119 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 17:46:51,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-10-11 17:46:51,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2024-10-11 17:46:51,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 21 states have (on average 1.380952380952381) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:46:51,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2024-10-11 17:46:51,825 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 8 [2024-10-11 17:46:51,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:46:51,825 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2024-10-11 17:46:51,825 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:46:51,825 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2024-10-11 17:46:51,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-10-11 17:46:51,826 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:46:51,826 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:46:51,839 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-11 17:46:52,026 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:46:52,027 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-10-11 17:46:52,027 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:46:52,027 INFO L85 PathProgramCache]: Analyzing trace with hash -869701947, now seen corresponding path program 1 times [2024-10-11 17:46:52,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:46:52,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916648642] [2024-10-11 17:46:52,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:46:52,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:46:52,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:46:52,094 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:46:52,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:46:52,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916648642] [2024-10-11 17:46:52,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916648642] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 17:46:52,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 17:46:52,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-11 17:46:52,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248317745] [2024-10-11 17:46:52,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 17:46:52,095 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-11 17:46:52,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:46:52,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-11 17:46:52,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-10-11 17:46:52,095 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:46:52,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:46:52,135 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2024-10-11 17:46:52,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 17:46:52,136 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-10-11 17:46:52,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:46:52,136 INFO L225 Difference]: With dead ends: 25 [2024-10-11 17:46:52,136 INFO L226 Difference]: Without dead ends: 25 [2024-10-11 17:46:52,137 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-10-11 17:46:52,137 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 8 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 17:46:52,137 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 51 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 17:46:52,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-10-11 17:46:52,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2024-10-11 17:46:52,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 22 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) [2024-10-11 17:46:52,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2024-10-11 17:46:52,140 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 11 [2024-10-11 17:46:52,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:46:52,140 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2024-10-11 17:46:52,140 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:46:52,140 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2024-10-11 17:46:52,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-10-11 17:46:52,140 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:46:52,141 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:46:52,141 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-11 17:46:52,141 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-10-11 17:46:52,141 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:46:52,141 INFO L85 PathProgramCache]: Analyzing trace with hash -869701946, now seen corresponding path program 1 times [2024-10-11 17:46:52,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:46:52,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766637081] [2024-10-11 17:46:52,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:46:52,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:46:52,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:46:52,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:46:52,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:46:52,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766637081] [2024-10-11 17:46:52,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766637081] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:46:52,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86665793] [2024-10-11 17:46:52,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:46:52,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:46:52,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:46:52,322 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:46:52,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-11 17:46:52,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:46:52,377 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-10-11 17:46:52,379 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:46:52,463 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:46:52,463 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:46:52,494 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2024-10-11 17:46:52,505 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:46:52,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86665793] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:46:52,506 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:46:52,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2024-10-11 17:46:52,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630061292] [2024-10-11 17:46:52,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:46:52,507 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-11 17:46:52,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:46:52,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-11 17:46:52,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-10-11 17:46:52,507 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:46:52,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:46:52,595 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2024-10-11 17:46:52,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-11 17:46:52,595 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-10-11 17:46:52,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:46:52,596 INFO L225 Difference]: With dead ends: 28 [2024-10-11 17:46:52,596 INFO L226 Difference]: Without dead ends: 28 [2024-10-11 17:46:52,596 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-10-11 17:46:52,597 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 5 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 17:46:52,597 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 98 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 17:46:52,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-10-11 17:46:52,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2024-10-11 17:46:52,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:46:52,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2024-10-11 17:46:52,599 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 11 [2024-10-11 17:46:52,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:46:52,599 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2024-10-11 17:46:52,599 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:46:52,599 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2024-10-11 17:46:52,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-10-11 17:46:52,601 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:46:52,601 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:46:52,613 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-11 17:46:52,804 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:46:52,805 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-10-11 17:46:52,805 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:46:52,805 INFO L85 PathProgramCache]: Analyzing trace with hash -1190188923, now seen corresponding path program 1 times [2024-10-11 17:46:52,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:46:52,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148053031] [2024-10-11 17:46:52,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:46:52,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:46:52,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:46:52,850 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 17:46:52,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:46:52,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148053031] [2024-10-11 17:46:52,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148053031] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 17:46:52,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 17:46:52,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-11 17:46:52,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228542124] [2024-10-11 17:46:52,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 17:46:52,852 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 17:46:52,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:46:52,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 17:46:52,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 17:46:52,853 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:46:52,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:46:52,875 INFO L93 Difference]: Finished difference Result 31 states and 37 transitions. [2024-10-11 17:46:52,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 17:46:52,877 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-10-11 17:46:52,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:46:52,877 INFO L225 Difference]: With dead ends: 31 [2024-10-11 17:46:52,877 INFO L226 Difference]: Without dead ends: 31 [2024-10-11 17:46:52,878 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 17:46:52,878 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 4 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 17:46:52,878 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 43 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 17:46:52,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-10-11 17:46:52,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2024-10-11 17:46:52,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 25 states have (on average 1.28) internal successors, (32), 26 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) [2024-10-11 17:46:52,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2024-10-11 17:46:52,882 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 12 [2024-10-11 17:46:52,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:46:52,882 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2024-10-11 17:46:52,882 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:46:52,882 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2024-10-11 17:46:52,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-10-11 17:46:52,883 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:46:52,883 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:46:52,883 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-11 17:46:52,883 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-10-11 17:46:52,884 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:46:52,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1583215933, now seen corresponding path program 1 times [2024-10-11 17:46:52,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:46:52,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917395411] [2024-10-11 17:46:52,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:46:52,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:46:52,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:46:52,947 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 17:46:52,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:46:52,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917395411] [2024-10-11 17:46:52,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917395411] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 17:46:52,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 17:46:52,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-11 17:46:52,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986718650] [2024-10-11 17:46:52,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 17:46:52,948 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 17:46:52,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:46:52,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 17:46:52,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-11 17:46:52,949 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:46:52,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:46:52,967 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2024-10-11 17:46:52,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 17:46:52,968 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-10-11 17:46:52,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:46:52,969 INFO L225 Difference]: With dead ends: 29 [2024-10-11 17:46:52,969 INFO L226 Difference]: Without dead ends: 29 [2024-10-11 17:46:52,969 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-11 17:46:52,970 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 5 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 17:46:52,971 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 35 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 17:46:52,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-10-11 17:46:52,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 25. [2024-10-11 17:46:52,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:46:52,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2024-10-11 17:46:52,974 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 12 [2024-10-11 17:46:52,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:46:52,974 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2024-10-11 17:46:52,974 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:46:52,975 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2024-10-11 17:46:52,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-10-11 17:46:52,975 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:46:52,975 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:46:52,975 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-11 17:46:52,975 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-10-11 17:46:52,976 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:46:52,976 INFO L85 PathProgramCache]: Analyzing trace with hash -2047957108, now seen corresponding path program 1 times [2024-10-11 17:46:52,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:46:52,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761828338] [2024-10-11 17:46:52,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:46:52,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:46:52,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:46:53,031 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 17:46:53,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:46:53,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761828338] [2024-10-11 17:46:53,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761828338] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 17:46:53,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 17:46:53,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 17:46:53,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603033219] [2024-10-11 17:46:53,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 17:46:53,033 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 17:46:53,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:46:53,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 17:46:53,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 17:46:53,034 INFO L87 Difference]: Start difference. First operand 25 states and 29 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) [2024-10-11 17:46:53,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:46:53,043 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2024-10-11 17:46:53,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 17:46:53,044 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 14 [2024-10-11 17:46:53,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:46:53,044 INFO L225 Difference]: With dead ends: 24 [2024-10-11 17:46:53,044 INFO L226 Difference]: Without dead ends: 20 [2024-10-11 17:46:53,044 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 17:46:53,045 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 8 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 17:46:53,045 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 30 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 17:46:53,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2024-10-11 17:46:53,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2024-10-11 17:46:53,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 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) [2024-10-11 17:46:53,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2024-10-11 17:46:53,046 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 14 [2024-10-11 17:46:53,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:46:53,047 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2024-10-11 17:46:53,047 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) [2024-10-11 17:46:53,047 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2024-10-11 17:46:53,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-10-11 17:46:53,047 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:46:53,047 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:46:53,047 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-10-11 17:46:53,047 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-10-11 17:46:53,048 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:46:53,048 INFO L85 PathProgramCache]: Analyzing trace with hash 938662836, now seen corresponding path program 1 times [2024-10-11 17:46:53,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:46:53,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453405281] [2024-10-11 17:46:53,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:46:53,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:46:53,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:46:53,128 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 17:46:53,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:46:53,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453405281] [2024-10-11 17:46:53,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453405281] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 17:46:53,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 17:46:53,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-11 17:46:53,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687245126] [2024-10-11 17:46:53,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 17:46:53,129 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 17:46:53,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:46:53,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 17:46:53,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-11 17:46:53,131 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 5 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) [2024-10-11 17:46:53,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:46:53,153 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2024-10-11 17:46:53,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 17:46:53,153 INFO L78 Accepts]: Start accepts. Automaton has has 5 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 15 [2024-10-11 17:46:53,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:46:53,154 INFO L225 Difference]: With dead ends: 26 [2024-10-11 17:46:53,154 INFO L226 Difference]: Without dead ends: 16 [2024-10-11 17:46:53,154 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-11 17:46:53,154 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 17:46:53,155 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 29 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 17:46:53,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2024-10-11 17:46:53,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2024-10-11 17:46:53,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:46:53,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2024-10-11 17:46:53,156 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 15 [2024-10-11 17:46:53,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:46:53,156 INFO L471 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2024-10-11 17:46:53,156 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 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) [2024-10-11 17:46:53,156 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2024-10-11 17:46:53,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-10-11 17:46:53,156 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:46:53,156 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:46:53,156 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-10-11 17:46:53,156 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-10-11 17:46:53,157 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:46:53,157 INFO L85 PathProgramCache]: Analyzing trace with hash 351856822, now seen corresponding path program 1 times [2024-10-11 17:46:53,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:46:53,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808894403] [2024-10-11 