./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/subseq-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 8be7027f Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/array-memsafety/subseq-alloca-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 332083c9703e7f789c3b57b3574f68dffe1c5555ad9f8a0d56f0eaba0a86f436 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dk.perfect-tracechecks-8be7027-m [2024-11-12 13:13:16,908 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-12 13:13:16,977 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-12 13:13:16,985 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-12 13:13:16,985 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-12 13:13:17,029 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-12 13:13:17,030 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-12 13:13:17,030 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-12 13:13:17,031 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-12 13:13:17,031 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-12 13:13:17,032 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-12 13:13:17,032 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-12 13:13:17,033 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-12 13:13:17,034 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-12 13:13:17,035 INFO L153 SettingsManager]: * Use SBE=true [2024-11-12 13:13:17,036 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-12 13:13:17,036 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-12 13:13:17,037 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-12 13:13:17,037 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-12 13:13:17,037 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-12 13:13:17,038 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-12 13:13:17,041 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-12 13:13:17,041 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-12 13:13:17,041 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-12 13:13:17,042 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-12 13:13:17,042 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-12 13:13:17,042 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-12 13:13:17,043 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-12 13:13:17,043 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-12 13:13:17,043 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-12 13:13:17,043 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-12 13:13:17,044 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-12 13:13:17,044 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-12 13:13:17,044 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-12 13:13:17,044 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-12 13:13:17,045 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-12 13:13:17,045 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-12 13:13:17,045 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-12 13:13:17,045 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-12 13:13:17,045 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-12 13:13:17,046 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-12 13:13:17,047 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-12 13:13:17,047 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 332083c9703e7f789c3b57b3574f68dffe1c5555ad9f8a0d56f0eaba0a86f436 [2024-11-12 13:13:17,314 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-12 13:13:17,338 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-12 13:13:17,341 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-12 13:13:17,342 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-12 13:13:17,343 INFO L274 PluginConnector]: CDTParser initialized [2024-11-12 13:13:17,344 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/subseq-alloca-2.i [2024-11-12 13:13:18,787 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-12 13:13:19,035 INFO L384 CDTParser]: Found 1 translation units. [2024-11-12 13:13:19,039 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/subseq-alloca-2.i [2024-11-12 13:13:19,056 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/356a96472/084a3d35c4c2418d892836a9e6b2cacd/FLAG9b6da4072 [2024-11-12 13:13:19,074 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/356a96472/084a3d35c4c2418d892836a9e6b2cacd [2024-11-12 13:13:19,076 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-12 13:13:19,078 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-12 13:13:19,080 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-12 13:13:19,081 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-12 13:13:19,086 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-12 13:13:19,087 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 01:13:19" (1/1) ... [2024-11-12 13:13:19,087 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fb4a626 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:13:19, skipping insertion in model container [2024-11-12 13:13:19,088 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 01:13:19" (1/1) ... [2024-11-12 13:13:19,132 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-12 13:13:19,493 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-12 13:13:19,496 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-12 13:13:19,502 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-12 13:13:19,512 INFO L200 MainTranslator]: Completed pre-run [2024-11-12 13:13:19,558 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-12 13:13:19,590 INFO L204 MainTranslator]: Completed translation [2024-11-12 13:13:19,591 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:13:19 WrapperNode [2024-11-12 13:13:19,591 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-12 13:13:19,592 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-12 13:13:19,593 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-12 13:13:19,593 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-12 13:13:19,600 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:13:19" (1/1) ... [2024-11-12 13:13:19,617 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:13:19" (1/1) ... [2024-11-12 13:13:19,641 INFO L138 Inliner]: procedures = 117, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 102 [2024-11-12 13:13:19,642 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-12 13:13:19,643 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-12 13:13:19,644 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-12 13:13:19,644 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-12 13:13:19,653 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:13:19" (1/1) ... [2024-11-12 13:13:19,654 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:13:19" (1/1) ... [2024-11-12 13:13:19,656 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:13:19" (1/1) ... [2024-11-12 13:13:19,671 INFO L175 MemorySlicer]: Split 9 memory accesses to 2 slices as follows [4, 5]. 56 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0, 0]. The 4 writes are split as follows [2, 2]. [2024-11-12 13:13:19,675 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:13:19" (1/1) ... [2024-11-12 13:13:19,676 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:13:19" (1/1) ... [2024-11-12 13:13:19,681 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:13:19" (1/1) ... [2024-11-12 13:13:19,684 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:13:19" (1/1) ... [2024-11-12 13:13:19,686 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:13:19" (1/1) ... [2024-11-12 13:13:19,687 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:13:19" (1/1) ... [2024-11-12 13:13:19,689 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-12 13:13:19,690 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-12 13:13:19,690 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-12 13:13:19,690 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-12 13:13:19,691 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:13:19" (1/1) ... [2024-11-12 13:13:19,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-12 13:13:19,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 13:13:19,725 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-12 13:13:19,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-12 13:13:19,766 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-12 13:13:19,766 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-12 13:13:19,767 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-12 13:13:19,767 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-12 13:13:19,767 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-12 13:13:19,767 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-12 13:13:19,767 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-12 13:13:19,767 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-12 13:13:19,875 INFO L238 CfgBuilder]: Building ICFG [2024-11-12 13:13:19,876 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-12 13:13:20,079 INFO L? ?]: Removed 61 outVars from TransFormulas that were not future-live. [2024-11-12 13:13:20,080 INFO L287 CfgBuilder]: Performing block encoding [2024-11-12 13:13:20,099 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-12 13:13:20,103 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-12 13:13:20,104 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 01:13:20 BoogieIcfgContainer [2024-11-12 13:13:20,104 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-12 13:13:20,106 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-12 13:13:20,106 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-12 13:13:20,110 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-12 13:13:20,110 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 01:13:19" (1/3) ... [2024-11-12 13:13:20,111 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56cc667b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 01:13:20, skipping insertion in model container [2024-11-12 13:13:20,111 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:13:19" (2/3) ... [2024-11-12 13:13:20,111 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56cc667b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 01:13:20, skipping insertion in model container [2024-11-12 13:13:20,112 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 01:13:20" (3/3) ... [2024-11-12 13:13:20,113 INFO L112 eAbstractionObserver]: Analyzing ICFG subseq-alloca-2.i [2024-11-12 13:13:20,125 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-12 13:13:20,126 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 19 error locations. [2024-11-12 13:13:20,162 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-12 13:13:20,168 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;@609c31ef, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-12 13:13:20,168 INFO L334 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2024-11-12 13:13:20,172 INFO L276 IsEmpty]: Start isEmpty. Operand has 53 states, 33 states have (on average 1.9090909090909092) internal successors, (63), 52 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:20,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-12 13:13:20,178 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:13:20,179 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:13:20,180 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-12 13:13:20,188 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:13:20,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1805029096, now seen corresponding path program 1 times [2024-11-12 13:13:20,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:13:20,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646117769] [2024-11-12 13:13:20,198 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:13:20,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:13:20,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:13:20,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:13:20,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:13:20,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646117769] [2024-11-12 13:13:20,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646117769] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 13:13:20,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 13:13:20,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-12 13:13:20,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782558302] [2024-11-12 13:13:20,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 13:13:20,559 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 13:13:20,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:13:20,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 13:13:20,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-12 13:13:20,588 INFO L87 Difference]: Start difference. First operand has 53 states, 33 states have (on average 1.9090909090909092) internal successors, (63), 52 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:20,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:13:20,656 INFO L93 Difference]: Finished difference Result 66 states and 76 transitions. [2024-11-12 13:13:20,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-12 13:13:20,659 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-12 13:13:20,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:13:20,666 INFO L225 Difference]: With dead ends: 66 [2024-11-12 13:13:20,667 INFO L226 Difference]: Without dead ends: 64 [2024-11-12 13:13:20,668 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-12 13:13:20,672 INFO L435 NwaCegarLoop]: 56 mSDtfsCounter, 12 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-12 13:13:20,673 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 154 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-12 13:13:20,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-11-12 13:13:20,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 54. [2024-11-12 13:13:20,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 35 states have (on average 1.7714285714285714) internal successors, (62), 53 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:20,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2024-11-12 13:13:20,707 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 7 [2024-11-12 13:13:20,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:13:20,708 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2024-11-12 13:13:20,709 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:20,709 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2024-11-12 13:13:20,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-12 13:13:20,710 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:13:20,710 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:13:20,710 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-12 13:13:20,711 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-12 13:13:20,711 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:13:20,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876138, now seen corresponding path program 1 times [2024-11-12 13:13:20,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:13:20,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132288611] [2024-11-12 13:13:20,712 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:13:20,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:13:20,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:13:20,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:13:20,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:13:20,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132288611] [2024-11-12 13:13:20,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132288611] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 13:13:20,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 13:13:20,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-12 13:13:20,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888666485] [2024-11-12 13:13:20,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 13:13:20,933 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 13:13:20,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:13:20,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 13:13:20,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 13:13:20,934 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:20,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:13:20,990 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2024-11-12 13:13:20,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 13:13:20,991 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-12 13:13:20,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:13:20,993 INFO L225 Difference]: With dead ends: 52 [2024-11-12 13:13:20,993 INFO L226 Difference]: Without dead ends: 52 [2024-11-12 13:13:20,993 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 13:13:20,995 INFO L435 NwaCegarLoop]: 47 mSDtfsCounter, 17 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-12 13:13:20,996 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 67 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-12 13:13:20,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-11-12 13:13:21,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2024-11-12 13:13:21,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 35 states have (on average 1.7142857142857142) internal successors, (60), 51 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:21,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2024-11-12 13:13:21,004 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 7 [2024-11-12 13:13:21,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:13:21,004 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2024-11-12 13:13:21,004 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:21,005 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2024-11-12 13:13:21,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-12 13:13:21,005 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:13:21,005 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:13:21,005 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-12 13:13:21,006 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-12 13:13:21,006 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:13:21,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876139, now seen corresponding path program 1 times [2024-11-12 13:13:21,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:13:21,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242341929] [2024-11-12 13:13:21,007 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:13:21,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:13:21,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:13:21,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:13:21,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:13:21,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242341929] [2024-11-12 13:13:21,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242341929] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 13:13:21,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 13:13:21,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-12 13:13:21,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263213720] [2024-11-12 13:13:21,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 13:13:21,307 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 13:13:21,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:13:21,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 13:13:21,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-12 13:13:21,309 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:21,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:13:21,410 INFO L93 Difference]: Finished difference Result 56 states and 65 transitions. [2024-11-12 13:13:21,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 13:13:21,411 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-12 13:13:21,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:13:21,412 INFO L225 Difference]: With dead ends: 56 [2024-11-12 13:13:21,413 INFO L226 Difference]: Without dead ends: 56 [2024-11-12 13:13:21,414 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-12 13:13:21,415 INFO L435 NwaCegarLoop]: 47 mSDtfsCounter, 26 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-12 13:13:21,416 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 118 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-12 13:13:21,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-11-12 13:13:21,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2024-11-12 13:13:21,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 37 states have (on average 1.7027027027027026) internal successors, (63), 53 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:21,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2024-11-12 13:13:21,426 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 7 [2024-11-12 13:13:21,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:13:21,426 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2024-11-12 13:13:21,426 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:21,427 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2024-11-12 13:13:21,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-12 13:13:21,428 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:13:21,428 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:13:21,428 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-12 13:13:21,428 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-12 13:13:21,429 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:13:21,430 INFO L85 PathProgramCache]: Analyzing trace with hash -533876908, now seen corresponding path program 1 times [2024-11-12 13:13:21,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:13:21,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312009588] [2024-11-12 13:13:21,431 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:13:21,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:13:21,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:13:21,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:13:21,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:13:21,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312009588] [2024-11-12 13:13:21,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312009588] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 13:13:21,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 13:13:21,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-12 13:13:21,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275991619] [2024-11-12 13:13:21,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 13:13:21,498 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 13:13:21,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:13:21,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 13:13:21,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-12 13:13:21,499 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:21,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:13:21,529 INFO L93 Difference]: Finished difference Result 71 states and 83 transitions. [2024-11-12 13:13:21,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-12 13:13:21,530 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-11-12 13:13:21,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:13:21,531 INFO L225 Difference]: With dead ends: 71 [2024-11-12 13:13:21,531 INFO L226 Difference]: Without dead ends: 71 [2024-11-12 13:13:21,533 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-12 13:13:21,534 INFO L435 NwaCegarLoop]: 52 mSDtfsCounter, 10 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-12 13:13:21,534 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 109 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-12 13:13:21,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-11-12 13:13:21,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 65. [2024-11-12 13:13:21,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 48 states have (on average 1.6041666666666667) internal successors, (77), 64 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:21,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 77 transitions. [2024-11-12 13:13:21,546 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 77 transitions. Word has length 9 [2024-11-12 13:13:21,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:13:21,547 