17:46:53,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:46:53,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:46:53,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:46:53,246 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:46:53,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:46:53,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808894403] [2024-10-11 17:46:53,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808894403] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:46:53,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393477788] [2024-10-11 17:46:53,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:46:53,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:46:53,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:46:53,248 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:46:53,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-11 17:46:53,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:46:53,296 INFO L255 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-11 17:46:53,297 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:46:53,325 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:46:53,325 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:46:53,411 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:46:53,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393477788] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:46:53,411 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:46:53,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2024-10-11 17:46:53,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700950457] [2024-10-11 17:46:53,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:46:53,412 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-11 17:46:53,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:46:53,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-11 17:46:53,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2024-10-11 17:46:53,413 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:46:53,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:46:53,478 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2024-10-11 17:46:53,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-11 17:46:53,479 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2024-10-11 17:46:53,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:46:53,479 INFO L225 Difference]: With dead ends: 25 [2024-10-11 17:46:53,479 INFO L226 Difference]: Without dead ends: 19 [2024-10-11 17:46:53,480 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2024-10-11 17:46:53,480 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 9 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 17:46:53,480 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 63 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 17:46:53,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2024-10-11 17:46:53,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2024-10-11 17:46:53,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:46:53,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2024-10-11 17:46:53,482 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 15 [2024-10-11 17:46:53,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:46:53,482 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2024-10-11 17:46:53,482 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:46:53,482 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2024-10-11 17:46:53,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-10-11 17:46:53,482 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:46:53,483 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:46:53,495 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-11 17:46:53,686 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-10-11 17:46:53,687 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-10-11 17:46:53,687 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:46:53,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1161845412, now seen corresponding path program 2 times [2024-10-11 17:46:53,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:46:53,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802601849] [2024-10-11 17:46:53,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:46:53,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:46:53,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:46:53,894 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:46:53,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:46:53,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802601849] [2024-10-11 17:46:53,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802601849] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:46:53,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63634711] [2024-10-11 17:46:53,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 17:46:53,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:46:53,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:46:53,897 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:46:53,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-11 17:46:53,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 17:46:53,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 17:46:53,952 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-10-11 17:46:53,953 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:46:54,059 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:46:54,059 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:46:54,197 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2024-10-11 17:46:54,218 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:46:54,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63634711] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:46:54,219 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:46:54,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2024-10-11 17:46:54,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792445835] [2024-10-11 17:46:54,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:46:54,219 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-11 17:46:54,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:46:54,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-11 17:46:54,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2024-10-11 17:46:54,220 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 22 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:46:54,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:46:54,328 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2024-10-11 17:46:54,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-11 17:46:54,329 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2024-10-11 17:46:54,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:46:54,329 INFO L225 Difference]: With dead ends: 23 [2024-10-11 17:46:54,329 INFO L226 Difference]: Without dead ends: 23 [2024-10-11 17:46:54,329 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2024-10-11 17:46:54,330 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 1 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 17:46:54,330 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 45 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 17:46:54,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2024-10-11 17:46:54,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2024-10-11 17:46:54,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:46:54,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2024-10-11 17:46:54,331 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 17 [2024-10-11 17:46:54,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:46:54,331 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2024-10-11 17:46:54,331 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:46:54,331 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2024-10-11 17:46:54,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-10-11 17:46:54,332 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:46:54,332 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:46:54,357 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-11 17:46:54,532 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-10-11 17:46:54,533 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-10-11 17:46:54,533 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:46:54,533 INFO L85 PathProgramCache]: Analyzing trace with hash -1567575918, now seen corresponding path program 3 times [2024-10-11 17:46:54,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:46:54,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622010972] [2024-10-11 17:46:54,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:46:54,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:46:54,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:46:54,657 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:46:54,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:46:54,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622010972] [2024-10-11 17:46:54,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622010972] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:46:54,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503783265] [2024-10-11 17:46:54,658 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 17:46:54,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:46:54,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:46:54,659 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:46:54,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-11 17:46:54,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-11 17:46:54,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 17:46:54,715 INFO L255 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-11 17:46:54,716 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:46:54,748 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:46:54,748 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:46:54,873 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:46:54,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503783265] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:46:54,874 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:46:54,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2024-10-11 17:46:54,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928938176] [2024-10-11 17:46:54,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:46:54,874 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-11 17:46:54,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:46:54,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-11 17:46:54,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2024-10-11 17:46:54,875 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 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) [2024-10-11 17:46:54,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:46:54,955 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2024-10-11 17:46:54,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-11 17:46:54,956 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 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) Word has length 21 [2024-10-11 17:46:54,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:46:54,956 INFO L225 Difference]: With dead ends: 35 [2024-10-11 17:46:54,956 INFO L226 Difference]: Without dead ends: 25 [2024-10-11 17:46:54,956 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2024-10-11 17:46:54,957 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 2 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 17:46:54,957 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 106 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 17:46:54,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-10-11 17:46:54,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2024-10-11 17:46:54,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:46:54,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2024-10-11 17:46:54,958 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 21 [2024-10-11 17:46:54,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:46:54,958 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2024-10-11 17:46:54,958 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 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) [2024-10-11 17:46:54,958 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2024-10-11 17:46:54,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-10-11 17:46:54,959 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:46:54,959 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:46:54,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-10-11 17:46:55,162 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-10-11 17:46:55,162 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-10-11 17:46:55,162 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:46:55,162 INFO L85 PathProgramCache]: Analyzing trace with hash 264927232, now seen corresponding path program 4 times [2024-10-11 17:46:55,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:46:55,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163474455] [2024-10-11 17:46:55,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:46:55,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:46:55,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:46:55,450 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:46:55,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:46:55,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163474455] [2024-10-11 17:46:55,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163474455] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:46:55,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482318972] [2024-10-11 17:46:55,451 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-11 17:46:55,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:46:55,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:46:55,452 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:46:55,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-11 17:46:55,511 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-11 17:46:55,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 17:46:55,512 INFO L255 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-10-11 17:46:55,514 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:46:55,522 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 [2024-10-11 17:46:55,651 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:46:55,651 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:46:55,895 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:46:55,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482318972] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:46:55,896 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:46:55,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2024-10-11 17:46:55,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676163794] [2024-10-11 17:46:55,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:46:55,896 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-10-11 17:46:55,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:46:55,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-10-11 17:46:55,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2024-10-11 17:46:55,898 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 27 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:46:56,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:46:56,090 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2024-10-11 17:46:56,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-11 17:46:56,090 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2024-10-11 17:46:56,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:46:56,091 INFO L225 Difference]: With dead ends: 29 [2024-10-11 17:46:56,091 INFO L226 Difference]: Without dead ends: 29 [2024-10-11 17:46:56,091 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=130, Invalid=740, Unknown=0, NotChecked=0, Total=870 [2024-10-11 17:46:56,091 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 1 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 17:46:56,092 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 78 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 17:46:56,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-10-11 17:46:56,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2024-10-11 17:46:56,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 27 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:46:56,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2024-10-11 17:46:56,097 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 23 [2024-10-11 17:46:56,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:46:56,097 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2024-10-11 17:46:56,097 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:46:56,097 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2024-10-11 17:46:56,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-10-11 17:46:56,098 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:46:56,098 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:46:56,112 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-11 17:46:56,298 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:46:56,299 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-10-11 17:46:56,299 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:46:56,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1244348434, now seen corresponding path program 5 times [2024-10-11 17:46:56,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:46:56,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241471018] [2024-10-11 17:46:56,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:46:56,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:46:56,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:46:56,462 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:46:56,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:46:56,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241471018] [2024-10-11 17:46:56,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241471018] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:46:56,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306581501] [2024-10-11 17:46:56,463 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-11 17:46:56,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:46:56,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:46:56,464 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:46:56,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-11 17:46:56,535 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-10-11 17:46:56,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 17:46:56,536 INFO L255 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-10-11 17:46:56,539 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:46:56,580 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:46:56,580 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:46:56,755 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:46:56,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306581501] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:46:56,756 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:46:56,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2024-10-11 17:46:56,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140013834] [2024-10-11 17:46:56,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:46:56,756 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-11 17:46:56,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:46:56,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-11 17:46:56,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2024-10-11 17:46:56,758 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 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) [2024-10-11 17:46:56,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:46:56,880 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2024-10-11 17:46:56,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-11 17:46:56,881 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 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 27 [2024-10-11 17:46:56,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:46:56,881 INFO L225 Difference]: With dead ends: 45 [2024-10-11 17:46:56,881 INFO L226 Difference]: Without dead ends: 31 [2024-10-11 17:46:56,882 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2024-10-11 17:46:56,882 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 2 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 17:46:56,882 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 175 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 17:46:56,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-10-11 17:46:56,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2024-10-11 17:46:56,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.103448275862069) internal successors, (32), 29 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) [2024-10-11 17:46:56,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2024-10-11 17:46:56,885 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 27 [2024-10-11 17:46:56,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:46:56,885 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2024-10-11 17:46:56,885 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 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) [2024-10-11 17:46:56,885 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2024-10-11 17:46:56,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-10-11 17:46:56,886 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:46:56,886 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:46:56,898 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-10-11 17:46:57,089 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-10-11 17:46:57,090 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-10-11 17:46:57,090 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:46:57,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1196080348, now seen corresponding path program 6 times [2024-10-11 17:46:57,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:46:57,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128743815] [2024-10-11 17:46:57,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:46:57,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:46:57,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:46:57,382 