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 77 transitions. [2024-11-12 13:13:21,547 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:21,547 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 77 transitions. [2024-11-12 13:13:21,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-12 13:13:21,548 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:13:21,548 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:13:21,548 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-12 13:13:21,549 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-12 13:13:21,549 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:13:21,549 INFO L85 PathProgramCache]: Analyzing trace with hash -476618606, now seen corresponding path program 1 times [2024-11-12 13:13:21,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:13:21,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890782778] [2024-11-12 13:13:21,550 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:13:21,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:13:21,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:13:21,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:13:21,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:13:21,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890782778] [2024-11-12 13:13:21,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890782778] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 13:13:21,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 13:13:21,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-12 13:13:21,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769058205] [2024-11-12 13:13:21,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 13:13:21,609 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 13:13:21,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:13:21,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 13:13:21,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 13:13:21,611 INFO L87 Difference]: Start difference. First operand 65 states and 77 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:21,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:13:21,656 INFO L93 Difference]: Finished difference Result 63 states and 75 transitions. [2024-11-12 13:13:21,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 13:13:21,657 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-11-12 13:13:21,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:13:21,657 INFO L225 Difference]: With dead ends: 63 [2024-11-12 13:13:21,658 INFO L226 Difference]: Without dead ends: 63 [2024-11-12 13:13:21,658 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 13:13:21,660 INFO L435 NwaCegarLoop]: 47 mSDtfsCounter, 13 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-12 13:13:21,663 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 67 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-12 13:13:21,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-11-12 13:13:21,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2024-11-12 13:13:21,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 48 states have (on average 1.5625) internal successors, (75), 62 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:21,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 75 transitions. [2024-11-12 13:13:21,668 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 75 transitions. Word has length 9 [2024-11-12 13:13:21,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:13:21,672 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 75 transitions. [2024-11-12 13:13:21,673 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:21,673 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 75 transitions. [2024-11-12 13:13:21,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-12 13:13:21,673 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:13:21,673 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:13:21,673 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-12 13:13:21,674 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-12 13:13:21,674 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:13:21,674 INFO L85 PathProgramCache]: Analyzing trace with hash -476618605, now seen corresponding path program 1 times [2024-11-12 13:13:21,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:13:21,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357062808] [2024-11-12 13:13:21,675 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:13:21,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:13:21,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:13:21,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:13:21,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:13:21,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357062808] [2024-11-12 13:13:21,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357062808] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 13:13:21,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 13:13:21,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-12 13:13:21,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741891374] [2024-11-12 13:13:21,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 13:13:21,834 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-12 13:13:21,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:13:21,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-12 13:13:21,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-12 13:13:21,837 INFO L87 Difference]: Start difference. First operand 63 states and 75 transitions. Second operand has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:21,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:13:21,936 INFO L93 Difference]: Finished difference Result 67 states and 80 transitions. [2024-11-12 13:13:21,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-12 13:13:21,937 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-11-12 13:13:21,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:13:21,937 INFO L225 Difference]: With dead ends: 67 [2024-11-12 13:13:21,939 INFO L226 Difference]: Without dead ends: 67 [2024-11-12 13:13:21,940 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-11-12 13:13:21,940 INFO L435 NwaCegarLoop]: 40 mSDtfsCounter, 37 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-12 13:13:21,944 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 124 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-12 13:13:21,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-11-12 13:13:21,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2024-11-12 13:13:21,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 50 states have (on average 1.56) internal successors, (78), 64 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:21,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 78 transitions. [2024-11-12 13:13:21,952 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 78 transitions. Word has length 9 [2024-11-12 13:13:21,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:13:21,952 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 78 transitions. [2024-11-12 13:13:21,952 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:21,953 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 78 transitions. [2024-11-12 13:13:21,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-12 13:13:21,953 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:13:21,953 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:13:21,954 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-12 13:13:21,954 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-12 13:13:21,954 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:13:21,955 INFO L85 PathProgramCache]: Analyzing trace with hash 629683416, now seen corresponding path program 1 times [2024-11-12 13:13:21,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:13:21,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891416818] [2024-11-12 13:13:21,955 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:13:21,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:13:21,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:13:22,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:13:22,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:13:22,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891416818] [2024-11-12 13:13:22,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891416818] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 13:13:22,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 13:13:22,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 13:13:22,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995402435] [2024-11-12 13:13:22,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 13:13:22,168 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 13:13:22,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:13:22,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 13:13:22,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-12 13:13:22,169 INFO L87 Difference]: Start difference. First operand 65 states and 78 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:22,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:13:22,191 INFO L93 Difference]: Finished difference Result 77 states and 92 transitions. [2024-11-12 13:13:22,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-12 13:13:22,192 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-11-12 13:13:22,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:13:22,192 INFO L225 Difference]: With dead ends: 77 [2024-11-12 13:13:22,193 INFO L226 Difference]: Without dead ends: 77 [2024-11-12 13:13:22,194 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-12 13:13:22,195 INFO L435 NwaCegarLoop]: 49 mSDtfsCounter, 11 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-12 13:13:22,195 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 97 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-12 13:13:22,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-11-12 13:13:22,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2024-11-12 13:13:22,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 61 states have (on average 1.5081967213114753) internal successors, (92), 75 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:22,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 92 transitions. [2024-11-12 13:13:22,204 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 92 transitions. Word has length 10 [2024-11-12 13:13:22,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:13:22,204 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 92 transitions. [2024-11-12 13:13:22,204 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:22,206 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 92 transitions. [2024-11-12 13:13:22,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-12 13:13:22,207 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:13:22,207 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:13:22,207 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-12 13:13:22,207 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-12 13:13:22,207 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:13:22,207 INFO L85 PathProgramCache]: Analyzing trace with hash -179663210, now seen corresponding path program 1 times [2024-11-12 13:13:22,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:13:22,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982933358] [2024-11-12 13:13:22,208 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:13:22,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:13:22,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:13:22,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:13:22,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:13:22,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982933358] [2024-11-12 13:13:22,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982933358] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 13:13:22,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 13:13:22,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-12 13:13:22,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539903204] [2024-11-12 13:13:22,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 13:13:22,381 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 13:13:22,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:13:22,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 13:13:22,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-12 13:13:22,382 INFO L87 Difference]: Start difference. First operand 76 states and 92 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:22,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:13:22,453 INFO L93 Difference]: Finished difference Result 92 states and 110 transitions. [2024-11-12 13:13:22,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 13:13:22,454 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-11-12 13:13:22,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:13:22,455 INFO L225 Difference]: With dead ends: 92 [2024-11-12 13:13:22,455 INFO L226 Difference]: Without dead ends: 92 [2024-11-12 13:13:22,455 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-12 13:13:22,456 INFO L435 NwaCegarLoop]: 45 mSDtfsCounter, 27 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-12 13:13:22,457 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 113 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-12 13:13:22,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-11-12 13:13:22,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 76. [2024-11-12 13:13:22,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 61 states have (on average 1.5081967213114753) internal successors, (92), 75 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:22,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 92 transitions. [2024-11-12 13:13:22,462 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 92 transitions. Word has length 10 [2024-11-12 13:13:22,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:13:22,465 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 92 transitions. [2024-11-12 13:13:22,466 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:22,466 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 92 transitions. [2024-11-12 13:13:22,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-12 13:13:22,466 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:13:22,466 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:13:22,466 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-12 13:13:22,467 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-12 13:13:22,467 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:13:22,467 INFO L85 PathProgramCache]: Analyzing trace with hash -1954650589, now seen corresponding path program 1 times [2024-11-12 13:13:22,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:13:22,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124915862] [2024-11-12 13:13:22,467 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:13:22,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:13:22,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:13:22,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:13:22,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:13:22,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124915862] [2024-11-12 13:13:22,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124915862] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 13:13:22,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 13:13:22,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 13:13:22,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301226648] [2024-11-12 13:13:22,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 13:13:22,584 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 13:13:22,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:13:22,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 13:13:22,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-12 13:13:22,585 INFO L87 Difference]: Start difference. First operand 76 states and 92 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:22,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:13:22,632 INFO L93 Difference]: Finished difference Result 83 states and 98 transitions. [2024-11-12 13:13:22,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-12 13:13:22,633 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-11-12 13:13:22,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:13:22,634 INFO L225 Difference]: With dead ends: 83 [2024-11-12 13:13:22,634 INFO L226 Difference]: Without dead ends: 83 [2024-11-12 13:13:22,634 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-12 13:13:22,635 INFO L435 NwaCegarLoop]: 47 mSDtfsCounter, 6 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-12 13:13:22,635 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 122 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-12 13:13:22,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2024-11-12 13:13:22,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 81. [2024-11-12 13:13:22,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 66 states have (on average 1.4848484848484849) internal successors, (98), 80 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:22,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 98 transitions. [2024-11-12 13:13:22,644 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 98 transitions. Word has length 11 [2024-11-12 13:13:22,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:13:22,644 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 98 transitions. [2024-11-12 13:13:22,644 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:22,644 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 98 transitions. [2024-11-12 13:13:22,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-12 13:13:22,645 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:13:22,645 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:13:22,645 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-12 13:13:22,645 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-12 13:13:22,646 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:13:22,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1530970081, now seen corresponding path program 1 times [2024-11-12 13:13:22,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:13:22,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376272002] [2024-11-12 13:13:22,646 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:13:22,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:13:22,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:13:22,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:13:22,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:13:22,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376272002] [2024-11-12 13:13:22,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376272002] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 13:13:22,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 13:13:22,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-12 13:13:22,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942604061] [2024-11-12 13:13:22,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 13:13:22,760 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 13:13:22,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:13:22,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 13:13:22,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-12 13:13:22,762 INFO L87 Difference]: Start difference. First operand 81 states and 98 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:22,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:13:22,784 INFO L93 Difference]: Finished difference Result 80 states and 97 transitions. [2024-11-12 13:13:22,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 13:13:22,785 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-11-12 13:13:22,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:13:22,785 INFO L225 Difference]: With dead ends: 80 [2024-11-12 13:13:22,785 INFO L226 Difference]: Without dead ends: 80 [2024-11-12 13:13:22,786 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-12 13:13:22,786 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 22 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-12 13:13:22,787 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 103 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-12 13:13:22,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2024-11-12 13:13:22,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 75. [2024-11-12 13:13:22,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 61 states have (on average 1.4918032786885247) internal successors, (91), 74 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:22,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 91 transitions. [2024-11-12 13:13:22,791 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 91 transitions. Word has length 11 [2024-11-12 13:13:22,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:13:22,791 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 91 transitions. [2024-11-12 13:13:22,791 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:22,791 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 91 transitions. [2024-11-12 13:13:22,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-12 13:13:22,792 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:13:22,792 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:13:22,792 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-12 13:13:22,792 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-12 13:13:22,792 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:13:22,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1226025170, now seen corresponding path program 1 times [2024-11-12 13:13:22,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:13:22,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700773025] [2024-11-12 13:13:22,793 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:13:22,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:13:22,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:13:22,996 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:13:22,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:13:22,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700773025] [2024-11-12 13:13:22,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700773025] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 13:13:22,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257573257] [2024-11-12 13:13:22,997 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:13:22,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:13:22,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 13:13:23,000 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 13:13:23,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-12 13:13:23,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:13:23,068 INFO L256 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-12 13:13:23,079 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 13:13:23,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-12 13:13:23,161 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2024-11-12 13:13:23,170 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-12 13:13:23,336 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:13:23,336 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 13:13:23,517 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-12 13:13:23,538 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:13:23,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257573257] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 13:13:23,539 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 13:13:23,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-11-12 13:13:23,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29616080] [2024-11-12 13:13:23,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 13:13:23,539 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-12 13:13:23,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:13:23,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-12 13:13:23,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2024-11-12 13:13:23,540 INFO L87 Difference]: Start difference. First