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:46:57,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:46:57,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128743815] [2024-10-11 17:46:57,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128743815] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:46:57,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194218802] [2024-10-11 17:46:57,383 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-11 17:46:57,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:46:57,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:46:57,385 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:46:57,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-11 17:46:57,532 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-10-11 17:46:57,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 17:46:57,533 INFO L255 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-10-11 17:46:57,535 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:46:57,709 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:46:57,709 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:46:57,869 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-10-11 17:46:57,960 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:46:57,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194218802] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:46:57,961 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:46:57,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 31 [2024-10-11 17:46:57,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925174698] [2024-10-11 17:46:57,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:46:57,962 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-10-11 17:46:57,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:46:57,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-10-11 17:46:57,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=860, Unknown=0, NotChecked=0, Total=992 [2024-10-11 17:46:57,963 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 32 states, 31 states have (on average 2.225806451612903) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:46:58,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:46:58,141 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2024-10-11 17:46:58,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-11 17:46:58,142 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.225806451612903) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2024-10-11 17:46:58,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:46:58,142 INFO L225 Difference]: With dead ends: 35 [2024-10-11 17:46:58,142 INFO L226 Difference]: Without dead ends: 35 [2024-10-11 17:46:58,143 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=167, Invalid=1093, Unknown=0, NotChecked=0, Total=1260 [2024-10-11 17:46:58,143 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 1 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 17:46:58,143 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 86 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 17:46:58,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-10-11 17:46:58,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2024-10-11 17:46:58,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 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) [2024-10-11 17:46:58,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2024-10-11 17:46:58,145 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 29 [2024-10-11 17:46:58,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:46:58,145 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2024-10-11 17:46:58,149 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.225806451612903) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:46:58,149 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2024-10-11 17:46:58,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-10-11 17:46:58,149 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:46:58,149 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:46:58,163 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-11 17:46:58,350 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-10-11 17:46:58,350 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-10-11 17:46:58,350 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:46:58,351 INFO L85 PathProgramCache]: Analyzing trace with hash -139512118, now seen corresponding path program 7 times [2024-10-11 17:46:58,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:46:58,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315624476] [2024-10-11 17:46:58,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:46:58,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:46:58,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:46:58,519 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 8 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:46:58,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:46:58,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315624476] [2024-10-11 17:46:58,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315624476] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:46:58,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789018288] [2024-10-11 17:46:58,520 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-11 17:46:58,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:46:58,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:46:58,521 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:46:58,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-11 17:46:58,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:46:58,602 INFO L255 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-10-11 17:46:58,603 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:46:58,653 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 8 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:46:58,653 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:46:58,894 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 8 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:46:58,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789018288] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:46:58,894 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:46:58,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 28 [2024-10-11 17:46:58,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474191925] [2024-10-11 17:46:58,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:46:58,895 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-10-11 17:46:58,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:46:58,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-10-11 17:46:58,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2024-10-11 17:46:58,896 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 28 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) [2024-10-11 17:46:59,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:46:59,036 INFO L93 Difference]: Finished difference Result 55 states and 57 transitions. [2024-10-11 17:46:59,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-11 17:46:59,037 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 28 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) Word has length 33 [2024-10-11 17:46:59,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:46:59,037 INFO L225 Difference]: With dead ends: 55 [2024-10-11 17:46:59,037 INFO L226 Difference]: Without dead ends: 37 [2024-10-11 17:46:59,038 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=95, Invalid=835, Unknown=0, NotChecked=0, Total=930 [2024-10-11 17:46:59,038 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 1 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 17:46:59,038 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 231 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 17:46:59,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-10-11 17:46:59,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2024-10-11 17:46:59,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 35 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) [2024-10-11 17:46:59,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2024-10-11 17:46:59,040 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 33 [2024-10-11 17:46:59,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:46:59,040 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2024-10-11 17:46:59,040 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 28 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) [2024-10-11 17:46:59,040 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2024-10-11 17:46:59,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-10-11 17:46:59,041 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:46:59,041 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:46:59,053 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-10-11 17:46:59,245 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-10-11 17:46:59,246 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-10-11 17:46:59,246 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:46:59,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1379710664, now seen corresponding path program 8 times [2024-10-11 17:46:59,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:46:59,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015785677] [2024-10-11 17:46:59,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:46:59,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:46:59,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:46:59,646 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 12 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:46:59,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:46:59,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015785677] [2024-10-11 17:46:59,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015785677] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:46:59,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378143690] [2024-10-11 17:46:59,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 17:46:59,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:46:59,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:46:59,648 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:46:59,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-11 17:46:59,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 17:46:59,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 17:46:59,715 INFO L255 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 54 conjuncts are in the unsatisfiable core [2024-10-11 17:46:59,719 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:46:59,888 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 20 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:46:59,888 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:47:00,124 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2024-10-11 17:47:00,193 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 20 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:47:00,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378143690] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:47:00,193 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:47:00,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2024-10-11 17:47:00,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436421874] [2024-10-11 17:47:00,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:47:00,193 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-10-11 17:47:00,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:47:00,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-10-11 17:47:00,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2024-10-11 17:47:00,194 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 34 states, 33 states have (on average 2.212121212121212) internal successors, (73), 34 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) [2024-10-11 17:47:00,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:47:00,464 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2024-10-11 17:47:00,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-10-11 17:47:00,464 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.212121212121212) internal successors, (73), 34 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 35 [2024-10-11 17:47:00,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:47:00,465 INFO L225 Difference]: With dead ends: 41 [2024-10-11 17:47:00,465 INFO L226 Difference]: Without dead ends: 41 [2024-10-11 17:47:00,465 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 46 SyntacticMatches, 5 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=173, Invalid=1309, Unknown=0, NotChecked=0, Total=1482 [2024-10-11 17:47:00,465 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 3 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-11 17:47:00,466 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 121 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 497 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-11 17:47:00,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-10-11 17:47:00,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2024-10-11 17:47:00,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 39 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) [2024-10-11 17:47:00,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2024-10-11 17:47:00,467 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 35 [2024-10-11 17:47:00,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:47:00,468 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2024-10-11 17:47:00,468 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.212121212121212) internal successors, (73), 34 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) [2024-10-11 17:47:00,468 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2024-10-11 17:47:00,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-10-11 17:47:00,468 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:47:00,468 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:47:00,481 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-10-11 17:47:00,669 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:47:00,669 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-10-11 17:47:00,669 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:47:00,669 INFO L85 PathProgramCache]: Analyzing trace with hash 470955302, now seen corresponding path program 9 times [2024-10-11 17:47:00,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:47:00,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611450995] [2024-10-11 17:47:00,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:47:00,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:47:00,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:47:00,886 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 10 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:47:00,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:47:00,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611450995] [2024-10-11 17:47:00,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611450995] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:47:00,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963174187] [2024-10-11 17:47:00,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 17:47:00,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:47:00,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:47:00,888 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:47:00,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-11 17:47:00,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-10-11 17:47:00,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 17:47:00,958 INFO L255 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-10-11 17:47:00,960 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:47:01,007 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 10 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:47:01,007 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:47:01,286 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 10 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:47:01,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963174187] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:47:01,287 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:47:01,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 32 [2024-10-11 17:47:01,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675527395] [2024-10-11 17:47:01,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:47:01,287 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-10-11 17:47:01,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:47:01,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-10-11 17:47:01,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2024-10-11 17:47:01,288 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 32 states, 32 states have (on average 2.40625) internal successors, (77), 32 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:01,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:47:01,529 INFO L93 Difference]: Finished difference Result 65 states and 67 transitions. [2024-10-11 17:47:01,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-11 17:47:01,529 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.40625) internal successors, (77), 32 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2024-10-11 17:47:01,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:47:01,529 INFO L225 Difference]: With dead ends: 65 [2024-10-11 17:47:01,529 INFO L226 Difference]: Without dead ends: 43 [2024-10-11 17:47:01,530 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=110, Invalid=1150, Unknown=0, NotChecked=0, Total=1260 [2024-10-11 17:47:01,530 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 1 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-11 17:47:01,530 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 398 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 453 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-11 17:47:01,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-10-11 17:47:01,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2024-10-11 17:47:01,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 41 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:01,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2024-10-11 17:47:01,534 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 39 [2024-10-11 17:47:01,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:47:01,534 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2024-10-11 17:47:01,534 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.40625) internal successors, (77), 32 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:01,534 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2024-10-11 17:47:01,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-10-11 17:47:01,534 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:47:01,534 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:47:01,547 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-10-11 17:47:01,735 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:47:01,735 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-10-11 17:47:01,735 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:47:01,736 INFO L85 PathProgramCache]: Analyzing trace with hash -566346476, now seen corresponding path program 10 times [2024-10-11 17:47:01,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:47:01,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062922865] [2024-10-11 17:47:01,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:47:01,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:47:01,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:47:02,156 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 20 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:47:02,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:47:02,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062922865] [2024-10-11 17:47:02,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062922865] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:47:02,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754781892] [2024-10-11 17:47:02,157 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-11 17:47:02,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:47:02,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:47:02,159 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:47:02,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-11 17:47:02,235 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-11 17:47:02,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 17:47:02,237 INFO L255 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 69 conjuncts are in the unsatisfiable core [2024-10-11 17:47:02,239 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:47:02,249 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 [2024-10-11 17:47:02,454 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 30 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:47:02,454 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:47:02,872 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 36 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:47:02,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754781892] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:47:02,874 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:47:02,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 41 [2024-10-11 17:47:02,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965057810] [2024-10-11 17:47:02,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:47:02,874 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-10-11 17:47:02,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:47:02,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-10-11 17:47:02,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=1479, Unknown=0, NotChecked=0, Total=1722 [2024-10-11 17:47:02,875 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand has 42 states, 41 states have (on average 2.3658536585365852) internal successors, (97), 42 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:03,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:47:03,187 