operand 75 states and 91 transitions. Second operand has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:23,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:13:23,714 INFO L93 Difference]: Finished difference Result 80 states and 97 transitions. [2024-11-12 13:13:23,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-12 13:13:23,715 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-11-12 13:13:23,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:13:23,715 INFO L225 Difference]: With dead ends: 80 [2024-11-12 13:13:23,715 INFO L226 Difference]: Without dead ends: 80 [2024-11-12 13:13:23,716 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2024-11-12 13:13:23,716 INFO L435 NwaCegarLoop]: 44 mSDtfsCounter, 20 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-12 13:13:23,717 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 196 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-12 13:13:23,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2024-11-12 13:13:23,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 72. [2024-11-12 13:13:23,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 59 states have (on average 1.4745762711864407) internal successors, (87), 71 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:23,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 87 transitions. [2024-11-12 13:13:23,720 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 87 transitions. Word has length 11 [2024-11-12 13:13:23,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:13:23,720 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 87 transitions. [2024-11-12 13:13:23,720 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:23,720 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 87 transitions. [2024-11-12 13:13:23,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-12 13:13:23,721 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:13:23,721 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:13:23,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-12 13:13:23,925 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-12 13:13:23,926 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-12 13:13:23,926 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:13:23,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1518507737, now seen corresponding path program 1 times [2024-11-12 13:13:23,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:13:23,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281482725] [2024-11-12 13:13:23,927 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:13:23,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:13:23,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:13:23,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:13:23,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:13:23,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281482725] [2024-11-12 13:13:23,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281482725] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 13:13:23,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 13:13:23,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 13:13:23,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537672869] [2024-11-12 13:13:23,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 13:13:23,971 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 13:13:23,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:13:23,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 13:13:23,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-12 13:13:23,972 INFO L87 Difference]: Start difference. First operand 72 states and 87 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:24,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:13:24,012 INFO L93 Difference]: Finished difference Result 70 states and 85 transitions. [2024-11-12 13:13:24,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-12 13:13:24,013 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-11-12 13:13:24,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:13:24,013 INFO L225 Difference]: With dead ends: 70 [2024-11-12 13:13:24,013 INFO L226 Difference]: Without dead ends: 70 [2024-11-12 13:13:24,014 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-12 13:13:24,014 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 34 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-12 13:13:24,014 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 64 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-12 13:13:24,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-11-12 13:13:24,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2024-11-12 13:13:24,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 59 states have (on average 1.4406779661016949) internal successors, (85), 69 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:24,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 85 transitions. [2024-11-12 13:13:24,022 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 85 transitions. Word has length 13 [2024-11-12 13:13:24,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:13:24,022 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 85 transitions. [2024-11-12 13:13:24,022 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:24,022 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 85 transitions. [2024-11-12 13:13:24,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-12 13:13:24,023 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:13:24,023 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:13:24,023 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-12 13:13:24,023 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-12 13:13:24,023 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:13:24,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1518507736, now seen corresponding path program 1 times [2024-11-12 13:13:24,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:13:24,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575095113] [2024-11-12 13:13:24,024 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:13:24,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:13:24,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:13:24,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:13:24,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:13:24,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575095113] [2024-11-12 13:13:24,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575095113] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 13:13:24,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 13:13:24,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-12 13:13:24,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096260164] [2024-11-12 13:13:24,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 13:13:24,129 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-12 13:13:24,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:13:24,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-12 13:13:24,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-12 13:13:24,130 INFO L87 Difference]: Start difference. First operand 70 states and 85 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:24,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:13:24,219 INFO L93 Difference]: Finished difference Result 92 states and 110 transitions. [2024-11-12 13:13:24,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-12 13:13:24,220 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-11-12 13:13:24,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:13:24,220 INFO L225 Difference]: With dead ends: 92 [2024-11-12 13:13:24,220 INFO L226 Difference]: Without dead ends: 92 [2024-11-12 13:13:24,221 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-12 13:13:24,221 INFO L435 NwaCegarLoop]: 40 mSDtfsCounter, 43 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-12 13:13:24,222 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 141 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-12 13:13:24,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-11-12 13:13:24,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 80. [2024-11-12 13:13:24,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 69 states have (on average 1.4782608695652173) internal successors, (102), 79 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:24,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 102 transitions. [2024-11-12 13:13:24,224 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 102 transitions. Word has length 13 [2024-11-12 13:13:24,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:13:24,224 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 102 transitions. [2024-11-12 13:13:24,224 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:24,225 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 102 transitions. [2024-11-12 13:13:24,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-12 13:13:24,225 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:13:24,225 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:13:24,225 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-12 13:13:24,226 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-12 13:13:24,226 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:13:24,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1862804906, now seen corresponding path program 1 times [2024-11-12 13:13:24,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:13:24,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253405276] [2024-11-12 13:13:24,227 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:13:24,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:13:24,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:13:24,409 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:13:24,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:13:24,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253405276] [2024-11-12 13:13:24,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253405276] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 13:13:24,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661428236] [2024-11-12 13:13:24,410 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:13:24,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:13:24,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 13:13:24,412 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 13:13:24,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-12 13:13:24,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:13:24,475 INFO L256 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-12 13:13:24,478 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 13:13:24,500 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-11-12 13:13:24,511 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-12 13:13:24,687 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:13:24,688 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 13:13:24,857 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:13:24,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661428236] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 13:13:24,858 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 13:13:24,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2024-11-12 13:13:24,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708525413] [2024-11-12 13:13:24,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 13:13:24,859 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-12 13:13:24,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:13:24,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-12 13:13:24,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2024-11-12 13:13:24,860 INFO L87 Difference]: Start difference. First operand 80 states and 102 transitions. Second operand has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:25,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:13:25,071 INFO L93 Difference]: Finished difference Result 85 states and 108 transitions. [2024-11-12 13:13:25,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-12 13:13:25,072 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-11-12 13:13:25,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:13:25,073 INFO L225 Difference]: With dead ends: 85 [2024-11-12 13:13:25,073 INFO L226 Difference]: Without dead ends: 85 [2024-11-12 13:13:25,074 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2024-11-12 13:13:25,074 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 18 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-12 13:13:25,074 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 208 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-12 13:13:25,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2024-11-12 13:13:25,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 75. [2024-11-12 13:13:25,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 65 states have (on average 1.4461538461538461) internal successors, (94), 74 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:25,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 94 transitions. [2024-11-12 13:13:25,077 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 94 transitions. Word has length 13 [2024-11-12 13:13:25,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:13:25,078 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 94 transitions. [2024-11-12 13:13:25,078 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:25,078 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 94 transitions. [2024-11-12 13:13:25,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-12 13:13:25,079 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:13:25,079 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:13:25,098 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-12 13:13:25,279 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-12 13:13:25,280 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-12 13:13:25,280 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:13:25,280 INFO L85 PathProgramCache]: Analyzing trace with hash -115553677, now seen corresponding path program 1 times [2024-11-12 13:13:25,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:13:25,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154946165] [2024-11-12 13:13:25,281 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:13:25,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:13:25,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:13:25,455 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:13:25,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:13:25,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154946165] [2024-11-12 13:13:25,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154946165] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 13:13:25,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 13:13:25,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-12 13:13:25,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547007134] [2024-11-12 13:13:25,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 13:13:25,456 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-12 13:13:25,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:13:25,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-12 13:13:25,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-12 13:13:25,457 INFO L87 Difference]: Start difference. First operand 75 states and 94 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:25,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:13:25,498 INFO L93 Difference]: Finished difference Result 74 states and 93 transitions. [2024-11-12 13:13:25,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-12 13:13:25,499 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-11-12 13:13:25,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:13:25,500 INFO L225 Difference]: With dead ends: 74 [2024-11-12 13:13:25,500 INFO L226 Difference]: Without dead ends: 74 [2024-11-12 13:13:25,500 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-12 13:13:25,501 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 10 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-12 13:13:25,501 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 92 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-12 13:13:25,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-11-12 13:13:25,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 63. [2024-11-12 13:13:25,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 54 states have (on average 1.462962962962963) internal successors, (79), 62 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:25,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 79 transitions. [2024-11-12 13:13:25,503 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 79 transitions. Word has length 14 [2024-11-12 13:13:25,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:13:25,503 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 79 transitions. [2024-11-12 13:13:25,503 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:25,503 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 79 transitions. [2024-11-12 13:13:25,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-12 13:13:25,504 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:13:25,504 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:13:25,504 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-12 13:13:25,504 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-12 13:13:25,505 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:13:25,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1026571646, now seen corresponding path program 1 times [2024-11-12 13:13:25,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:13:25,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486825968] [2024-11-12 13:13:25,505 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:13:25,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:13:25,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:13:25,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:13:25,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:13:25,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486825968] [2024-11-12 13:13:25,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486825968] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 13:13:25,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 13:13:25,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 13:13:25,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469716344] [2024-11-12 13:13:25,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 13:13:25,539 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 13:13:25,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:13:25,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 13:13:25,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-12 13:13:25,540 INFO L87 Difference]: Start difference. First operand 63 states and 79 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:25,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:13:25,573 INFO L93 Difference]: Finished difference Result 60 states and 74 transitions. [2024-11-12 13:13:25,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-12 13:13:25,573 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2024-11-12 13:13:25,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:13:25,574 INFO L225 Difference]: With dead ends: 60 [2024-11-12 13:13:25,574 INFO L226 Difference]: Without dead ends: 60 [2024-11-12 13:13:25,574 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-12 13:13:25,574 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 24 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-12 13:13:25,575 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 63 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-12 13:13:25,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-11-12 13:13:25,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2024-11-12 13:13:25,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 54 states have (on average 1.3703703703703705) internal successors, (74), 59 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:25,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 74 transitions. [2024-11-12 13:13:25,577 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 74 transitions. Word has length 16 [2024-11-12 13:13:25,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:13:25,577 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 74 transitions. [2024-11-12 13:13:25,577 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:25,577 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 74 transitions. [2024-11-12 13:13:25,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-12 13:13:25,577 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:13:25,578 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:13:25,578 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-12 13:13:25,578 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-12 13:13:25,578 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:13:25,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1026571647, now seen corresponding path program 1 times [2024-11-12 13:13:25,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:13:25,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202080219] [2024-11-12 13:13:25,579 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:13:25,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:13:25,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:13:25,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:13:25,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:13:25,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202080219] [2024-11-12 13:13:25,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202080219] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 13:13:25,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 13:13:25,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-12 13:13:25,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628797522] [2024-11-12 13:13:25,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 13:13:25,761 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-12 13:13:25,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:13:25,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-12 13:13:25,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-12 13:13:25,762 INFO L87 Difference]: Start difference. First operand 60 states and 74 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:25,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:13:25,833 INFO L93 Difference]: Finished difference Result 77 states and 95 transitions. [2024-11-12 13:13:25,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-12 13:13:25,833 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2024-11-12 13:13:25,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:13:25,834 INFO L225 Difference]: With dead ends: 77 [2024-11-12 13:13:25,834 INFO L226 Difference]: Without dead ends: 77 [2024-11-12 13:13:25,834 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-12 13:13:25,834 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 23 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-12 13:13:25,835 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 123 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-12 13:13:25,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-11-12 13:13:25,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 69. [2024-11-12 13:13:25,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 63 states have (on average 1.3492063492063493) internal successors, (85), 68 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:25,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 85 transitions. [2024-11-12 13:13:25,837 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 85 transitions. Word has length 16 [2024-11-12 13:13:25,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:13:25,837 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 85 transitions. [2024-11-12 13:13:25,837 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:25,837 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 85 transitions. [2024-11-12 13:13:25,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-12 13:13:25,838 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:13:25,838 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:13:25,838 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-12 13:13:25,838 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-12 13:13:25,838 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:13:25,839 INFO L85 PathProgramCache]: Analyzing trace with hash -1835713881, now seen corresponding path program 1 times [2024-11-12 13:13:25,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:13:25,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114047999] [2024-11-12 13:13:25,839 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:13:25,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:13:25,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:13:25,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:13:25,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:13:25,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114047999] [2024-11-12 13:13:25,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114047999] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 13:13:25,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 13:13:25,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 13:13:25,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592235507] [2024-11-12 13:13:25,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 13:13:25,951 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 13:13:25,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:13:25,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 13:13:25,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-12 13:13:25,952 INFO L87 Difference]: Start difference. First operand 69 states and 85 transitions. Second operand has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:25,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:13:25,975 INFO L93 Difference]: Finished difference Result 68 states and 84 transitions. [2024-11-12 13:13:25,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-12 13:13:25,976 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2024-11-12 13:13:25,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:13:25,976 INFO L225 Difference]: With dead ends: 68 [2024-11-12 13:13:25,976 INFO L226 Difference]: Without dead ends: 64 [2024-11-12 13:13:25,976 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-12 13:13:25,978 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 25 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-12 13:13:25,978 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 64 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-12 13:13:25,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-11-12 13:13:25,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2024-11-12 13:13:25,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 59 states have (on average 1.3220338983050848) internal successors, (78), 63 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:25,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 78 transitions. [2024-11-12 13:13:25,980 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 78 transitions. Word has length 20 [2024-11-12 13:13:25,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:13:25,980 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 78 transitions. [2024-11-12 13:13:25,980 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:25,980 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 78 transitions. [2024-11-12 13:13:25,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-12 13:13:25,981 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:13:25,981 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:13:25,981 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-12 13:13:25,981 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-12 13:13:25,981 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:13:25,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1030626472, now seen corresponding path program 1 times [2024-11-12 13:13:25,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:13:25,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210326175] [2024-11-12 13:13:25,982 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:13:25,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:13:25,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:13:26,012 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:13:26,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:13:26,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210326175] [2024-11-12 13:13:26,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210326175] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 13:13:26,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 13:13:26,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 13:13:26,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791039332] [2024-11-12 13:13:26,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 13:13:26,014 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 13:13:26,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:13:26,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 13:13:26,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 13:13:26,015 INFO L87 Difference]: Start difference. First operand 64 states and 78 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:26,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:13:26,023 INFO L93 Difference]: Finished difference Result 67 states and 80 transitions. [2024-11-12 13:13:26,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 13:13:26,023 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2024-11-12 13:13:26,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:13:26,024 INFO L225 Difference]: With dead ends: 67 [2024-11-12 13:13:26,024 INFO L226 Difference]: Without dead ends: 66 [2024-11-12 13:13:26,024 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 13:13:26,024 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 0 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-12 13:13:26,025 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 72 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-12 13:13:26,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-11-12 13:13:26,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2024-11-12 13:13:26,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.3) internal successors, (78), 64 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:26,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 78 transitions. [2024-11-12 13:13:26,026 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 78 transitions. Word has length 21 [2024-11-12 13:13:26,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:13:26,027 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 78 transitions. [2024-11-12 13:13:26,027 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:26,027 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 78 transitions. [2024-11-12 13:13:26,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-12 13:13:26,028 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:13:26,028 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:13:26,029 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-12 13:13:26,029 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-12 13:13:26,029 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:13:26,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1845558251, now seen corresponding path program 1 times [2024-11-12 13:13:26,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:13:26,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977626897] [2024-11-12 13:13:26,030 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:13:26,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:13:26,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:13:26,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:13:26,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:13:26,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977626897] [2024-11-12 13:13:26,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977626897] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 13:13:26,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 13:13:26,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-12 13:13:26,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326681567] [2024-11-12 13:13:26,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 13:13:26,174 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-12 13:13:26,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:13:26,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-12 13:13:26,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-11-12 13:13:26,174 INFO L87 Difference]: Start difference. First operand 65 states and 78 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:26,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:13:26,236 INFO L93 Difference]: Finished difference Result 79 states and 92 transitions. [2024-11-12 13:13:26,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-12 13:13:26,236 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2024-11-12 13:13:26,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:13:26,237 INFO L225 Difference]: With dead ends: 79 [2024-11-12 13:13:26,237 INFO L226 Difference]: Without dead ends: 60 [2024-11-12 13:13:26,237 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-11-12 13:13:26,238 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 7 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-12 13:13:26,238 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 210 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-12 13:13:26,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-11-12 13:13:26,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2024-11-12 13:13:26,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 55 states have (on average 1.290909090909091) internal successors, (71), 59 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:26,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 71 transitions. [2024-11-12 13:13:26,240 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 71 transitions. Word has length 23 [2024-11-12 13:13:26,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:13:26,240 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 71 transitions. [2024-11-12 13:13:26,241 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:26,241 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 71 transitions. [2024-11-12 13:13:26,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-12 13:13:26,241 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:13:26,241 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:13:26,241 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-12 13:13:26,242 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-12 13:13:26,242 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:13:26,242 INFO L85 PathProgramCache]: Analyzing trace with hash -1422856425, now seen corresponding path program 1 times [2024-11-12 13:13:26,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:13:26,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809607048] [2024-11-12 13:13:26,243 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:13:26,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:13:26,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:13:26,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:13:26,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:13:26,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809607048] [2024-11-12 13:13:26,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809607048] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 13:13:26,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 13:13:26,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-12 13:13:26,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711486487] [2024-11-12 13:13:26,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 13:13:26,432 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-12 13:13:26,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:13:26,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-12 13:13:26,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-11-12 13:13:26,433 INFO L87 Difference]: Start difference. First operand 60 states and 71 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:26,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:13:26,513 INFO L93 Difference]: Finished difference Result 82 states and 95 transitions. [2024-11-12 13:13:26,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-12 13:13:26,514 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2024-11-12 13:13:26,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:13:26,515 INFO L225 Difference]: With dead ends: 82 [2024-11-12 13:13:26,515 INFO L226 Difference]: Without dead ends: 68 [2024-11-12 13:13:26,515 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-11-12 13:13:26,516 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 27 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-12 13:13:26,517 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 179 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-12 13:13:26,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-11-12 13:13:26,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 62. [2024-11-12 13:13:26,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 57 states have (on average 1.280701754385965) internal successors, (73), 61 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:26,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 73 transitions. [2024-11-12 13:13:26,519 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 73 transitions. Word has length 23 [2024-11-12 13:13:26,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:13:26,519 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 73 transitions. [2024-11-12 13:13:26,519 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:26,519 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 73 transitions. [2024-11-12 13:13:26,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-12 13:13:26,519 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:13:26,519 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:13:26,520 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-11-12 13:13:26,520 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-12 13:13:26,520 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:13:26,520 INFO L85 PathProgramCache]: Analyzing trace with hash 109945434, now seen corresponding path program 1 times [2024-11-12 13:13:26,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:13:26,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666076595] [2024-11-12 13:13:26,520 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:13:26,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:13:26,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:13:26,675 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:13:26,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:13:26,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666076595] [2024-11-12 13:13:26,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666076595] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 13:13:26,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740989471] [2024-11-12 13:13:26,676 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:13:26,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:13:26,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 13:13:26,678 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 13:13:26,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-12 13:13:26,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:13:26,760 INFO L256 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-12 13:13:26,762 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 13:13:26,865 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:13:26,865 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 13:13:26,983 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-12 13:13:27,009 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:13:27,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740989471] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 13:13:27,009 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 13:13:27,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2024-11-12 13:13:27,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608054530] [2024-11-12 13:13:27,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 13:13:27,010 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-12 13:13:27,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:13:27,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-12 13:13:27,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2024-11-12 13:13:27,011 INFO L87 Difference]: Start difference. First operand 62 states and 73 transitions. Second operand has 17 states, 16 states have (on average 3.875) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:27,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:13:27,175 INFO L93 Difference]: Finished difference Result 89 states and 99 transitions. [2024-11-12 13:13:27,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-12 13:13:27,176 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.875) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2024-11-12 13:13:27,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:13:27,176 INFO L225 Difference]: With dead ends: 89 [2024-11-12 13:13:27,176 INFO L226 Difference]: Without dead ends: 89 [2024-11-12 13:13:27,177 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2024-11-12 13:13:27,177 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 45 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-12 13:13:27,179 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 273 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-12 13:13:27,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2024-11-12 13:13:27,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 63. [2024-11-12 13:13:27,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 59 states have (on average 1.2542372881355932) internal successors, (74), 62 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:27,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 74 transitions. [2024-11-12 13:13:27,181 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 74 transitions. Word has length 27 [2024-11-12 13:13:27,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:13:27,182 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 74 transitions. [2024-11-12 13:13:27,182 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.875) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:27,182 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 74 transitions. [2024-11-12 13:13:27,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-12 13:13:27,183 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:13:27,183 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:13:27,200 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-12 13:13:27,386 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:13:27,387 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-12 13:13:27,387 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:13:27,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1675616499, now seen corresponding path program 1 times [2024-11-12 13:13:27,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:13:27,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844528640] [2024-11-12 13:13:27,388 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:13:27,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:13:27,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:13:27,617 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 13:13:27,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:13:27,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844528640] [2024-11-12 13:13:27,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844528640] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 13:13:27,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 13:13:27,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-11-12 13:13:27,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70475179] [2024-11-12 13:13:27,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 13:13:27,619 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-12 13:13:27,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:13:27,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-12 13:13:27,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-11-12 13:13:27,619 INFO L87 Difference]: Start difference. First operand 63 states and 74 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:27,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:13:27,744 INFO L93 Difference]: Finished difference Result 77 states and 88 transitions. [2024-11-12 13:13:27,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-12 13:13:27,745 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2024-11-12 13:13:27,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:13:27,745 INFO L225 Difference]: With dead ends: 77 [2024-11-12 13:13:27,745 INFO L226 Difference]: Without dead ends: 77 [2024-11-12 13:13:27,746 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2024-11-12 13:13:27,746 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 15 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-12 13:13:27,746 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 176 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-12 13:13:27,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-11-12 13:13:27,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2024-11-12 13:13:27,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 72 states have (on average 1.2083333333333333) internal successors, (87), 75 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:27,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 87 transitions. [2024-11-12 13:13:27,748 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 87 transitions. Word has length 30 [2024-11-12 13:13:27,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:13:27,749 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 87 transitions. [2024-11-12 13:13:27,749 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:27,749 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 87 transitions. [2024-11-12 13:13:27,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-12 13:13:27,749 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:13:27,749 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:13:27,750 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-11-12 13:13:27,750 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-12 13:13:27,750 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:13:27,750 INFO L85 PathProgramCache]: Analyzing trace with hash -1618358197, now seen corresponding path program 1 times [2024-11-12 13:13:27,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:13:27,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054409286] [2024-11-12 13:13:27,750 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:13:27,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:13:27,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:13:27,915 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 13:13:27,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:13:27,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054409286] [2024-11-12 13:13:27,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054409286] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 13:13:27,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 13:13:27,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-12 13:13:27,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600426467] [2024-11-12 13:13:27,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 13:13:27,917 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-12 13:13:27,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:13:27,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-12 13:13:27,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-11-12 13:13:27,918 INFO L87 Difference]: Start difference. First operand 76 states and 87 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:27,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:13:27,978 INFO L93 Difference]: Finished difference Result 73 states and 83 