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2024-10-11 17:47:03,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-10-11 17:47:03,188 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 2.3658536585365852) internal successors, (97), 42 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2024-10-11 17:47:03,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:47:03,189 INFO L225 Difference]: With dead ends: 47 [2024-10-11 17:47:03,189 INFO L226 Difference]: Without dead ends: 47 [2024-10-11 17:47:03,189 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 573 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=301, Invalid=1955, Unknown=0, NotChecked=0, Total=2256 [2024-10-11 17:47:03,190 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 3 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-11 17:47:03,190 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 142 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 608 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-11 17:47:03,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-10-11 17:47:03,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2024-10-11 17:47:03,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.0666666666666667) internal successors, (48), 45 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:03,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2024-10-11 17:47:03,191 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 41 [2024-10-11 17:47:03,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:47:03,192 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2024-10-11 17:47:03,192 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 2.3658536585365852) internal successors, (97), 42 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:03,192 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2024-10-11 17:47:03,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-10-11 17:47:03,195 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:47:03,195 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:47:03,208 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-10-11 17:47:03,395 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,14 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:47:03,396 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-10-11 17:47:03,396 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:47:03,396 INFO L85 PathProgramCache]: Analyzing trace with hash -336078078, now seen corresponding path program 11 times [2024-10-11 17:47:03,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:47:03,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265939121] [2024-10-11 17:47:03,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:47:03,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:47:03,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:47:03,647 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 12 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:47:03,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:47:03,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265939121] [2024-10-11 17:47:03,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265939121] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:47:03,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537322796] [2024-10-11 17:47:03,648 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-11 17:47:03,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:47:03,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:47:03,650 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:47:03,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-11 17:47:03,747 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-10-11 17:47:03,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 17:47:03,749 INFO L255 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-10-11 17:47:03,750 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:47:03,809 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 12 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:47:03,809 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:47:04,117 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 12 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:47:04,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537322796] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:47:04,117 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:47:04,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 36 [2024-10-11 17:47:04,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128165702] [2024-10-11 17:47:04,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:47:04,118 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-10-11 17:47:04,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:47:04,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-10-11 17:47:04,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1160, Unknown=0, NotChecked=0, Total=1260 [2024-10-11 17:47:04,118 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 36 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:04,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:47:04,357 INFO L93 Difference]: Finished difference Result 75 states and 77 transitions. [2024-10-11 17:47:04,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-10-11 17:47:04,357 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 36 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2024-10-11 17:47:04,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:47:04,358 INFO L225 Difference]: With dead ends: 75 [2024-10-11 17:47:04,358 INFO L226 Difference]: Without dead ends: 49 [2024-10-11 17:47:04,359 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=125, Invalid=1515, Unknown=0, NotChecked=0, Total=1640 [2024-10-11 17:47:04,361 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 2 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-11 17:47:04,362 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 405 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 476 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-11 17:47:04,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-10-11 17:47:04,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2024-10-11 17:47:04,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 47 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:04,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2024-10-11 17:47:04,363 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 45 [2024-10-11 17:47:04,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:47:04,363 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2024-10-11 17:47:04,363 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 36 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:04,363 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2024-10-11 17:47:04,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-10-11 17:47:04,364 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:47:04,364 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:47:04,377 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-10-11 17:47:04,564 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-10-11 17:47:04,564 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-10-11 17:47:04,564 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:47:04,565 INFO L85 PathProgramCache]: Analyzing trace with hash -691160976, now seen corresponding path program 12 times [2024-10-11 17:47:04,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:47:04,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753475456] [2024-10-11 17:47:04,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:47:04,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:47:04,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:47:05,049 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 30 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:47:05,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:47:05,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753475456] [2024-10-11 17:47:05,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753475456] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:47:05,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717955412] [2024-10-11 17:47:05,050 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-11 17:47:05,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:47:05,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:47:05,052 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:47:05,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-10-11 17:47:05,170 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2024-10-11 17:47:05,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 17:47:05,172 INFO L255 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 63 conjuncts are in the unsatisfiable core [2024-10-11 17:47:05,173 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:47:05,180 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 [2024-10-11 17:47:05,548 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 42 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:47:05,549 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:47:06,031 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 42 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:47:06,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717955412] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:47:06,031 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:47:06,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 55 [2024-10-11 17:47:06,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169561137] [2024-10-11 17:47:06,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:47:06,032 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2024-10-11 17:47:06,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:47:06,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2024-10-11 17:47:06,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=390, Invalid=2690, Unknown=0, NotChecked=0, Total=3080 [2024-10-11 17:47:06,033 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand has 56 states, 55 states have (on average 2.4545454545454546) internal successors, (135), 56 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:06,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:47:06,347 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2024-10-11 17:47:06,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-10-11 17:47:06,348 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 2.4545454545454546) internal successors, (135), 56 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2024-10-11 17:47:06,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:47:06,348 INFO L225 Difference]: With dead ends: 53 [2024-10-11 17:47:06,348 INFO L226 Difference]: Without dead ends: 53 [2024-10-11 17:47:06,349 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1168 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=499, Invalid=3407, Unknown=0, NotChecked=0, Total=3906 [2024-10-11 17:47:06,349 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 3 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 638 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-11 17:47:06,350 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 163 Invalid, 638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 638 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-11 17:47:06,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-10-11 17:47:06,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2024-10-11 17:47:06,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.0588235294117647) internal successors, (54), 51 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) [2024-10-11 17:47:06,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2024-10-11 17:47:06,351 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 47 [2024-10-11 17:47:06,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:47:06,351 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2024-10-11 17:47:06,351 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 2.4545454545454546) internal successors, (135), 56 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:06,351 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2024-10-11 17:47:06,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-10-11 17:47:06,352 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:47:06,352 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:47:06,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-10-11 17:47:06,552 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:47:06,552 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-10-11 17:47:06,553 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:47:06,553 INFO L85 PathProgramCache]: Analyzing trace with hash -815642530, now seen corresponding path program 13 times [2024-10-11 17:47:06,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:47:06,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297541570] [2024-10-11 17:47:06,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:47:06,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:47:06,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:47:06,850 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 14 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:47:06,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:47:06,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297541570] [2024-10-11 17:47:06,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297541570] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:47:06,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273965750] [2024-10-11 17:47:06,851 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-11 17:47:06,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:47:06,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:47:06,852 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:47:06,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-10-11 17:47:06,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:47:06,936 INFO L255 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-10-11 17:47:06,937 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:47:07,008 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 14 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:47:07,009 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:47:07,468 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 14 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:47:07,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273965750] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:47:07,468 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:47:07,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 40 [2024-10-11 17:47:07,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911975109] [2024-10-11 17:47:07,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:47:07,469 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-10-11 17:47:07,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:47:07,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-10-11 17:47:07,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1450, Unknown=0, NotChecked=0, Total=1560 [2024-10-11 17:47:07,470 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand has 40 states, 40 states have (on average 2.525) internal successors, (101), 40 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:07,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:47:07,835 INFO L93 Difference]: Finished difference Result 85 states and 87 transitions. [2024-10-11 17:47:07,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-10-11 17:47:07,835 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.525) internal successors, (101), 40 states have internal predecessors, (101), 0 states have call successors, (0), 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 51 [2024-10-11 17:47:07,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:47:07,836 INFO L225 Difference]: With dead ends: 85 [2024-10-11 17:47:07,836 INFO L226 Difference]: Without dead ends: 55 [2024-10-11 17:47:07,836 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=140, Invalid=1930, Unknown=0, NotChecked=0, Total=2070 [2024-10-11 17:47:07,837 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 2 mSDsluCounter, 660 mSDsCounter, 0 mSdLazyCounter, 785 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 685 SdHoareTripleChecker+Invalid, 792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-11 17:47:07,837 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 685 Invalid, 792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 785 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-11 17:47:07,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-10-11 17:47:07,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2024-10-11 17:47:07,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.0566037735849056) internal successors, (56), 53 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:07,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2024-10-11 17:47:07,838 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 51 [2024-10-11 17:47:07,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:47:07,838 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2024-10-11 17:47:07,838 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.525) internal successors, (101), 40 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:07,838 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2024-10-11 17:47:07,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-10-11 17:47:07,839 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:47:07,839 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:47:07,854 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-10-11 17:47:08,045 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-10-11 17:47:08,046 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-10-11 17:47:08,046 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:47:08,046 INFO L85 PathProgramCache]: Analyzing trace with hash 42720076, now seen corresponding path program 14 times [2024-10-11 17:47:08,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:47:08,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948270966] [2024-10-11 17:47:08,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:47:08,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:47:08,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:47:08,612 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 42 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:47:08,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:47:08,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948270966] [2024-10-11 17:47:08,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948270966] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:47:08,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050993386] [2024-10-11 17:47:08,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 17:47:08,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:47:08,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:47:08,614 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:47:08,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-10-11 17:47:08,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 17:47:08,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 17:47:08,692 INFO L255 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 81 conjuncts are in the unsatisfiable core [2024-10-11 17:47:08,693 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:47:08,929 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 56 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:47:08,930 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:47:09,240 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2024-10-11 17:47:09,373 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 56 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:47:09,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050993386] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:47:09,373 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:47:09,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 45 [2024-10-11 17:47:09,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700215220] [2024-10-11 17:47:09,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:47:09,374 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-10-11 17:47:09,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:47:09,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-10-11 17:47:09,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=1838, Unknown=0, NotChecked=0, Total=2070 [2024-10-11 17:47:09,375 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand has 46 states, 45 states have (on average 2.422222222222222) internal successors, (109), 46 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:09,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:47:09,750 INFO L93 Difference]: Finished difference Result 59 states and 61 transitions. [2024-10-11 17:47:09,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-10-11 17:47:09,751 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 2.422222222222222) internal successors, (109), 46 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2024-10-11 17:47:09,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:47:09,751 INFO L225 Difference]: With dead ends: 59 [2024-10-11 17:47:09,751 INFO L226 Difference]: Without dead ends: 59 [2024-10-11 17:47:09,752 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 73 SyntacticMatches, 8 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1008 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=311, Invalid=2551, Unknown=0, NotChecked=0, Total=2862 [2024-10-11 17:47:09,752 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 1 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 833 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 833 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-11 17:47:09,752 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 189 Invalid, 833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 833 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-11 17:47:09,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-10-11 17:47:09,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2024-10-11 17:47:09,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.0526315789473684) internal successors, (60), 57 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:09,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2024-10-11 