transitions. [2024-11-12 13:13:27,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-12 13:13:27,978 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2024-11-12 13:13:27,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:13:27,979 INFO L225 Difference]: With dead ends: 73 [2024-11-12 13:13:27,979 INFO L226 Difference]: Without dead ends: 55 [2024-11-12 13:13:27,979 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-11-12 13:13:27,980 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 2 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-12 13:13:27,980 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 195 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-12 13:13:27,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-11-12 13:13:27,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2024-11-12 13:13:27,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 51 states have (on average 1.2549019607843137) internal successors, (64), 54 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:27,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2024-11-12 13:13:27,982 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 30 [2024-11-12 13:13:27,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:13:27,982 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2024-11-12 13:13:27,982 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:27,983 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2024-11-12 13:13:27,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-12 13:13:27,983 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:13:27,983 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:13:27,983 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-11-12 13:13:27,983 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-12 13:13:27,984 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:13:27,984 INFO L85 PathProgramCache]: Analyzing trace with hash 247611535, now seen corresponding path program 1 times [2024-11-12 13:13:27,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:13:27,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167344935] [2024-11-12 13:13:27,984 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:13:27,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:13:27,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:13:28,345 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 13:13:28,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:13:28,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167344935] [2024-11-12 13:13:28,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167344935] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 13:13:28,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706511869] [2024-11-12 13:13:28,346 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:13:28,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:13:28,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 13:13:28,348 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 13:13:28,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-12 13:13:28,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:13:28,434 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-12 13:13:28,436 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 13:13:28,518 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-12 13:13:28,628 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:13:28,628 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 13:13:28,663 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-12 13:13:28,666 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-12 13:13:28,736 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:13:28,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706511869] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 13:13:28,737 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 13:13:28,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 24 [2024-11-12 13:13:28,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694858009] [2024-11-12 13:13:28,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 13:13:28,737 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-12 13:13:28,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:13:28,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-12 13:13:28,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2024-11-12 13:13:28,738 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:29,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:13:29,519 INFO L93 Difference]: Finished difference Result 125 states and 140 transitions. [2024-11-12 13:13:29,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-11-12 13:13:29,520 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2024-11-12 13:13:29,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:13:29,520 INFO L225 Difference]: With dead ends: 125 [2024-11-12 13:13:29,520 INFO L226 Difference]: Without dead ends: 117 [2024-11-12 13:13:29,521 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=256, Invalid=2194, Unknown=0, NotChecked=0, Total=2450 [2024-11-12 13:13:29,522 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 115 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-12 13:13:29,522 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 302 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-12 13:13:29,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2024-11-12 13:13:29,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 101. [2024-11-12 13:13:29,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 97 states have (on average 1.2164948453608246) internal successors, (118), 100 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:29,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 118 transitions. [2024-11-12 13:13:29,524 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 118 transitions. Word has length 30 [2024-11-12 13:13:29,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:13:29,525 INFO L471 AbstractCegarLoop]: Abstraction has 101 states and 118 transitions. [2024-11-12 13:13:29,525 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:29,525 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 118 transitions. [2024-11-12 13:13:29,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-12 13:13:29,525 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:13:29,525 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:13:29,542 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-12 13:13:29,725 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:13:29,726 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-12 13:13:29,726 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:13:29,726 INFO L85 PathProgramCache]: Analyzing trace with hash 304869837, now seen corresponding path program 1 times [2024-11-12 13:13:29,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:13:29,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510001732] [2024-11-12 13:13:29,727 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:13:29,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:13:29,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:13:29,972 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 13:13:29,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:13:29,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510001732] [2024-11-12 13:13:29,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510001732] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 13:13:29,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 13:13:29,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-12 13:13:29,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415630742] [2024-11-12 13:13:29,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 13:13:29,973 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-12 13:13:29,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:13:29,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-12 13:13:29,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-12 13:13:29,975 INFO L87 Difference]: Start difference. First operand 101 states and 118 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:30,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:13:30,047 INFO L93 Difference]: Finished difference Result 129 states and 146 transitions. [2024-11-12 13:13:30,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-12 13:13:30,047 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2024-11-12 13:13:30,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:13:30,048 INFO L225 Difference]: With dead ends: 129 [2024-11-12 13:13:30,048 INFO L226 Difference]: Without dead ends: 109 [2024-11-12 13:13:30,049 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-11-12 13:13:30,049 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 18 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-12 13:13:30,051 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 177 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-12 13:13:30,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2024-11-12 13:13:30,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 103. [2024-11-12 13:13:30,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 99 states have (on average 1.2121212121212122) internal successors, (120), 102 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:30,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 120 transitions. [2024-11-12 13:13:30,054 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 120 transitions. Word has length 30 [2024-11-12 13:13:30,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:13:30,055 INFO L471 AbstractCegarLoop]: Abstraction has 103 states and 120 transitions. [2024-11-12 13:13:30,055 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:30,055 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 120 transitions. [2024-11-12 13:13:30,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-12 13:13:30,055 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:13:30,055 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:13:30,056 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-11-12 13:13:30,056 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-12 13:13:30,056 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:13:30,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1630343402, now seen corresponding path program 1 times [2024-11-12 13:13:30,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:13:30,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713613150] [2024-11-12 13:13:30,057 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:13:30,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:13:30,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:13:30,304 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 13:13:30,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:13:30,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713613150] [2024-11-12 13:13:30,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713613150] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 13:13:30,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631595578] [2024-11-12 13:13:30,305 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:13:30,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:13:30,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 13:13:30,307 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 13:13:30,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-12 13:13:30,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:13:30,395 INFO L256 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-12 13:13:30,397 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 13:13:30,491 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 13:13:30,492 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 13:13:30,601 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-12 13:13:30,625 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 13:13:30,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631595578] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 13:13:30,626 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 13:13:30,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 17 [2024-11-12 13:13:30,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659563941] [2024-11-12 13:13:30,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 13:13:30,626 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-12 13:13:30,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:13:30,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-12 13:13:30,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2024-11-12 13:13:30,627 INFO L87 Difference]: Start difference. First operand 103 states and 120 transitions. Second operand has 18 states, 17 states have (on average 4.470588235294118) internal successors, (76), 18 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:30,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:13:30,788 INFO L93 Difference]: Finished difference Result 137 states and 157 transitions. [2024-11-12 13:13:30,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-12 13:13:30,788 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 4.470588235294118) internal successors, (76), 18 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2024-11-12 13:13:30,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:13:30,789 INFO L225 Difference]: With dead ends: 137 [2024-11-12 13:13:30,789 INFO L226 Difference]: Without dead ends: 134 [2024-11-12 13:13:30,789 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2024-11-12 13:13:30,790 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 37 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-12 13:13:30,790 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 279 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-12 13:13:30,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2024-11-12 13:13:30,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 108. [2024-11-12 13:13:30,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 105 states have (on average 1.1428571428571428) internal successors, (120), 107 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:30,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 120 transitions. [2024-11-12 13:13:30,793 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 120 transitions. Word has length 34 [2024-11-12 13:13:30,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:13:30,793 INFO L471 AbstractCegarLoop]: Abstraction has 108 states and 120 transitions. [2024-11-12 13:13:30,793 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 4.470588235294118) internal successors, (76), 18 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:30,793 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 120 transitions. [2024-11-12 13:13:30,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-12 13:13:30,794 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:13:30,794 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:13:30,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-12 13:13:30,997 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-12 13:13:30,998 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-12 13:13:30,998 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:13:30,998 INFO L85 PathProgramCache]: Analyzing trace with hash -758277541, now seen corresponding path program 2 times [2024-11-12 13:13:30,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:13:30,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473889595] [2024-11-12 13:13:30,998 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:13:30,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:13:31,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:13:31,394 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 13:13:31,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:13:31,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473889595] [2024-11-12 13:13:31,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473889595] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 13:13:31,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111980747] [2024-11-12 13:13:31,395 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-12 13:13:31,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:13:31,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 13:13:31,397 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 13:13:31,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-12 13:13:31,492 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-12 13:13:31,492 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 13:13:31,495 INFO L256 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-12 13:13:31,497 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 13:13:31,560 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-12 13:13:31,613 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 13:13:31,613 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 13:13:31,646 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-12 13:13:31,649 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-12 13:13:31,701 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 13:13:31,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111980747] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 13:13:31,701 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 13:13:31,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 20 [2024-11-12 13:13:31,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066992211] [2024-11-12 13:13:31,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 13:13:31,702 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-12 13:13:31,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:13:31,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-12 13:13:31,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2024-11-12 13:13:31,703 INFO L87 Difference]: Start difference. First operand 108 states and 120 transitions. Second operand has 20 states, 20 states have (on average 3.75) internal successors, (75), 20 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:31,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:13:31,869 INFO L93 Difference]: Finished difference Result 169 states and 181 transitions. [2024-11-12 13:13:31,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-12 13:13:31,870 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.75) internal successors, (75), 20 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2024-11-12 13:13:31,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:13:31,871 INFO L225 Difference]: With dead ends: 169 [2024-11-12 13:13:31,871 INFO L226 Difference]: Without dead ends: 122 [2024-11-12 13:13:31,871 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2024-11-12 13:13:31,871 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 23 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-12 13:13:31,872 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 338 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-12 13:13:31,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2024-11-12 13:13:31,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 116. [2024-11-12 13:13:31,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 113 states have (on average 1.1327433628318584) internal successors, (128), 115 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:31,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 128 transitions. [2024-11-12 13:13:31,874 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 128 transitions. Word has length 44 [2024-11-12 13:13:31,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:13:31,874 INFO L471 AbstractCegarLoop]: Abstraction has 116 states and 128 transitions. [2024-11-12 13:13:31,875 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.75) internal successors, (75), 20 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:31,875 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 128 transitions. [2024-11-12 13:13:31,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-12 13:13:31,875 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:13:31,875 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:13:31,893 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-12 13:13:32,076 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-12 13:13:32,077 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-12 13:13:32,077 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:13:32,078 INFO L85 PathProgramCache]: Analyzing trace with hash 197624504, now seen corresponding path program 3 times [2024-11-12 13:13:32,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:13:32,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254463881] [2024-11-12 13:13:32,078 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:13:32,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:13:32,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:13:32,327 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 13:13:32,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:13:32,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254463881] [2024-11-12 13:13:32,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254463881] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 13:13:32,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151559830] [2024-11-12 13:13:32,328 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-12 13:13:32,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:13:32,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 13:13:32,330 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 13:13:32,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-12 13:13:32,443 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-12 13:13:32,443 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 13:13:32,444 INFO L256 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-12 13:13:32,447 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 13:13:32,453 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-12 13:13:32,600 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 13:13:32,601 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 13:13:32,866 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 13:13:32,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151559830] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 13:13:32,867 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 13:13:32,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2024-11-12 13:13:32,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313133417] [2024-11-12 13:13:32,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 13:13:32,868 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-12 13:13:32,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:13:32,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-12 13:13:32,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2024-11-12 13:13:32,869 INFO L87 Difference]: Start difference. First operand 116 states and 128 transitions. Second operand has 26 states, 25 states have (on average 5.2) internal successors, (130), 26 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) [2024-11-12 13:13:33,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:13:33,069 INFO L93 Difference]: Finished difference Result 175 states and 195 transitions. [2024-11-12 13:13:33,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-12 13:13:33,069 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 5.2) internal successors, (130), 26 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) Word has length 48 [2024-11-12 13:13:33,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:13:33,070 INFO L225 Difference]: With dead ends: 175 [2024-11-12 13:13:33,070 INFO L226 Difference]: Without dead ends: 169 [2024-11-12 13:13:33,070 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2024-11-12 13:13:33,071 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 32 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-12 13:13:33,071 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 352 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 333 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-12 13:13:33,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2024-11-12 13:13:33,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 148. [2024-11-12 13:13:33,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 145 states have (on average 1.1241379310344828) internal successors, (163), 147 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:33,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 163 transitions. [2024-11-12 13:13:33,076 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 163 transitions. Word has length 48 [2024-11-12 13:13:33,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:13:33,076 INFO L471 AbstractCegarLoop]: Abstraction has 148 states and 163 transitions. [2024-11-12 13:13:33,077 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 5.2) internal successors, (130), 26 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) [2024-11-12 13:13:33,077 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 163 transitions. [2024-11-12 13:13:33,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-12 13:13:33,077 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:13:33,077 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:13:33,095 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-12 13:13:33,281 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:13:33,282 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-12 13:13:33,282 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:13:33,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1690305038, now seen corresponding path program 1 times [2024-11-12 13:13:33,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:13:33,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017590222] [2024-11-12 13:13:33,282 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:13:33,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:13:33,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:13:33,524 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 13:13:33,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:13:33,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017590222] [2024-11-12 13:13:33,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017590222] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 13:13:33,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698955471] [2024-11-12 13:13:33,525 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:13:33,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:13:33,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 13:13:33,527 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 13:13:33,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-12 13:13:33,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:13:33,630 INFO L256 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-12 13:13:33,633 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 13:13:33,805 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 13:13:33,805 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 13:13:33,963 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-12 13:13:34,011 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 13:13:34,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698955471] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 13:13:34,012 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 13:13:34,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2024-11-12 13:13:34,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564286290] [2024-11-12 13:13:34,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 13:13:34,012 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-12 13:13:34,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:13:34,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-12 13:13:34,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2024-11-12 13:13:34,013 INFO L87 Difference]: Start difference. First operand 148 states and 163 transitions. Second operand has 20 states, 19 states have (on average 5.157894736842105) internal successors, (98), 20 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:34,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:13:34,232 INFO L93 Difference]: Finished difference Result 185 states and 199 transitions. [2024-11-12 13:13:34,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-12 13:13:34,232 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 5.157894736842105) internal successors, (98), 20 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2024-11-12 13:13:34,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:13:34,233 INFO L225 Difference]: With dead ends: 185 [2024-11-12 13:13:34,233 INFO L226 Difference]: Without dead ends: 185 [2024-11-12 13:13:34,233 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 83 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2024-11-12 13:13:34,234 INFO L435 NwaCegarLoop]: 58 mSDtfsCounter, 53 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-12 13:13:34,234 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 495 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 420 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-12 13:13:34,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2024-11-12 13:13:34,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 161. [2024-11-12 13:13:34,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 158 states have (on average 1.1265822784810127) internal successors, (178), 160 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:34,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 178 transitions. [2024-11-12 13:13:34,239 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 178 transitions. Word has length 49 [2024-11-12 13:13:34,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:13:34,239 INFO L471 AbstractCegarLoop]: Abstraction has 161 states and 178 transitions. [2024-11-12 13:13:34,240 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 5.157894736842105) internal successors, (98), 20 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:34,240 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 178 transitions. [2024-11-12 13:13:34,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-11-12 13:13:34,240 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:13:34,240 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:13:34,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-12 13:13:34,440 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:13:34,441 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-12 13:13:34,441 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:13:34,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1205248681, now seen corresponding path program 4 times [2024-11-12 13:13:34,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:13:34,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357564086] [2024-11-12 13:13:34,441 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:13:34,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:13:34,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:13:35,634 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 20 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:13:35,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:13:35,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357564086] [2024-11-12 13:13:35,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357564086] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 13:13:35,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823986680] [2024-11-12 13:13:35,634 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-12 13:13:35,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:13:35,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 13:13:35,637 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 13:13:35,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-12 13:13:35,741 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-12 13:13:35,742 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 13:13:35,743 INFO L256 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-12 13:13:35,746 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 13:13:35,911 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-11-12 13:13:36,748 INFO L349 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2024-11-12 13:13:36,748 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 26 [2024-11-12 13:13:36,754 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 38 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 13:13:36,754 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 13:13:37,119 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 38 [2024-11-12 13:13:37,124 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-12 13:13:37,124 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 34 [2024-11-12 13:13:37,324 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 42 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 13:13:37,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823986680] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 13:13:37,325 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 13:13:37,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 44 [2024-11-12 13:13:37,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827221396] [2024-11-12 13:13:37,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 13:13:37,325 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-11-12 13:13:37,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:13:37,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-11-12 13:13:37,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1696, Unknown=0, NotChecked=0, Total=1892 [2024-11-12 13:13:37,327 INFO L87 Difference]: Start difference. First operand 161 states and 178 transitions. Second operand has 44 states, 44 states have (on average 2.977272727272727) internal successors, (131), 44 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:38,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:13:38,655 INFO L93 Difference]: Finished difference Result 262 states and 280 transitions. [2024-11-12 13:13:38,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-11-12 13:13:38,656 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.977272727272727) internal successors, (131), 44 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2024-11-12 13:13:38,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:13:38,656 INFO L225 Difference]: With dead ends: 262 [2024-11-12 13:13:38,657 INFO L226 Difference]: Without dead ends: 178 [2024-11-12 13:13:38,658 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 88 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1115 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=412, Invalid=3620, Unknown=0, NotChecked=0, Total=4032 [2024-11-12 13:13:38,658 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 74 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-12 13:13:38,658 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 474 Invalid, 720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 715 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-12 13:13:38,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2024-11-12 13:13:38,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 169. [2024-11-12 13:13:38,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 166 states have (on average 1.1204819277108433) internal successors, (186), 168 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:38,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 186 transitions. [2024-11-12 13:13:38,661 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 186 transitions. Word has length 58 [2024-11-12 13:13:38,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:13:38,662 INFO L471 AbstractCegarLoop]: Abstraction has 169 states and 186 transitions. [2024-11-12 13:13:38,662 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.977272727272727) internal successors, (131), 44 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:38,662 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 186 transitions. [2024-11-12 13:13:38,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-11-12 13:13:38,662 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:13:38,662 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:13:38,680 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-12 13:13:38,866 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:13:38,867 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-12 13:13:38,867 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:13:38,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1443898438, now seen corresponding path program 5 times [2024-11-12 13:13:38,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:13:38,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104445911] [2024-11-12 13:13:38,868 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:13:38,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:13:38,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:13:39,172 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 1 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 13:13:39,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:13:39,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104445911] [2024-11-12 13:13:39,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104445911] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 13:13:39,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136271530] [2024-11-12 13:13:39,173 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-12 13:13:39,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:13:39,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 13:13:39,175 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 13:13:39,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-12 13:13:39,271 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-12 13:13:39,271 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 13:13:39,272 INFO L256 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-12 13:13:39,274 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 13:13:39,286 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-12 13:13:39,493 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 6 proven. 51 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 13:13:39,493 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 13:13:39,816 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 6 proven. 51 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 13:13:39,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136271530] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 13:13:39,817 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 13:13:39,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2024-11-12 13:13:39,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876554607] [2024-11-12 13:13:39,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 13:13:39,818 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-12 13:13:39,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:13:39,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-12 13:13:39,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=670, Unknown=0, NotChecked=0, Total=812 [2024-11-12 13:13:39,819 INFO L87 Difference]: Start difference. First operand 169 states and 186 transitions. Second operand has 29 states, 28 states have (on average 5.5) internal successors, (154), 29 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:40,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:13:40,072 INFO L93 Difference]: Finished difference Result 244 states and 272 transitions. [2024-11-12 13:13:40,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-12 13:13:40,073 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 5.5) internal successors, (154), 29 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2024-11-12 13:13:40,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:13:40,074 INFO L225 Difference]: With dead ends: 244 [2024-11-12 13:13:40,074 INFO L226 Difference]: Without dead ends: 238 [2024-11-12 13:13:40,074 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=158, Invalid=712, Unknown=0, NotChecked=0, Total=870 [2024-11-12 13:13:40,074 INFO L435 NwaCegarLoop]: 44 mSDtfsCounter, 30 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-12 13:13:40,075 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 472 Invalid, 466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 464 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-12 13:13:40,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2024-11-12 13:13:40,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 211. [2024-11-12 13:13:40,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 208 states have (on average 1.1153846153846154) internal successors, (232), 210 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:40,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 232 transitions. [2024-11-12 13:13:40,082 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 232 transitions. Word has length 62 [2024-11-12 13:13:40,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:13:40,082 INFO L471 AbstractCegarLoop]: Abstraction has 211 states and 232 transitions. [2024-11-12 13:13:40,082 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 5.5) internal successors, (154), 29 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:40,082 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 232 transitions. [2024-11-12 13:13:40,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-11-12 13:13:40,083 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:13:40,083 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:13:40,100 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-12 13:13:40,283 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2024-11-12 13:13:40,284 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-12 13:13:40,284 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:13:40,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1410431106, now seen corresponding path program 2 times [2024-11-12 13:13:40,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:13:40,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068063012] [2024-11-12 13:13:40,284 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:13:40,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:13:40,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:13:40,815 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 17 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:13:40,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:13:40,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068063012] [2024-11-12 13:13:40,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068063012] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 13:13:40,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881002417] [2024-11-12 13:13:40,815 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-12 13:13:40,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:13:40,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 13:13:40,817 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 13:13:40,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-12 13:13:40,920 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-12 13:13:40,920 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 13:13:40,921 INFO L256 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-12 13:13:40,924 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 13:13:41,022 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-12 13:13:41,074 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 17 proven. 22 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-12 13:13:41,074 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 13:13:41,108 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-12 13:13:41,109 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-12 13:13:41,176 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 17 proven. 22 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-12 13:13:41,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881002417] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 13:13:41,176 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 13:13:41,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 13] total 25 [2024-11-12 13:13:41,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324120623] [2024-11-12 13:13:41,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 13:13:41,177 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-12 13:13:41,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:13:41,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-12 13:13:41,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2024-11-12 13:13:41,178 INFO L87 Difference]: Start difference. First operand 211 states and 232 transitions. Second operand has 25 states, 25 states have (on average 3.88) internal successors, (97), 25 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) [2024-11-12 13:13:41,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:13:41,472 INFO L93 Difference]: Finished difference Result 341 states and 368 transitions. [2024-11-12 13:13:41,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-12 13:13:41,472 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.88) internal successors, (97), 25 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 63 [2024-11-12 13:13:41,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:13:41,473 INFO L225 Difference]: With dead ends: 341 [2024-11-12 13:13:41,473 INFO L226 Difference]: Without dead ends: 333 [2024-11-12 13:13:41,474 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=818, Unknown=0, NotChecked=0, Total=930 [2024-11-12 13:13:41,474 INFO L435 NwaCegarLoop]: 61 mSDtfsCounter, 36 mSDsluCounter, 682 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 743 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-12 13:13:41,475 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 743 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-12 13:13:41,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2024-11-12 13:13:41,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 277. [2024-11-12 13:13:41,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 274 states have (on average 1.1167883211678833) internal successors, (306), 276 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:41,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 306 transitions. [2024-11-12 13:13:41,479 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 306 transitions. Word has length 63 [2024-11-12 13:13:41,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:13:41,479 INFO L471 AbstractCegarLoop]: Abstraction has 277 states and 306 transitions. [2024-11-12 13:13:41,479 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.88) internal successors, (97), 25 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) [2024-11-12 13:13:41,479 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 306 transitions. [2024-11-12 13:13:41,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-11-12 13:13:41,480 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:13:41,480 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:13:41,494 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-12 13:13:41,683 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2024-11-12 13:13:41,684 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-12 13:13:41,684 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:13:41,684 INFO L85 PathProgramCache]: Analyzing trace with hash 939650241, now seen corresponding path program 3 times [2024-11-12 13:13:41,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:13:41,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753397073] [2024-11-12 13:13:41,684 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:13:41,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:13:41,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:13:41,966 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 1 proven. 47 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-12 13:13:41,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:13:41,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753397073] [2024-11-12 13:13:41,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753397073] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 13:13:41,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780780499] [2024-11-12 13:13:41,967 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-12 13:13:41,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:13:41,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 13:13:41,969 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 13:13:41,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-12 13:13:42,100 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-12 13:13:42,100 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 13:13:42,103 INFO L256 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-12 13:13:42,105 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 13:13:42,326 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 6 proven. 