17:47:09,754 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 53 [2024-10-11 17:47:09,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:47:09,754 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2024-10-11 17:47:09,754 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 2.422222222222222) internal successors, (109), 46 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:09,754 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2024-10-11 17:47:09,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-10-11 17:47:09,755 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:47:09,755 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:47:09,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-10-11 17:47:09,955 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,18 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:47:09,955 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-10-11 17:47:09,955 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:47:09,956 INFO L85 PathProgramCache]: Analyzing trace with hash -681861830, now seen corresponding path program 15 times [2024-10-11 17:47:09,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:47:09,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59483599] [2024-10-11 17:47:09,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:47:09,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:47:09,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:47:10,275 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 16 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:47:10,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:47:10,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59483599] [2024-10-11 17:47:10,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59483599] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:47:10,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727835874] [2024-10-11 17:47:10,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 17:47:10,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:47:10,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:47:10,278 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:47:10,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-10-11 17:47:10,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2024-10-11 17:47:10,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 17:47:10,402 INFO L255 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 111 conjuncts are in the unsatisfiable core [2024-10-11 17:47:10,405 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:47:10,413 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-10-11 17:47:11,648 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:47:11,648 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:47:13,417 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 64 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:47:13,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727835874] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:47:13,417 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:47:13,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 31, 31] total 82 [2024-10-11 17:47:13,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989361719] [2024-10-11 17:47:13,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:47:13,418 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2024-10-11 17:47:13,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:47:13,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2024-10-11 17:47:13,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=448, Invalid=6194, Unknown=0, NotChecked=0, Total=6642 [2024-10-11 17:47:13,420 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand has 82 states, 82 states have (on average 2.0121951219512195) internal successors, (165), 82 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:15,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:47:15,843 INFO L93 Difference]: Finished difference Result 99 states and 101 transitions. [2024-10-11 17:47:15,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2024-10-11 17:47:15,843 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.0121951219512195) internal successors, (165), 82 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2024-10-11 17:47:15,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:47:15,844 INFO L225 Difference]: With dead ends: 99 [2024-10-11 17:47:15,844 INFO L226 Difference]: Without dead ends: 65 [2024-10-11 17:47:15,847 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3156 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1249, Invalid=16307, Unknown=0, NotChecked=0, Total=17556 [2024-10-11 17:47:15,847 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 43 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 1810 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 1841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1810 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-11 17:47:15,847 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 327 Invalid, 1841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1810 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-11 17:47:15,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-10-11 17:47:15,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2024-10-11 17:47:15,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.0476190476190477) internal successors, (66), 63 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:15,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2024-10-11 17:47:15,849 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 57 [2024-10-11 17:47:15,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:47:15,849 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2024-10-11 17:47:15,849 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 2.0121951219512195) internal successors, (165), 82 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:15,849 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2024-10-11 17:47:15,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-10-11 17:47:15,850 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:47:15,850 INFO L215 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:47:15,863 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-10-11 17:47:16,054 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-10-11 17:47:16,055 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-10-11 17:47:16,055 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:47:16,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1207302550, now seen corresponding path program 16 times [2024-10-11 17:47:16,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:47:16,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703771831] [2024-10-11 17:47:16,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:47:16,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:47:16,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:47:16,418 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 18 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:47:16,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:47:16,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703771831] [2024-10-11 17:47:16,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703771831] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:47:16,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732401160] [2024-10-11 17:47:16,419 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-11 17:47:16,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:47:16,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:47:16,420 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:47:16,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-10-11 17:47:16,535 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-11 17:47:16,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 17:47:16,536 INFO L255 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-10-11 17:47:16,538 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:47:16,619 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 18 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:47:16,619 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:47:17,158 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 18 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:47:17,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732401160] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:47:17,158 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:47:17,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 49 [2024-10-11 17:47:17,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248748312] [2024-10-11 17:47:17,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:47:17,159 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-10-11 17:47:17,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:47:17,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-10-11 17:47:17,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=2218, Unknown=0, NotChecked=0, Total=2352 [2024-10-11 17:47:17,160 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand has 49 states, 49 states have (on average 2.5714285714285716) internal successors, (126), 49 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) [2024-10-11 17:47:17,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:47:17,649 INFO L93 Difference]: Finished difference Result 105 states and 107 transitions. [2024-10-11 17:47:17,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-10-11 17:47:17,650 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.5714285714285716) internal successors, (126), 49 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2024-10-11 17:47:17,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:47:17,650 INFO L225 Difference]: With dead ends: 105 [2024-10-11 17:47:17,650 INFO L226 Difference]: Without dead ends: 67 [2024-10-11 17:47:17,651 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=174, Invalid=3018, Unknown=0, NotChecked=0, Total=3192 [2024-10-11 17:47:17,651 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 2 mSDsluCounter, 950 mSDsCounter, 0 mSdLazyCounter, 1140 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 981 SdHoareTripleChecker+Invalid, 1149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-11 17:47:17,651 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 981 Invalid, 1149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1140 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-11 17:47:17,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-10-11 17:47:17,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2024-10-11 17:47:17,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.0461538461538462) internal successors, (68), 65 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:17,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2024-10-11 17:47:17,652 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 63 [2024-10-11 17:47:17,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:47:17,652 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2024-10-11 17:47:17,652 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.5714285714285716) internal successors, (126), 49 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) [2024-10-11 17:47:17,653 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2024-10-11 17:47:17,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-10-11 17:47:17,653 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:47:17,653 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:47:17,666 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-10-11 17:47:17,853 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,20 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:47:17,854 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-10-11 17:47:17,854 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:47:17,854 INFO L85 PathProgramCache]: Analyzing trace with hash 2099550084, now seen corresponding path program 17 times [2024-10-11 17:47:17,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:47:17,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100116488] [2024-10-11 17:47:17,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:47:17,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:47:17,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:47:18,529 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 72 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:47:18,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:47:18,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100116488] [2024-10-11 17:47:18,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100116488] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:47:18,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813742744] [2024-10-11 17:47:18,529 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-11 17:47:18,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:47:18,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:47:18,530 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:47:18,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-10-11 17:47:18,643 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2024-10-11 17:47:18,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 17:47:18,645 INFO L255 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 105 conjuncts are in the unsatisfiable core [2024-10-11 17:47:18,647 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:47:18,651 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 [2024-10-11 17:47:18,999 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 90 proven. 172 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:47:18,999 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:47:19,702 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 100 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:47:19,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813742744] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:47:19,703 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:47:19,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 61 [2024-10-11 17:47:19,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119273679] [2024-10-11 17:47:19,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:47:19,703 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2024-10-11 17:47:19,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:47:19,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2024-10-11 17:47:19,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=525, Invalid=3257, Unknown=0, NotChecked=0, Total=3782 [2024-10-11 17:47:19,704 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand has 62 states, 61 states have (on average 2.5081967213114753) internal successors, (153), 62 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:20,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:47:20,271 INFO L93 Difference]: Finished difference Result 71 states and 73 transitions. [2024-10-11 17:47:20,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-10-11 17:47:20,272 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 61 states have (on average 2.5081967213114753) internal successors, (153), 62 states have internal predecessors, (153), 0 states have call successors, (0), 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 65 [2024-10-11 17:47:20,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:47:20,273 INFO L225 Difference]: With dead ends: 71 [2024-10-11 17:47:20,273 INFO L226 Difference]: Without dead ends: 71 [2024-10-11 17:47:20,273 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1499 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=641, Invalid=4471, Unknown=0, NotChecked=0, Total=5112 [2024-10-11 17:47:20,273 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 3 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 1206 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 1206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-11 17:47:20,273 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 271 Invalid, 1206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1206 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-11 17:47:20,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-10-11 17:47:20,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2024-10-11 17:47:20,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.0434782608695652) internal successors, (72), 69 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:20,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2024-10-11 17:47:20,275 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 65 [2024-10-11 17:47:20,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:47:20,275 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2024-10-11 17:47:20,275 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 61 states have (on average 2.5081967213114753) internal successors, (153), 62 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:20,275 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2024-10-11 17:47:20,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-10-11 17:47:20,275 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:47:20,276 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:47:20,288 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-10-11 17:47:20,476 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-10-11 17:47:20,476 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-10-11 17:47:20,477 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:47:20,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1572110990, now seen corresponding path program 18 times [2024-10-11 17:47:20,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:47:20,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339486959] [2024-10-11 17:47:20,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:47:20,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:47:20,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:47:20,859 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 20 proven. 280 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:47:20,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:47:20,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339486959] [2024-10-11 17:47:20,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339486959] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:47:20,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143028234] [2024-10-11 17:47:20,859 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-11 17:47:20,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:47:20,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:47:20,860 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:47:20,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-10-11 17:47:21,005 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2024-10-11 17:47:21,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 17:47:21,007 INFO L255 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-10-11 17:47:21,008 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:47:21,080 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 20 proven. 280 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:47:21,080 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:47:21,756 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 20 proven. 280 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:47:21,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143028234] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:47:21,756 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:47:21,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 52 [2024-10-11 17:47:21,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272613638] [2024-10-11 17:47:21,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:47:21,757 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2024-10-11 17:47:21,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:47:21,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2024-10-11 17:47:21,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=2512, Unknown=0, NotChecked=0, Total=2652 [2024-10-11 17:47:21,758 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand has 52 states, 52 states have (on average 2.6346153846153846) internal successors, (137), 52 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:22,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:47:22,317 INFO L93 Difference]: Finished difference Result 115 states and 117 transitions. [2024-10-11 17:47:22,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-10-11 17:47:22,318 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.6346153846153846) internal successors, (137), 52 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2024-10-11 17:47:22,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:47:22,318 INFO L225 Difference]: With dead ends: 115 [2024-10-11 17:47:22,318 INFO L226 Difference]: Without dead ends: 73 [2024-10-11 17:47:22,319 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=185, Invalid=3475, Unknown=0, NotChecked=0, Total=3660 [2024-10-11 17:47:22,319 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 2 mSDsluCounter, 1106 mSDsCounter, 0 mSdLazyCounter, 1264 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1140 SdHoareTripleChecker+Invalid, 1274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-11 17:47:22,319 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1140 Invalid, 1274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1264 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-11 17:47:22,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-10-11 17:47:22,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2024-10-11 17:47:22,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.0422535211267605) internal successors, (74), 71 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:22,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2024-10-11 17:47:22,320 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 69 [2024-10-11 17:47:22,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:47:22,321 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2024-10-11 17:47:22,321 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.6346153846153846) internal successors, (137), 52 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:22,321 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2024-10-11 17:47:22,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-10-11 17:47:22,321 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:47:22,321 INFO L215 NwaCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:47:22,334 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-10-11 17:47:22,522 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-10-11 17:47:22,522 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-10-11 17:47:22,522 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:47:22,522 INFO L85 PathProgramCache]: Analyzing trace with hash 492531936, now seen corresponding path program 19 times [2024-10-11 17:47:22,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:47:22,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014598487] [2024-10-11 17:47:22,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:47:22,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:47:22,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:47:23,192 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 90 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:47:23,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:47:23,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014598487] [2024-10-11 17:47:23,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014598487] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:47:23,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598948583] [2024-10-11 17:47:23,193 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-11 17:47:23,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:47:23,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:47:23,194 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:47:23,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-10-11 17:47:23,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:47:23,288 INFO L255 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 108 conjuncts are in the unsatisfiable core [2024-10-11 17:47:23,289 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:47:23,600 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 110 proven. 211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:47:23,601 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:47:24,050 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2024-10-11 17:47:24,232 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 110 proven. 211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:47:24,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598948583] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:47:24,233 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:47:24,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 57 [2024-10-11 17:47:24,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057460820] [2024-10-11 17:47:24,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:47:24,233 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2024-10-11 17:47:24,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:47:24,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2024-10-11 17:47:24,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=2936, Unknown=0, NotChecked=0, Total=3306 [2024-10-11 17:47:24,234 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand has 58 states, 57 states have (on average 2.543859649122807) internal successors, (145), 58 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:24,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:47:24,832 INFO L93 Difference]: Finished difference Result 77 states and 79 transitions. [2024-10-11 17:47:24,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-10-11 17:47:24,832 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 57 states have (on average 2.543859649122807) internal successors, (145), 58 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2024-10-11 17:47:24,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:47:24,832 INFO L225 Difference]: With dead ends: 77 [2024-10-11 17:47:24,832 INFO L226 Difference]: Without dead ends: 77 [2024-10-11 17:47:24,833 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 100 SyntacticMatches, 11 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1800 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=494, Invalid=4198, Unknown=0, NotChecked=0, Total=4692 [2024-10-11 17:47:24,833 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 1 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 1507 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 1507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-11 17:47:24,834 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 316 Invalid, 1507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1507 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-11 17:47:24,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-10-11 17:47:24,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2024-10-11 17:47:24,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.04) internal successors, (78), 75 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:24,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2024-10-11 17:47:24,835 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 71 [2024-10-11 17:47:24,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:47:24,835 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2024-10-11 17:47:24,835 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 57 states have (on average 2.543859649122807) internal successors, (145), 58 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:24,835 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2024-10-11 17:47:24,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2024-10-11 17:47:24,835 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:47:24,836 INFO L215 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:47:24,849 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-10-11 17:47:25,036 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:47:25,036 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-10-11 17:47:25,036 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:47:25,036 INFO L85 PathProgramCache]: Analyzing trace with hash 780028110, now seen corresponding path program 20 times [2024-10-11 17:47:25,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:47:25,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188456720] [2024-10-11 17:47:25,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:47:25,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:47:25,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:47:25,493 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 22 proven. 341 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:47:25,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:47:25,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188456720] [2024-10-11 17:47:25,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188456720] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:47:25,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368081802] [2024-10-11 17:47:25,494 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 17:47:25,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:47:25,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:47:25,495 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:47:25,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-10-11 17:47:25,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 17:47:25,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 17:47:25,612 INFO L255 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-10-11 17:47:25,613 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:47:25,705 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 22 proven. 341 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:47:25,705 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:47:26,431 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 22 proven. 341 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:47:26,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368081802] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:47:26,431 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:47:26,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 57 [2024-10-11 17:47:26,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469925729] [2024-10-11 17:47:26,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:47:26,432 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2024-10-11 17:47:26,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:47:26,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2024-10-11 17:47:26,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=3038, Unknown=0, NotChecked=0, Total=3192 [2024-10-11 17:47:26,433 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand has 57 states, 57 states have (on average 2.6315789473684212) internal successors, (150), 57 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:27,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:47:27,080 INFO L93 Difference]: Finished difference Result 125 states and 127 transitions. [2024-10-11 17:47:27,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-10-11 17:47:27,081 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.6315789473684212) internal successors, (150), 57 states have internal predecessors, (150), 0 states have call successors, (0), 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 75 [2024-10-11 17:47:27,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:47:27,081 INFO L225 Difference]: With dead ends: 125 [2024-10-11 17:47:27,081 INFO L226 Difference]: Without dead ends: 79 [2024-10-11 17:47:27,082 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 536 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=204, Invalid=4218, Unknown=0, NotChecked=0, Total=4422 [2024-10-11 17:47:27,082 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 2 mSDsluCounter, 1292 mSDsCounter, 0 mSdLazyCounter, 1486 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1329 SdHoareTripleChecker+Invalid, 1497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-11 17:47:27,082 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1329 Invalid, 1497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1486 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-11 17:47:27,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2024-10-11 17:47:27,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2024-10-11 17:47:27,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.0389610389610389) internal successors, (80), 77 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) [2024-10-11 17:47:27,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2024-10-11 17:47:27,084 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 75 [2024-10-11 17:47:27,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:47:27,084 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2024-10-11 17:47:27,084 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.6315789473684212) internal successors, (150), 57 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:27,084 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2024-10-11 17:47:27,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-10-11 17:47:27,085 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:47:27,085 INFO L215 NwaCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:47:27,098 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-10-11 17:47:27,285 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,24 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:47:27,285 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-10-11 17:47:27,285 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:47:27,286 INFO L85 PathProgramCache]: Analyzing trace with hash 662270396, now seen corresponding path program 21 times [2024-10-11 17:47:27,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:47:27,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804563041] [2024-10-11 17:47:27,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:47:27,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:47:27,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:47:28,106 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 110 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:47:28,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:47:28,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804563041] [2024-10-11 17:47:28,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804563041] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:47:28,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223181684] [2024-10-11 17:47:28,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 17:47:28,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:47:28,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:47:28,108 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:47:28,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-10-11 17:47:28,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2024-10-11 17:47:28,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 17:47:28,371 INFO L255 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 161 conjuncts are in the unsatisfiable core [2024-10-11 17:47:28,373 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:47:28,400 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-10-11 17:47:30,076 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 15 proven. 322 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2024-10-11 17:47:30,076 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:47:32,351 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2024-10-11 17:47:32,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223181684] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:47:32,352 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:47:32,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 37, 33] total 97 [2024-10-11 17:47:32,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391233037] [2024-10-11 17:47:32,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:47:32,352 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2024-10-11 17:47:32,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:47:32,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2024-10-11 17:47:32,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=796, Invalid=8710, Unknown=0, NotChecked=0, Total=9506 [2024-10-11 17:47:32,353 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand has 98 states, 97 states have (on average 2.0103092783505154) internal successors, (195), 98 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:40,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:47:40,779 INFO L93 Difference]: Finished difference Result 127 states and 129 transitions. [2024-10-11 17:47:40,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2024-10-11 17:47:40,779 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 97 states have (on average 2.0103092783505154) internal successors, (195), 98 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2024-10-11 17:47:40,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:47:40,780 INFO L225 Difference]: With dead ends: 127 [2024-10-11 17:47:40,780 INFO L226 Difference]: Without dead ends: 127 [2024-10-11 17:47:40,781 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9525 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=4039, Invalid=35761, Unknown=0, NotChecked=0, Total=39800 [2024-10-11 17:47:40,781 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 8 mSDsluCounter, 552 mSDsCounter, 0 mSdLazyCounter, 2909 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 566 SdHoareTripleChecker+Invalid, 2923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 2909 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-10-11 17:47:40,781 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 566 Invalid, 2923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 2909 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-10-11 17:47:40,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2024-10-11 17:47:40,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 126. [2024-10-11 17:47:40,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.024) internal successors, (128), 125 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:40,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 128 transitions. [2024-10-11 17:47:40,783 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 128 transitions. Word has length 77 [2024-10-11 17:47:40,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:47:40,784 INFO L471 AbstractCegarLoop]: Abstraction has 126 states and 128 transitions. [2024-10-11 17:47:40,784 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 97 states have (on average 2.0103092783505154) internal successors, (195), 98 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:40,784 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 128 transitions. [2024-10-11 17:47:40,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2024-10-11 17:47:40,785 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:47:40,785 INFO L215 NwaCegarLoop]: trace histogram [24, 23, 23, 23, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:47:40,800 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-10-11 17:47:40,985 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2024-10-11 17:47:40,985 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-10-11 17:47:40,986 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:47:40,986 INFO L85 PathProgramCache]: Analyzing trace with hash -876553500, now seen corresponding path program 22 times [2024-10-11 17:47:40,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:47:40,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050152244] [2024-10-11 17:47:40,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:47:40,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:47:41,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:47:41,642 INFO L134 CoverageAnalysis]: Checked inductivity of 1202 backedges. 552 proven. 408 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2024-10-11 17:47:41,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:47:41,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050152244] [2024-10-11 17:47:41,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050152244] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:47:41,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906625978] [2024-10-11 17:47:41,642 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-11 17:47:41,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:47:41,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:47:41,643 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:47:41,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-10-11 17:47:41,822 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-11 17:47:41,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 17:47:41,825 INFO L255 TraceCheckSpWp]: Trace formula consists of 681 conjuncts, 56 conjuncts are in the unsatisfiable core [2024-10-11 17:47:41,827 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:47:41,910 INFO L134 CoverageAnalysis]: Checked inductivity of 1202 backedges. 552 proven. 408 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2024-10-11 17:47:41,910 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:47:42,691 INFO L134 CoverageAnalysis]: Checked inductivity of 1202 backedges. 552 proven. 408 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2024-10-11 17:47:42,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906625978] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:47:42,691 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:47:42,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 60 [2024-10-11 17:47:42,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17839395] [2024-10-11 17:47:42,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:47:42,692 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2024-10-11 17:47:42,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:47:42,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2024-10-11 17:47:42,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=3380, Unknown=0, NotChecked=0, Total=3540 [2024-10-11 17:47:42,693 INFO L87 Difference]: Start difference. First operand 126 states and 128 transitions. Second operand has 60 states, 60 states have (on average 2.7333333333333334) internal successors, (164), 60 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:43,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:47:43,487 INFO L93 Difference]: Finished difference Result 179 states and 181 transitions. [2024-10-11 17:47:43,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-10-11 17:47:43,487 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.7333333333333334) internal successors, (164), 60 states have internal predecessors, (164), 0 states have call successors, (0), 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 125 [2024-10-11 17:47:43,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:47:43,488 INFO L225 Difference]: With dead ends: 179 [2024-10-11 17:47:43,488 INFO L226 Difference]: Without dead ends: 129 [2024-10-11 17:47:43,488 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=215, Invalid=4755, Unknown=0, NotChecked=0, Total=4970 [2024-10-11 17:47:43,488 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 1 mSDsluCounter, 1725 mSDsCounter, 0 mSdLazyCounter, 1922 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 1765 SdHoareTripleChecker+Invalid, 1934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1922 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-11 17:47:43,488 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 1765 Invalid, 1934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1922 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-11 17:47:43,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2024-10-11 17:47:43,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2024-10-11 17:47:43,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 1.0236220472440944) internal successors, (130), 127 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:43,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 130 transitions. [2024-10-11 17:47:43,491 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 130 transitions. Word has length 125 [2024-10-11 17:47:43,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:47:43,491 INFO L471 AbstractCegarLoop]: Abstraction has 128 states and 130 transitions. [2024-10-11 17:47:43,491 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.7333333333333334) internal successors, (164), 60 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:43,491 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 130 transitions. [2024-10-11 17:47:43,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2024-10-11 17:47:43,492 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:47:43,492 INFO L215 NwaCegarLoop]: trace histogram [24, 23, 23, 23, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:47:43,506 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-10-11 17:47:43,692 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2024-10-11 17:47:43,693 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-10-11 17:47:43,693 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:47:43,693 INFO L85 PathProgramCache]: Analyzing trace with hash 2012720210, now seen corresponding path program 23 times [2024-10-11 17:47:43,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:47:43,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445281136] [2024-10-11 17:47:43,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:47:43,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:47:43,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:47:44,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1227 backedges. 