42 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-12 13:13:42,327 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 13:13:42,563 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2024-11-12 13:13:42,641 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 6 proven. 42 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-12 13:13:42,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780780499] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 13:13:42,641 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 13:13:42,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 26 [2024-11-12 13:13:42,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313037414] [2024-11-12 13:13:42,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 13:13:42,642 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-12 13:13:42,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:13:42,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-12 13:13:42,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2024-11-12 13:13:42,644 INFO L87 Difference]: Start difference. First operand 277 states and 306 transitions. Second operand has 27 states, 26 states have (on average 5.6923076923076925) internal successors, (148), 27 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:42,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:13:42,843 INFO L93 Difference]: Finished difference Result 326 states and 352 transitions. [2024-11-12 13:13:42,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-12 13:13:42,843 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 5.6923076923076925) internal successors, (148), 27 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2024-11-12 13:13:42,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:13:42,845 INFO L225 Difference]: With dead ends: 326 [2024-11-12 13:13:42,845 INFO L226 Difference]: Without dead ends: 326 [2024-11-12 13:13:42,845 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 113 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2024-11-12 13:13:42,845 INFO L435 NwaCegarLoop]: 67 mSDtfsCounter, 114 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 549 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-12 13:13:42,846 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 549 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-12 13:13:42,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2024-11-12 13:13:42,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 290. [2024-11-12 13:13:42,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 287 states have (on average 1.1184668989547037) internal successors, (321), 289 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:42,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 321 transitions. [2024-11-12 13:13:42,851 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 321 transitions. Word has length 67 [2024-11-12 13:13:42,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:13:42,851 INFO L471 AbstractCegarLoop]: Abstraction has 290 states and 321 transitions. [2024-11-12 13:13:42,851 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 5.6923076923076925) internal successors, (148), 27 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:42,851 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 321 transitions. [2024-11-12 13:13:42,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-11-12 13:13:42,852 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:13:42,852 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:13:42,866 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-12 13:13:43,056 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-11-12 13:13:43,057 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-12 13:13:43,057 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:13:43,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1016780105, now seen corresponding path program 6 times [2024-11-12 13:13:43,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:13:43,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309917129] [2024-11-12 13:13:43,057 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:13:43,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:13:43,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:13:43,451 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 28 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 13:13:43,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:13:43,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309917129] [2024-11-12 13:13:43,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309917129] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 13:13:43,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839127677] [2024-11-12 13:13:43,451 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-12 13:13:43,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:13:43,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 13:13:43,453 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 13:13:43,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-12 13:13:43,577 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-11-12 13:13:43,577 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 13:13:43,579 INFO L256 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-11-12 13:13:43,581 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 13:13:43,656 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-12 13:13:43,724 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 28 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 13:13:43,724 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 13:13:43,781 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-12 13:13:43,785 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-12 13:13:43,851 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 28 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 13:13:43,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839127677] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 13:13:43,851 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 13:13:43,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 26 [2024-11-12 13:13:43,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19689286] [2024-11-12 13:13:43,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 13:13:43,852 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-12 13:13:43,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:13:43,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-12 13:13:43,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2024-11-12 13:13:43,853 INFO L87 Difference]: Start difference. First operand 290 states and 321 transitions. Second operand has 26 states, 26 states have (on average 4.269230769230769) internal successors, (111), 26 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:44,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:13:44,110 INFO L93 Difference]: Finished difference Result 482 states and 519 transitions. [2024-11-12 13:13:44,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-12 13:13:44,110 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.269230769230769) internal successors, (111), 26 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2024-11-12 13:13:44,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:13:44,112 INFO L225 Difference]: With dead ends: 482 [2024-11-12 13:13:44,112 INFO L226 Difference]: Without dead ends: 311 [2024-11-12 13:13:44,112 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=119, Invalid=873, Unknown=0, NotChecked=0, Total=992 [2024-11-12 13:13:44,112 INFO L435 NwaCegarLoop]: 47 mSDtfsCounter, 36 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-12 13:13:44,113 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 579 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 379 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-12 13:13:44,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2024-11-12 13:13:44,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 302. [2024-11-12 13:13:44,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 299 states have (on average 1.1137123745819397) internal successors, (333), 301 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:44,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 333 transitions. [2024-11-12 13:13:44,117 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 333 transitions. Word has length 72 [2024-11-12 13:13:44,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:13:44,117 INFO L471 AbstractCegarLoop]: Abstraction has 302 states and 333 transitions. [2024-11-12 13:13:44,117 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.269230769230769) internal successors, (111), 26 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:44,117 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 333 transitions. [2024-11-12 13:13:44,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2024-11-12 13:13:44,118 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:13:44,118 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:13:44,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-12 13:13:44,318 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-11-12 13:13:44,319 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-12 13:13:44,319 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:13:44,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1510402668, now seen corresponding path program 7 times [2024-11-12 13:13:44,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:13:44,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350867221] [2024-11-12 13:13:44,319 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:13:44,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:13:44,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:13:44,756 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 6 proven. 98 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 13:13:44,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:13:44,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350867221] [2024-11-12 13:13:44,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350867221] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 13:13:44,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945854877] [2024-11-12 13:13:44,759 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-12 13:13:44,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:13:44,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 13:13:44,761 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 13:13:44,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-12 13:13:44,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:13:44,871 INFO L256 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-12 13:13:44,873 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 13:13:45,069 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 15 proven. 89 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 13:13:45,069 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 13:13:45,300 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-12 13:13:45,363 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 15 proven. 89 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 13:13:45,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945854877] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 13:13:45,364 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 13:13:45,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 28 [2024-11-12 13:13:45,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779532252] [2024-11-12 13:13:45,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 13:13:45,365 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-12 13:13:45,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:13:45,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-12 13:13:45,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2024-11-12 13:13:45,366 INFO L87 Difference]: Start difference. First operand 302 states and 333 transitions. Second operand has 29 states, 28 states have (on average 5.714285714285714) internal successors, (160), 29 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:45,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:13:45,616 INFO L93 Difference]: Finished difference Result 409 states and 457 transitions. [2024-11-12 13:13:45,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-12 13:13:45,617 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 5.714285714285714) internal successors, (160), 29 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2024-11-12 13:13:45,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:13:45,618 INFO L225 Difference]: With dead ends: 409 [2024-11-12 13:13:45,618 INFO L226 Difference]: Without dead ends: 403 [2024-11-12 13:13:45,618 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 131 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=124, Invalid=746, Unknown=0, NotChecked=0, Total=870 [2024-11-12 13:13:45,619 INFO L435 NwaCegarLoop]: 51 mSDtfsCounter, 32 mSDsluCounter, 565 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-12 13:13:45,619 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 616 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 596 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-12 13:13:45,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2024-11-12 13:13:45,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 364. [2024-11-12 13:13:45,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 361 states have (on average 1.110803324099723) internal successors, (401), 363 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:45,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 401 transitions. [2024-11-12 13:13:45,626 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 401 transitions. Word has length 76 [2024-11-12 13:13:45,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:13:45,626 INFO L471 AbstractCegarLoop]: Abstraction has 364 states and 401 transitions. [2024-11-12 13:13:45,626 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 5.714285714285714) internal successors, (160), 29 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:45,627 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 401 transitions. [2024-11-12 13:13:45,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-11-12 13:13:45,627 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:13:45,627 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:13:45,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-12 13:13:45,828 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:13:45,828 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-12 13:13:45,829 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:13:45,829 INFO L85 PathProgramCache]: Analyzing trace with hash -120638543, now seen corresponding path program 4 times [2024-11-12 13:13:45,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:13:45,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920289387] [2024-11-12 13:13:45,829 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:13:45,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:13:45,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:13:46,445 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 25 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 13:13:46,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:13:46,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920289387] [2024-11-12 13:13:46,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920289387] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 13:13:46,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11013325] [2024-11-12 13:13:46,446 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-12 13:13:46,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:13:46,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 13:13:46,448 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 13:13:46,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-12 13:13:46,561 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-12 13:13:46,561 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 13:13:46,563 INFO L256 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 79 conjuncts are in the unsatisfiable core [2024-11-12 13:13:46,565 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 13:13:46,608 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-11-12 13:13:49,984 INFO L349 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2024-11-12 13:13:49,985 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 95 treesize of output 72 [2024-11-12 13:13:50,102 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-12 13:13:50,103 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 88 [2024-11-12 13:13:50,229 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 50 proven. 13 refuted. 1 times theorem prover too weak. 43 trivial. 0 not checked. [2024-11-12 13:13:50,230 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 13:13:52,344 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-12 13:13:52,344 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 55 treesize of output 105 [2024-11-12 13:13:52,851 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2024-11-12 13:13:52,861 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 77 [2024-11-12 13:13:52,878 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-12 13:13:52,929 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2024-11-12 13:13:52,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11013325] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 13:13:52,929 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 13:13:52,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 28, 32] total 76 [2024-11-12 13:13:52,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395927396] [2024-11-12 13:13:52,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 13:13:52,930 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2024-11-12 13:13:52,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:13:52,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2024-11-12 13:13:52,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=720, Invalid=4979, Unknown=1, NotChecked=0, Total=5700 [2024-11-12 13:13:52,933 INFO L87 Difference]: Start difference. First operand 364 states and 401 transitions. Second operand has 76 states, 76 states have (on average 2.4210526315789473) internal successors, (184), 76 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:58,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:13:58,767 INFO L93 Difference]: Finished difference Result 707 states and 751 transitions. [2024-11-12 13:13:58,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2024-11-12 13:13:58,768 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.4210526315789473) internal successors, (184), 76 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2024-11-12 13:13:58,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:13:58,770 INFO L225 Difference]: With dead ends: 707 [2024-11-12 13:13:58,770 INFO L226 Difference]: Without dead ends: 699 [2024-11-12 13:13:58,774 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 102 SyntacticMatches, 5 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4743 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=2607, Invalid=15752, Unknown=1, NotChecked=0, Total=18360 [2024-11-12 13:13:58,775 INFO L435 NwaCegarLoop]: 47 mSDtfsCounter, 184 mSDsluCounter, 1409 mSDsCounter, 0 mSdLazyCounter, 4425 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 1456 SdHoareTripleChecker+Invalid, 4441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 4425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2024-11-12 13:13:58,775 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 1456 Invalid, 4441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 4425 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2024-11-12 13:13:58,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2024-11-12 13:13:58,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 346. [2024-11-12 13:13:58,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 344 states have (on average 1.0901162790697674) internal successors, (375), 345 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:58,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 375 transitions. [2024-11-12 13:13:58,782 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 375 transitions. Word has length 81 [2024-11-12 13:13:58,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:13:58,782 INFO L471 AbstractCegarLoop]: Abstraction has 346 states and 375 transitions. [2024-11-12 13:13:58,782 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.4210526315789473) internal successors, (184), 76 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:13:58,783 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 375 transitions. [2024-11-12 13:13:58,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2024-11-12 13:13:58,783 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:13:58,784 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:13:58,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-12 13:13:58,984 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-11-12 13:13:58,984 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-12 13:13:58,985 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:13:58,985 INFO L85 PathProgramCache]: Analyzing trace with hash -79474043, now seen corresponding path program 8 times [2024-11-12 13:13:58,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:13:58,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520381420] [2024-11-12 13:13:58,985 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:13:58,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:13:59,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:13:59,509 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 36 proven. 112 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 13:13:59,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:13:59,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520381420] [2024-11-12 13:13:59,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520381420] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 13:13:59,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268205021] [2024-11-12 13:13:59,509 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-12 13:13:59,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:13:59,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 13:13:59,512 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 13:13:59,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-12 13:13:59,645 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-12 13:13:59,645 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 13:13:59,647 INFO L256 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-11-12 13:13:59,650 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 13:13:59,775 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-12 13:13:59,874 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 36 proven. 112 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 13:13:59,874 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 13:13:59,942 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-12 13:13:59,945 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-12 13:14:00,018 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 36 proven. 