546 proven. 481 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2024-10-11 17:47:44,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:47:44,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445281136] [2024-10-11 17:47:44,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445281136] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:47:44,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166883688] [2024-10-11 17:47:44,402 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-11 17:47:44,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:47:44,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:47:44,403 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:47:44,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-10-11 17:47:44,870 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2024-10-11 17:47:44,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 17:47:44,875 INFO L255 TraceCheckSpWp]: Trace formula consists of 694 conjuncts, 60 conjuncts are in the unsatisfiable core [2024-10-11 17:47:44,877 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:47:44,976 INFO L134 CoverageAnalysis]: Checked inductivity of 1227 backedges. 546 proven. 481 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2024-10-11 17:47:44,976 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:47:45,931 INFO L134 CoverageAnalysis]: Checked inductivity of 1227 backedges. 546 proven. 481 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2024-10-11 17:47:45,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166883688] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:47:45,931 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:47:45,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 64 [2024-10-11 17:47:45,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992517424] [2024-10-11 17:47:45,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:47:45,932 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2024-10-11 17:47:45,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:47:45,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2024-10-11 17:47:45,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=3862, Unknown=0, NotChecked=0, Total=4032 [2024-10-11 17:47:45,933 INFO L87 Difference]: Start difference. First operand 128 states and 130 transitions. Second operand has 64 states, 64 states have (on average 2.75) internal successors, (176), 64 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:46,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:47:46,802 INFO L93 Difference]: Finished difference Result 185 states and 187 transitions. [2024-10-11 17:47:46,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-10-11 17:47:46,802 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.75) internal successors, (176), 64 states have internal predecessors, (176), 0 states have call successors, (0), 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 127 [2024-10-11 17:47:46,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:47:46,803 INFO L225 Difference]: With dead ends: 185 [2024-10-11 17:47:46,803 INFO L226 Difference]: Without dead ends: 131 [2024-10-11 17:47:46,803 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=230, Invalid=5470, Unknown=0, NotChecked=0, Total=5700 [2024-10-11 17:47:46,804 INFO L432 NwaCegarLoop]: 43 mSDtfsCounter, 2 mSDsluCounter, 1706 mSDsCounter, 0 mSdLazyCounter, 1927 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1749 SdHoareTripleChecker+Invalid, 1940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1927 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-11 17:47:46,804 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1749 Invalid, 1940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1927 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-11 17:47:46,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2024-10-11 17:47:46,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 130. [2024-10-11 17:47:46,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 1.0232558139534884) internal successors, (132), 129 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:46,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 132 transitions. [2024-10-11 17:47:46,806 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 132 transitions. Word has length 127 [2024-10-11 17:47:46,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:47:46,806 INFO L471 AbstractCegarLoop]: Abstraction has 130 states and 132 transitions. [2024-10-11 17:47:46,807 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.75) internal successors, (176), 64 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:46,807 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 132 transitions. [2024-10-11 17:47:46,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2024-10-11 17:47:46,807 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:47:46,808 INFO L215 NwaCegarLoop]: trace histogram [24, 23, 23, 23, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:47:46,824 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-10-11 17:47:47,008 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,27 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:47:47,008 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-10-11 17:47:47,009 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:47:47,009 INFO L85 PathProgramCache]: Analyzing trace with hash -239084992, now seen corresponding path program 24 times [2024-10-11 17:47:47,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:47:47,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903877496] [2024-10-11 17:47:47,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:47:47,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:47:47,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:47:47,728 INFO L134 CoverageAnalysis]: Checked inductivity of 1254 backedges. 532 proven. 560 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2024-10-11 17:47:47,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:47:47,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903877496] [2024-10-11 17:47:47,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903877496] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:47:47,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712352348] [2024-10-11 17:47:47,728 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-11 17:47:47,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:47:47,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:47:47,729 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:47:47,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-10-11 17:47:48,732 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2024-10-11 17:47:48,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 17:47:48,737 INFO L255 TraceCheckSpWp]: Trace formula consists of 707 conjuncts, 64 conjuncts are in the unsatisfiable core [2024-10-11 17:47:48,739 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:47:48,834 INFO L134 CoverageAnalysis]: Checked inductivity of 1254 backedges. 532 proven. 560 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2024-10-11 17:47:48,835 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:47:49,875 INFO L134 CoverageAnalysis]: Checked inductivity of 1254 backedges. 532 proven. 560 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2024-10-11 17:47:49,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712352348] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:47:49,875 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:47:49,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 68 [2024-10-11 17:47:49,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31580494] [2024-10-11 17:47:49,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:47:49,876 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2024-10-11 17:47:49,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:47:49,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2024-10-11 17:47:49,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=4376, Unknown=0, NotChecked=0, Total=4556 [2024-10-11 17:47:49,877 INFO L87 Difference]: Start difference. First operand 130 states and 132 transitions. Second operand has 68 states, 68 states have (on average 2.764705882352941) internal successors, (188), 68 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:50,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:47:50,852 INFO L93 Difference]: Finished difference Result 191 states and 193 transitions. [2024-10-11 17:47:50,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-10-11 17:47:50,852 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.764705882352941) internal successors, (188), 68 states have internal predecessors, (188), 0 states have call successors, (0), 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 129 [2024-10-11 17:47:50,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:47:50,853 INFO L225 Difference]: With dead ends: 191 [2024-10-11 17:47:50,853 INFO L226 Difference]: Without dead ends: 133 [2024-10-11 17:47:50,853 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 730 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=245, Invalid=6235, Unknown=0, NotChecked=0, Total=6480 [2024-10-11 17:47:50,854 INFO L432 NwaCegarLoop]: 46 mSDtfsCounter, 2 mSDsluCounter, 1916 mSDsCounter, 0 mSdLazyCounter, 2152 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1962 SdHoareTripleChecker+Invalid, 2166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 2152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-11 17:47:50,854 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1962 Invalid, 2166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 2152 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-11 17:47:50,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2024-10-11 17:47:50,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 132. [2024-10-11 17:47:50,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 1.0229007633587786) internal successors, (134), 131 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:50,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 134 transitions. [2024-10-11 17:47:50,855 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 134 transitions. Word has length 129 [2024-10-11 17:47:50,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:47:50,856 INFO L471 AbstractCegarLoop]: Abstraction has 132 states and 134 transitions. [2024-10-11 17:47:50,856 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.764705882352941) internal successors, (188), 68 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:50,856 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 134 transitions. [2024-10-11 17:47:50,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2024-10-11 17:47:50,856 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:47:50,857 INFO L215 NwaCegarLoop]: trace histogram [24, 23, 23, 23, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:47:50,872 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-10-11 17:47:51,057 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,28 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:47:51,057 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-10-11 17:47:51,057 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:47:51,057 INFO L85 PathProgramCache]: Analyzing trace with hash 439633070, now seen corresponding path program 25 times [2024-10-11 17:47:51,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:47:51,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269709008] [2024-10-11 17:47:51,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:47:51,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:47:51,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:47:51,817 INFO L134 CoverageAnalysis]: Checked inductivity of 1283 backedges. 510 proven. 645 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2024-10-11 17:47:51,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:47:51,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269709008] [2024-10-11 17:47:51,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269709008] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:47:51,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614832994] [2024-10-11 17:47:51,817 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-11 17:47:51,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:47:51,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:47:51,818 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:47:51,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-10-11 17:47:51,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:47:51,987 INFO L255 TraceCheckSpWp]: Trace formula consists of 720 conjuncts, 69 conjuncts are in the unsatisfiable core [2024-10-11 17:47:51,989 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:47:52,114 INFO L134 CoverageAnalysis]: Checked inductivity of 1283 backedges. 510 proven. 645 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2024-10-11 17:47:52,114 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:47:53,258 INFO L134 CoverageAnalysis]: Checked inductivity of 1283 backedges. 510 proven. 645 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2024-10-11 17:47:53,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614832994] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:47:53,258 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:47:53,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 73 [2024-10-11 17:47:53,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225108818] [2024-10-11 17:47:53,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:47:53,259 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2024-10-11 17:47:53,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:47:53,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2024-10-11 17:47:53,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=5062, Unknown=0, NotChecked=0, Total=5256 [2024-10-11 17:47:53,260 INFO L87 Difference]: Start difference. First operand 132 states and 134 transitions. Second operand has 73 states, 73 states have (on average 2.7534246575342465) internal successors, (201), 73 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:54,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:47:54,424 INFO L93 Difference]: Finished difference Result 197 states and 199 transitions. [2024-10-11 17:47:54,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2024-10-11 17:47:54,425 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.7534246575342465) internal successors, (201), 73 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 131 [2024-10-11 17:47:54,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:47:54,425 INFO L225 Difference]: With dead ends: 197 [2024-10-11 17:47:54,425 INFO L226 Difference]: Without dead ends: 135 [2024-10-11 17:47:54,426 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 870 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=264, Invalid=7218, Unknown=0, NotChecked=0, Total=7482 [2024-10-11 17:47:54,426 INFO L432 NwaCegarLoop]: 49 mSDtfsCounter, 1 mSDsluCounter, 2466 mSDsCounter, 0 mSdLazyCounter, 2744 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 2515 SdHoareTripleChecker+Invalid, 2759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 2744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-10-11 17:47:54,426 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 2515 Invalid, 2759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 2744 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-10-11 17:47:54,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2024-10-11 17:47:54,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 134. [2024-10-11 17:47:54,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 1.0225563909774436) internal successors, (136), 133 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:54,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 136 transitions. [2024-10-11 17:47:54,429 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 136 transitions. Word has length 131 [2024-10-11 17:47:54,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:47:54,429 INFO L471 AbstractCegarLoop]: Abstraction has 134 states and 136 transitions. [2024-10-11 17:47:54,429 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.7534246575342465) internal successors, (201), 73 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:54,429 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 136 transitions. [2024-10-11 17:47:54,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2024-10-11 17:47:54,430 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:47:54,430 INFO L215 NwaCegarLoop]: trace histogram [24, 23, 23, 23, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:47:54,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2024-10-11 17:47:54,630 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-10-11 17:47:54,631 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-10-11 17:47:54,631 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:47:54,631 INFO L85 PathProgramCache]: Analyzing trace with hash -147338340, now seen corresponding path program 26 times [2024-10-11 17:47:54,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:47:54,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137808838] [2024-10-11 17:47:54,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:47:54,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:47:54,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:47:55,409 INFO L134 CoverageAnalysis]: Checked inductivity of 1314 backedges. 480 proven. 736 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2024-10-11 17:47:55,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:47:55,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137808838] [2024-10-11 17:47:55,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137808838] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:47:55,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162577363] [2024-10-11 17:47:55,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 17:47:55,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:47:55,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:47:55,410 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:47:55,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-10-11 17:47:55,572 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 17:47:55,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 17:47:55,575 INFO L255 TraceCheckSpWp]: Trace formula consists of 733 conjuncts, 73 conjuncts are in the unsatisfiable core [2024-10-11 17:47:55,577 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:47:55,706 INFO L134 CoverageAnalysis]: Checked inductivity of 1314 backedges. 480 proven. 736 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2024-10-11 17:47:55,706 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:47:56,985 INFO L134 CoverageAnalysis]: Checked inductivity of 1314 backedges. 480 proven. 736 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2024-10-11 17:47:56,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162577363] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:47:56,985 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:47:56,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 77 [2024-10-11 17:47:56,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591146291] [2024-10-11 17:47:56,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:47:56,985 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2024-10-11 17:47:56,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:47:56,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2024-10-11 17:47:56,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=5648, Unknown=0, NotChecked=0, Total=5852 [2024-10-11 17:47:56,987 INFO L87 Difference]: Start difference. First operand 134 states and 136 transitions. Second operand has 77 states, 77 states have (on average 2.7662337662337664) internal successors, (213), 77 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:58,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:47:58,205 INFO L93 Difference]: Finished difference Result 203 states and 205 transitions. [2024-10-11 17:47:58,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2024-10-11 17:47:58,205 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.7662337662337664) internal successors, (213), 77 states have internal predecessors, (213), 0 states have call successors, (0), 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 133 [2024-10-11 17:47:58,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:47:58,206 INFO L225 Difference]: With dead ends: 203 [2024-10-11 17:47:58,206 INFO L226 Difference]: Without dead ends: 137 [2024-10-11 17:47:58,206 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 966 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=279, Invalid=8093, Unknown=0, NotChecked=0, Total=8372 [2024-10-11 17:47:58,206 INFO L432 NwaCegarLoop]: 52 mSDtfsCounter, 2 mSDsluCounter, 2532 mSDsCounter, 0 mSdLazyCounter, 2799 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2584 SdHoareTripleChecker+Invalid, 2815 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 2799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-10-11 17:47:58,207 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 2584 Invalid, 2815 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 2799 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-10-11 17:47:58,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2024-10-11 17:47:58,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 136. [2024-10-11 17:47:58,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.0222222222222221) internal successors, (138), 135 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:58,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 138 transitions. [2024-10-11 17:47:58,208 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 138 transitions. Word has length 133 [2024-10-11 17:47:58,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:47:58,209 INFO L471 AbstractCegarLoop]: Abstraction has 136 states and 138 transitions. [2024-10-11 17:47:58,209 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.7662337662337664) internal successors, (213), 77 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:47:58,209 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 138 transitions. [2024-10-11 17:47:58,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2024-10-11 17:47:58,209 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:47:58,209 INFO L215 NwaCegarLoop]: trace histogram [24, 23, 23, 23, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:47:58,223 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-10-11 17:47:58,409 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,30 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:47:58,410 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-10-11 17:47:58,410 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:47:58,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1586147574, now seen corresponding path program 27 times [2024-10-11 17:47:58,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:47:58,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783817163] [2024-10-11 17:47:58,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:47:58,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:47:58,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:47:59,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1347 backedges. 442 proven. 833 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2024-10-11 17:47:59,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:47:59,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783817163] [2024-10-11 17:47:59,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783817163] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:47:59,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784762332] [2024-10-11 17:47:59,327 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 17:47:59,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:47:59,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:47:59,328 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:47:59,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-10-11 17:48:00,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2024-10-11 17:48:00,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 17:48:00,140 INFO L255 TraceCheckSpWp]: Trace formula consists of 746 conjuncts, 76 conjuncts are in the unsatisfiable core [2024-10-11 17:48:00,142 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:48:00,278 INFO L134 CoverageAnalysis]: Checked inductivity of 1347 backedges. 442 proven. 833 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2024-10-11 17:48:00,278 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:48:01,669 INFO L134 CoverageAnalysis]: Checked inductivity of 1347 backedges. 442 proven. 833 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2024-10-11 17:48:01,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784762332] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:48:01,670 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:48:01,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 80 [2024-10-11 17:48:01,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998410593] [2024-10-11 17:48:01,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:48:01,670 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2024-10-11 17:48:01,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:48:01,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2024-10-11 17:48:01,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=6110, Unknown=0, NotChecked=0, Total=6320 [2024-10-11 17:48:01,672 INFO L87 Difference]: Start difference. First operand 136 states and 138 transitions. Second operand has 80 states, 80 states have (on average 2.8) internal successors, (224), 80 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:48:02,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:48:03,000 INFO L93 Difference]: Finished difference Result 209 states and 211 transitions. [2024-10-11 17:48:03,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2024-10-11 17:48:03,000 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.8) internal successors, (224), 80 states have internal predecessors, (224), 0 states have call successors, (0), 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 135 [2024-10-11 17:48:03,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:48:03,001 INFO L225 Difference]: With dead ends: 209 [2024-10-11 17:48:03,001 INFO L226 Difference]: Without dead ends: 139 [2024-10-11 17:48:03,001 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1009 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=290, Invalid=8830, Unknown=0, NotChecked=0, Total=9120 [2024-10-11 17:48:03,001 INFO L432 NwaCegarLoop]: 55 mSDtfsCounter, 1 mSDsluCounter, 2744 mSDsCounter, 0 mSdLazyCounter, 2926 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 2799 SdHoareTripleChecker+Invalid, 2943 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 2926 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-10-11 17:48:03,002 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 2799 Invalid, 2943 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 2926 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-10-11 17:48:03,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2024-10-11 17:48:03,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 138. [2024-10-11 17:48:03,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 1.0218978102189782) internal successors, (140), 137 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:48:03,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 140 transitions. [2024-10-11 17:48:03,003 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 140 transitions. Word has length 135 [2024-10-11 17:48:03,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:48:03,004 INFO L471 AbstractCegarLoop]: Abstraction has 138 states and 140 transitions. [2024-10-11 17:48:03,004 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.8) internal successors, (224), 80 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:48:03,004 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 140 transitions. [2024-10-11 17:48:03,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2024-10-11 17:48:03,004 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:48:03,004 INFO L215 NwaCegarLoop]: trace histogram [24, 23, 23, 23, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:48:03,019 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-10-11 17:48:03,205 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-10-11 17:48:03,205 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-10-11 17:48:03,205 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:48:03,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1302352136, now seen corresponding path program 28 times [2024-10-11 17:48:03,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:48:03,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77201947] [2024-10-11 17:48:03,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:48:03,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:48:03,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:48:04,110 INFO L134 CoverageAnalysis]: Checked inductivity of 1382 backedges. 396 proven. 936 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-10-11 17:48:04,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:48:04,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77201947] [2024-10-11 17:48:04,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77201947] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:48:04,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300010748] [2024-10-11 17:48:04,111 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-11 17:48:04,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:48:04,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:48:04,112 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:48:04,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-10-11 17:48:04,424 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-11 17:48:04,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 17:48:04,428 INFO L255 TraceCheckSpWp]: Trace formula consists of 759 conjuncts, 80 conjuncts are in the unsatisfiable core [2024-10-11 17:48:04,430 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:48:04,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1382 backedges. 396 proven. 936 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-10-11 17:48:04,555 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:48:06,093 INFO L134 CoverageAnalysis]: Checked inductivity of 1382 backedges. 396 proven. 936 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-10-11 17:48:06,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300010748] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:48:06,094 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:48:06,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 84 [2024-10-11 17:48:06,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242147350] [2024-10-11 17:48:06,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:48:06,094 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2024-10-11 17:48:06,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:48:06,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2024-10-11 17:48:06,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=6752, Unknown=0, NotChecked=0, Total=6972 [2024-10-11 17:48:06,096 INFO L87 Difference]: Start difference. First operand 138 states and 140 transitions. Second operand has 84 states, 84 states have (on average 2.8095238095238093) internal successors, (236), 84 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:48:07,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:48:07,675 INFO L93 Difference]: Finished difference Result 215 states and 217 transitions. [2024-10-11 17:48:07,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2024-10-11 17:48:07,676 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.8095238095238093) internal successors, (236), 84 states have internal predecessors, (236), 0 states have call successors, (0), 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 137 [2024-10-11 17:48:07,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:48:07,676 INFO L225 Difference]: With dead ends: 215 [2024-10-11 17:48:07,676 INFO L226 Difference]: Without dead ends: 141 [2024-10-11 17:48:07,677 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1112 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=305, Invalid=9795, Unknown=0, NotChecked=0, Total=10100 [2024-10-11 17:48:07,677 INFO L432 NwaCegarLoop]: 58 mSDtfsCounter, 1 mSDsluCounter, 3403 mSDsCounter, 0 mSdLazyCounter, 3628 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 3461 SdHoareTripleChecker+Invalid, 3646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 3628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-10-11 17:48:07,677 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 3461 Invalid, 3646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 3628 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-10-11 17:48:07,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2024-10-11 17:48:07,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 140. [2024-10-11 17:48:07,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 1.0215827338129497) internal successors, (142), 139 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:48:07,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 142 transitions. [2024-10-11 17:48:07,679 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 142 transitions. Word has length 137 [2024-10-11 17:48:07,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:48:07,679 INFO L471 AbstractCegarLoop]: Abstraction has 140 states and 142 transitions. [2024-10-11 17:48:07,679 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 2.8095238095238093) internal successors, (236), 84 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:48:07,679 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 142 transitions. [2024-10-11 17:48:07,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2024-10-11 17:48:07,680 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:48:07,680 INFO L215 NwaCegarLoop]: trace histogram [24, 23, 23, 23, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:48:07,694 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2024-10-11 17:48:07,880 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-10-11 17:48:07,880 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-10-11 17:48:07,881 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:48:07,881 INFO L85 PathProgramCache]: Analyzing trace with hash 842124134, now seen corresponding path program 29 times [2024-10-11 17:48:07,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:48:07,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749753759] [2024-10-11 17:48:07,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:48:07,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:48:07,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:48:08,897 INFO L134 CoverageAnalysis]: Checked inductivity of 1419 backedges. 342 proven. 1045 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-10-11 17:48:08,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:48:08,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749753759] [2024-10-11 17:48:08,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749753759] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:48:08,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761017356] [2024-10-11 17:48:08,898 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-11 17:48:08,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:48:08,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:48:08,899 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:48:08,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-10-11 17:48:09,234 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2024-10-11 17:48:09,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 17:48:09,239 INFO L255 TraceCheckSpWp]: Trace formula consists of 772 conjuncts, 84 conjuncts are in the unsatisfiable core [2024-10-11 17:48:09,241 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:48:09,371 INFO L134 CoverageAnalysis]: Checked inductivity of 1419 backedges. 342 proven. 1045 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-10-11 17:48:09,371 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:48:11,091 INFO L134 CoverageAnalysis]: Checked inductivity of 1419 backedges. 342 proven. 1045 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-10-11 17:48:11,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761017356] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:48:11,092 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:48:11,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 88 [2024-10-11 17:48:11,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942522929] [2024-10-11 17:48:11,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:48:11,092 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2024-10-11 17:48:11,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:48:11,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2024-10-11 17:48:11,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=7426, Unknown=0, NotChecked=0, Total=7656 [2024-10-11 17:48:11,094 INFO L87 Difference]: Start difference. First operand 140 states and 142 transitions. Second operand has 88 states, 88 states have (on average 2.8181818181818183) internal successors, (248), 88 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:48:12,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:48:12,686 INFO L93 Difference]: Finished difference Result 221 states and 223 transitions. [2024-10-11 17:48:12,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2024-10-11 17:48:12,687 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 2.8181818181818183) internal successors, (248), 88 states have internal predecessors, (248), 0 states have call successors, (0), 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 139 [2024-10-11 17:48:12,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:48:12,687 INFO L225 Difference]: With dead ends: 221 [2024-10-11 17:48:12,687 INFO L226 Difference]: Without dead ends: 143 [2024-10-11 17:48:12,688 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1220 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=320, Invalid=10810, Unknown=0, NotChecked=0, Total=11130 [2024-10-11 17:48:12,688 INFO L432 NwaCegarLoop]: 61 mSDtfsCounter, 2 mSDsluCounter, 3233 mSDsCounter, 0 mSdLazyCounter, 3482 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 3294 SdHoareTripleChecker+Invalid, 3501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 3482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-10-11 17:48:12,688 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 3294 Invalid, 3501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 3482 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-10-11 17:48:12,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2024-10-11 17:48:12,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 142. [2024-10-11 17:48:12,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.0212765957446808) internal successors, (144), 141 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:48:12,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 144 transitions. [2024-10-11 17:48:12,690 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 144 transitions. Word has length 139 [2024-10-11 17:48:12,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:48:12,690 INFO L471 AbstractCegarLoop]: Abstraction has 142 states and 144 transitions. [2024-10-11 17:48:12,690 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 2.8181818181818183) internal successors, (248), 88 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:48:12,690 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 144 transitions. [2024-10-11 17:48:12,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2024-10-11 17:48:12,691 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:48:12,691 INFO L215 NwaCegarLoop]: trace histogram [24, 23, 23, 23, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:48:12,705 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2024-10-11 17:48:12,891 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-10-11 17:48:12,891 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-10-11 17:48:12,891 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:48:12,892 INFO L85 PathProgramCache]: Analyzing trace with hash 99517524, now seen corresponding path program 30 times [2024-10-11 17:48:12,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:48:12,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171111477] [2024-10-11 17:48:12,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:48:12,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:48:12,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:48:13,905 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 280 proven. 1160 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-11 17:48:13,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:48:13,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171111477] [2024-10-11 17:48:13,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171111477] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:48:13,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299101826] [2024-10-11 17:48:13,906 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-11 17:48:13,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:48:13,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:48:13,907 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:48:13,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-10-11 17:48:16,276 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2024-10-11 17:48:16,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 17:48:16,284 INFO L255 TraceCheckSpWp]: Trace formula consists of 785 conjuncts, 89 conjuncts are in the unsatisfiable core [2024-10-11 17:48:16,286 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:48:16,444 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 280 proven. 1160 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-11 17:48:16,444 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:48:18,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 280 proven. 1160 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-11 17:48:18,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299101826] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:48:18,319 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:48:18,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46, 46] total 93 [2024-10-11 17:48:18,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796675626] [2024-10-11 17:48:18,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:48:18,319 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2024-10-11 17:48:18,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:48:18,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2024-10-11 17:48:18,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=8312, Unknown=0, NotChecked=0, Total=8556 [2024-10-11 17:48:18,320 INFO L87 Difference]: Start difference. First operand 142 states and 144 transitions. Second operand has 93 states, 93 states have (on average 2.806451612903226) internal successors, (261), 93 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)