112 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 13:14:00,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268205021] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 13:14:00,018 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 13:14:00,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 29 [2024-11-12 13:14:00,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337928757] [2024-11-12 13:14:00,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 13:14:00,019 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-12 13:14:00,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:14:00,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-12 13:14:00,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=726, Unknown=0, NotChecked=0, Total=812 [2024-11-12 13:14:00,020 INFO L87 Difference]: Start difference. First operand 346 states and 375 transitions. Second operand has 29 states, 29 states have (on average 4.448275862068965) internal successors, (129), 29 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:14:00,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:14:00,329 INFO L93 Difference]: Finished difference Result 574 states and 615 transitions. [2024-11-12 13:14:00,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-12 13:14:00,330 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.448275862068965) internal successors, (129), 29 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2024-11-12 13:14:00,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:14:00,331 INFO L225 Difference]: With dead ends: 574 [2024-11-12 13:14:00,331 INFO L226 Difference]: Without dead ends: 374 [2024-11-12 13:14:00,331 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=134, Invalid=1126, Unknown=0, NotChecked=0, Total=1260 [2024-11-12 13:14:00,332 INFO L435 NwaCegarLoop]: 55 mSDtfsCounter, 35 mSDsluCounter, 919 mSDsCounter, 0 mSdLazyCounter, 640 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 974 SdHoareTripleChecker+Invalid, 645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-12 13:14:00,332 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 974 Invalid, 645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 640 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-12 13:14:00,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2024-11-12 13:14:00,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 362. [2024-11-12 13:14:00,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 360 states have (on average 1.086111111111111) internal successors, (391), 361 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:14:00,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 391 transitions. [2024-11-12 13:14:00,337 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 391 transitions. Word has length 86 [2024-11-12 13:14:00,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:14:00,337 INFO L471 AbstractCegarLoop]: Abstraction has 362 states and 391 transitions. [2024-11-12 13:14:00,338 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.448275862068965) internal successors, (129), 29 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:14:00,338 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 391 transitions. [2024-11-12 13:14:00,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2024-11-12 13:14:00,338 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:14:00,339 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:14:00,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-12 13:14:00,542 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-11-12 13:14:00,543 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-12 13:14:00,543 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:14:00,543 INFO L85 PathProgramCache]: Analyzing trace with hash -2111801694, now seen corresponding path program 9 times [2024-11-12 13:14:00,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:14:00,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018367558] [2024-11-12 13:14:00,543 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:14:00,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:14:00,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:14:01,004 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 15 proven. 150 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 13:14:01,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:14:01,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018367558] [2024-11-12 13:14:01,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018367558] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 13:14:01,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038810756] [2024-11-12 13:14:01,004 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-12 13:14:01,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:14:01,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 13:14:01,006 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 13:14:01,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-12 13:14:01,213 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-12 13:14:01,213 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 13:14:01,215 INFO L256 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-12 13:14:01,217 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 13:14:01,494 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 28 proven. 137 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 13:14:01,494 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 13:14:01,759 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2024-11-12 13:14:01,843 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 28 proven. 137 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 13:14:01,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038810756] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 13:14:01,843 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 13:14:01,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 37 [2024-11-12 13:14:01,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855728265] [2024-11-12 13:14:01,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 13:14:01,844 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-12 13:14:01,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:14:01,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-12 13:14:01,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1198, Unknown=0, NotChecked=0, Total=1406 [2024-11-12 13:14:01,845 INFO L87 Difference]: Start difference. First operand 362 states and 391 transitions. Second operand has 38 states, 37 states have (on average 6.27027027027027) internal successors, (232), 38 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:14:02,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:14:02,106 INFO L93 Difference]: Finished difference Result 448 states and 487 transitions. [2024-11-12 13:14:02,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-12 13:14:02,106 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 6.27027027027027) internal successors, (232), 38 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2024-11-12 13:14:02,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:14:02,107 INFO L225 Difference]: With dead ends: 448 [2024-11-12 13:14:02,107 INFO L226 Difference]: Without dead ends: 442 [2024-11-12 13:14:02,108 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 151 SyntacticMatches, 6 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 683 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=222, Invalid=1260, Unknown=0, NotChecked=0, Total=1482 [2024-11-12 13:14:02,108 INFO L435 NwaCegarLoop]: 58 mSDtfsCounter, 45 mSDsluCounter, 632 mSDsCounter, 0 mSdLazyCounter, 677 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 690 SdHoareTripleChecker+Invalid, 679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-12 13:14:02,108 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 690 Invalid, 679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 677 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-12 13:14:02,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2024-11-12 13:14:02,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 402. [2024-11-12 13:14:02,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 400 states have (on average 1.085) internal successors, (434), 401 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:14:02,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 434 transitions. [2024-11-12 13:14:02,114 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 434 transitions. Word has length 90 [2024-11-12 13:14:02,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:14:02,114 INFO L471 AbstractCegarLoop]: Abstraction has 402 states and 434 transitions. [2024-11-12 13:14:02,115 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 6.27027027027027) internal successors, (232), 38 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:14:02,115 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 434 transitions. [2024-11-12 13:14:02,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2024-11-12 13:14:02,116 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:14:02,116 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:14:02,134 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-12 13:14:02,320 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-11-12 13:14:02,321 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-12 13:14:02,321 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:14:02,321 INFO L85 PathProgramCache]: Analyzing trace with hash -555271661, now seen corresponding path program 10 times [2024-11-12 13:14:02,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:14:02,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806369082] [2024-11-12 13:14:02,321 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:14:02,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:14:02,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:14:02,894 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 44 proven. 175 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 13:14:02,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:14:02,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806369082] [2024-11-12 13:14:02,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806369082] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 13:14:02,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815831684] [2024-11-12 13:14:02,894 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-12 13:14:02,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:14:02,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 13:14:02,896 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 13:14:02,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-12 13:14:03,024 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-12 13:14:03,024 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 13:14:03,026 INFO L256 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 68 conjuncts are in the unsatisfiable core [2024-11-12 13:14:03,028 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 13:14:03,200 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-11-12 13:14:17,291 INFO L349 Elim1Store]: treesize reduction 25, result has 49.0 percent of original size [2024-11-12 13:14:17,292 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 68 treesize of output 50 [2024-11-12 13:14:17,296 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 108 proven. 55 refuted. 56 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 13:14:17,297 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 13:14:18,740 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 77 [2024-11-12 13:14:18,745 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-12 13:14:18,745 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 89 treesize of output 67 [2024-11-12 13:14:19,108 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 174 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 13:14:19,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815831684] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 13:14:19,109 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 13:14:19,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 34, 34] total 76 [2024-11-12 13:14:19,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462601248] [2024-11-12 13:14:19,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 13:14:19,109 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2024-11-12 13:14:19,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:14:19,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2024-11-12 13:14:19,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=5071, Unknown=34, NotChecked=0, Total=5700 [2024-11-12 13:14:19,111 INFO L87 Difference]: Start difference. First operand 402 states and 434 transitions. Second operand has 76 states, 76 states have (on average 3.3815789473684212) internal successors, (257), 76 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:14:21,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:14:21,627 INFO L93 Difference]: Finished difference Result 670 states and 717 transitions. [2024-11-12 13:14:21,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-11-12 13:14:21,628 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 3.3815789473684212) internal successors, (257), 76 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2024-11-12 13:14:21,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:14:21,629 INFO L225 Difference]: With dead ends: 670 [2024-11-12 13:14:21,629 INFO L226 Difference]: Without dead ends: 430 [2024-11-12 13:14:21,631 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 142 SyntacticMatches, 2 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 3577 ImplicationChecksByTransitivity, 16.8s TimeCoverageRelationStatistics Valid=1122, Invalid=9555, Unknown=35, NotChecked=0, Total=10712 [2024-11-12 13:14:21,631 INFO L435 NwaCegarLoop]: 53 mSDtfsCounter, 67 mSDsluCounter, 1147 mSDsCounter, 0 mSdLazyCounter, 1246 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 1200 SdHoareTripleChecker+Invalid, 1251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-12 13:14:21,631 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 1200 Invalid, 1251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1246 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-12 13:14:21,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2024-11-12 13:14:21,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 418. [2024-11-12 13:14:21,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 416 states have (on average 1.0817307692307692) internal successors, (450), 417 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:14:21,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 450 transitions. [2024-11-12 13:14:21,637 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 450 transitions. Word has length 100 [2024-11-12 13:14:21,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:14:21,638 INFO L471 AbstractCegarLoop]: Abstraction has 418 states and 450 transitions. [2024-11-12 13:14:21,638 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 3.3815789473684212) internal successors, (257), 76 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:14:21,638 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 450 transitions. [2024-11-12 13:14:21,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-11-12 13:14:21,640 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:14:21,640 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:14:21,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-12 13:14:21,840 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-11-12 13:14:21,841 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-12 13:14:21,841 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:14:21,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1479514256, now seen corresponding path program 11 times [2024-11-12 13:14:21,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:14:21,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454007202] [2024-11-12 13:14:21,841 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:14:21,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:14:21,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:14:22,514 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 28 proven. 212 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 13:14:22,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:14:22,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454007202] [2024-11-12 13:14:22,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454007202] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 13:14:22,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436979729] [2024-11-12 13:14:22,514 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-12 13:14:22,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:14:22,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 13:14:22,516 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 13:14:22,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-12 13:14:22,687 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-11-12 13:14:22,688 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 13:14:22,690 INFO L256 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-11-12 13:14:22,693 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 13:14:22,698 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-12 13:14:23,082 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 45 proven. 195 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 13:14:23,083 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 13:14:23,702 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 45 proven. 195 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 13:14:23,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436979729] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 13:14:23,703 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 13:14:23,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 43 [2024-11-12 13:14:23,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678225846] [2024-11-12 13:14:23,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 13:14:23,703 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-11-12 13:14:23,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:14:23,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-11-12 13:14:23,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=1598, Unknown=0, NotChecked=0, Total=1892 [2024-11-12 13:14:23,704 INFO L87 Difference]: Start difference. First operand 418 states and 450 transitions. Second operand has 44 states, 43 states have (on average 5.813953488372093) internal successors, (250), 44 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:14:24,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-12 13:14:24,063 INFO L93 Difference]: Finished difference Result 504 states and 546 transitions. [2024-11-12 13:14:24,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-12 13:14:24,063 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 5.813953488372093) internal successors, (250), 44 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2024-11-12 13:14:24,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-12 13:14:24,065 INFO L225 Difference]: With dead ends: 504 [2024-11-12 13:14:24,065 INFO L226 Difference]: Without dead ends: 498 [2024-11-12 13:14:24,065 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 707 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=319, Invalid=1661, Unknown=0, NotChecked=0, Total=1980 [2024-11-12 13:14:24,065 INFO L435 NwaCegarLoop]: 63 mSDtfsCounter, 42 mSDsluCounter, 724 mSDsCounter, 0 mSdLazyCounter, 865 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 787 SdHoareTripleChecker+Invalid, 867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 865 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-12 13:14:24,066 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 787 Invalid, 867 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 865 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-12 13:14:24,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2024-11-12 13:14:24,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 458. [2024-11-12 13:14:24,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 456 states have (on average 1.081140350877193) internal successors, (493), 457 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:14:24,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 493 transitions. [2024-11-12 13:14:24,072 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 493 transitions. Word has length 104 [2024-11-12 13:14:24,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-12 13:14:24,072 INFO L471 AbstractCegarLoop]: Abstraction has 458 states and 493 transitions. [2024-11-12 13:14:24,072 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 5.813953488372093) internal successors, (250), 44 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 13:14:24,072 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 493 transitions. [2024-11-12 13:14:24,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2024-11-12 13:14:24,073 INFO L210 NwaCegarLoop]: Found error trace [2024-11-12 13:14:24,073 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 13:14:24,092 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-12 13:14:24,274 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:14:24,274 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-12 13:14:24,274 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 13:14:24,275 INFO L85 PathProgramCache]: Analyzing trace with hash 762511713, now seen corresponding path program 12 times [2024-11-12 13:14:24,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 13:14:24,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101174343] [2024-11-12 13:14:24,275 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 13:14:24,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 13:14:24,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 13:14:24,970 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 52 proven. 252 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 13:14:24,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 13:14:24,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101174343] [2024-11-12 13:14:24,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101174343] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 13:14:24,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940845483] [2024-11-12 13:14:24,971 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-12 13:14:24,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 13:14:24,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 13:14:24,973 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 13:14:24,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-12 13:14:25,193 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2024-11-12 13:14:25,193 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 13:14:25,196 INFO L256 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-11-12 13:14:25,199 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 13:14:25,332 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-11-12 13:14:27,925 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-12 13:14:27,925 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2024-11-12 13:14:28,085 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 45 proven. 259 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 13:14:28,085 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 13:14:29,138 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2024-11-12 13:14:29,143 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-12 13:14:29,148 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2024-11-12 13:14:29,283 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 45 proven. 259 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 13:14:29,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940845483] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 13:14:29,283 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 13:14:29,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 20] total 53 [2024-11-12 13:14:29,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243126971] [2024-11-12 13:14:29,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 13:14:29,284 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2024-11-12 13:14:29,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 13:14:29,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2024-11-12 13:14:29,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=2514, Unknown=1, NotChecked=0, Total=2756 [2024-11-12 13:14:29,285 INFO L87 Difference]: Start difference. First operand 458 states and 493 transitions. Second operand has 53 states, 53 states have (on average 5.660377358490566) internal successors, (300), 53 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)