./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/openbsd_cstpcpy-alloca-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 023d838f 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/openbsd_cstpcpy-alloca-1.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 f22afdea3888c472e42c0b4bee511704d4ceb9c1e2d9f4db0ce5ffbd6de758f0 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-023d838-m [2024-11-10 15:00:19,530 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-10 15:00:19,617 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-10 15:00:19,623 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-10 15:00:19,626 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-10 15:00:19,653 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-10 15:00:19,653 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-10 15:00:19,654 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-10 15:00:19,654 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-10 15:00:19,654 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-10 15:00:19,655 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-10 15:00:19,655 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-10 15:00:19,655 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-10 15:00:19,656 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-10 15:00:19,657 INFO L153 SettingsManager]: * Use SBE=true [2024-11-10 15:00:19,657 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-10 15:00:19,658 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-10 15:00:19,660 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-10 15:00:19,661 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-10 15:00:19,661 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-10 15:00:19,661 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-10 15:00:19,664 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-10 15:00:19,664 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-10 15:00:19,664 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-10 15:00:19,665 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-10 15:00:19,665 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-10 15:00:19,665 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-10 15:00:19,665 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-10 15:00:19,666 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-10 15:00:19,666 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-10 15:00:19,666 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-10 15:00:19,666 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-10 15:00:19,667 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-10 15:00:19,667 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 15:00:19,668 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-10 15:00:19,668 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-10 15:00:19,668 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-10 15:00:19,669 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-10 15:00:19,669 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-10 15:00:19,669 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-10 15:00:19,669 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-10 15:00:19,670 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-10 15:00:19,670 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f22afdea3888c472e42c0b4bee511704d4ceb9c1e2d9f4db0ce5ffbd6de758f0 [2024-11-10 15:00:19,919 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-10 15:00:19,945 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-10 15:00:19,948 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-10 15:00:19,949 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-10 15:00:19,950 INFO L274 PluginConnector]: CDTParser initialized [2024-11-10 15:00:19,951 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/openbsd_cstpcpy-alloca-1.i [2024-11-10 15:00:21,356 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-10 15:00:21,590 INFO L384 CDTParser]: Found 1 translation units. [2024-11-10 15:00:21,591 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/openbsd_cstpcpy-alloca-1.i [2024-11-10 15:00:21,606 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aeb8f8e40/3503677dd37344da85dca9a5583d4467/FLAG1b19c5afe [2024-11-10 15:00:21,617 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aeb8f8e40/3503677dd37344da85dca9a5583d4467 [2024-11-10 15:00:21,620 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-10 15:00:21,621 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-10 15:00:21,622 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-10 15:00:21,622 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-10 15:00:21,627 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-10 15:00:21,628 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 03:00:21" (1/1) ... [2024-11-10 15:00:21,629 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58fbaaad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 03:00:21, skipping insertion in model container [2024-11-10 15:00:21,629 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 03:00:21" (1/1) ... [2024-11-10 15:00:21,667 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-10 15:00:21,992 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-10 15:00:21,992 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-10 15:00:21,997 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 15:00:22,009 INFO L200 MainTranslator]: Completed pre-run [2024-11-10 15:00:22,056 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 15:00:22,090 INFO L204 MainTranslator]: Completed translation [2024-11-10 15:00:22,091 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 03:00:22 WrapperNode [2024-11-10 15:00:22,091 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-10 15:00:22,093 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-10 15:00:22,093 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-10 15:00:22,093 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-10 15:00:22,100 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 03:00:22" (1/1) ... [2024-11-10 15:00:22,118 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 03:00:22" (1/1) ... [2024-11-10 15:00:22,139 INFO L138 Inliner]: procedures = 117, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 65 [2024-11-10 15:00:22,139 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-10 15:00:22,140 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-10 15:00:22,140 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-10 15:00:22,140 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-10 15:00:22,150 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 03:00:22" (1/1) ... [2024-11-10 15:00:22,151 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 03:00:22" (1/1) ... [2024-11-10 15:00:22,155 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 03:00:22" (1/1) ... [2024-11-10 15:00:22,178 INFO L175 MemorySlicer]: Split 4 memory accesses to 2 slices as follows [3, 1]. 75 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0, 0]. The 3 writes are split as follows [2, 1]. [2024-11-10 15:00:22,179 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 03:00:22" (1/1) ... [2024-11-10 15:00:22,182 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 03:00:22" (1/1) ... [2024-11-10 15:00:22,187 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 03:00:22" (1/1) ... [2024-11-10 15:00:22,191 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 03:00:22" (1/1) ... [2024-11-10 15:00:22,193 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 03:00:22" (1/1) ... [2024-11-10 15:00:22,194 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 03:00:22" (1/1) ... [2024-11-10 15:00:22,196 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-10 15:00:22,199 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-10 15:00:22,199 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-10 15:00:22,199 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-10 15:00:22,201 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 03:00:22" (1/1) ... [2024-11-10 15:00:22,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 15:00:22,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 15:00:22,229 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) [2024-11-10 15:00:22,232 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 [2024-11-10 15:00:22,275 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-10 15:00:22,275 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-10 15:00:22,275 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-10 15:00:22,275 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-10 15:00:22,275 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-10 15:00:22,275 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-10 15:00:22,276 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-10 15:00:22,276 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-10 15:00:22,374 INFO L256 CfgBuilder]: Building ICFG [2024-11-10 15:00:22,376 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-10 15:00:22,528 INFO L1247 $ProcedureCfgBuilder]: dead code at ProgramPoint L528: call ULTIMATE.dealloc(main_#t~malloc7#1.base, main_#t~malloc7#1.offset);havoc main_#t~malloc7#1.base, main_#t~malloc7#1.offset;call ULTIMATE.dealloc(main_#t~malloc8#1.base, main_#t~malloc8#1.offset);havoc main_#t~malloc8#1.base, main_#t~malloc8#1.offset; [2024-11-10 15:00:22,540 INFO L? ?]: Removed 38 outVars from TransFormulas that were not future-live. [2024-11-10 15:00:22,540 INFO L307 CfgBuilder]: Performing block encoding [2024-11-10 15:00:22,552 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-10 15:00:22,552 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-10 15:00:22,552 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 03:00:22 BoogieIcfgContainer [2024-11-10 15:00:22,553 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-10 15:00:22,555 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-10 15:00:22,556 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-10 15:00:22,559 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-10 15:00:22,560 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 03:00:21" (1/3) ... [2024-11-10 15:00:22,560 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1370f752 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 03:00:22, skipping insertion in model container [2024-11-10 15:00:22,560 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 03:00:22" (2/3) ... [2024-11-10 15:00:22,561 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1370f752 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 03:00:22, skipping insertion in model container [2024-11-10 15:00:22,561 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 03:00:22" (3/3) ... [2024-11-10 15:00:22,562 INFO L112 eAbstractionObserver]: Analyzing ICFG openbsd_cstpcpy-alloca-1.i [2024-11-10 15:00:22,577 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-10 15:00:22,577 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2024-11-10 15:00:22,613 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-10 15:00:22,621 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;@c0a006e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-10 15:00:22,621 INFO L334 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2024-11-10 15:00:22,626 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 31 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:00:22,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-10 15:00:22,633 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 15:00:22,634 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-10 15:00:22,635 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-10 15:00:22,641 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 15:00:22,642 INFO L85 PathProgramCache]: Analyzing trace with hash 947587943, now seen corresponding path program 1 times [2024-11-10 15:00:22,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 15:00:22,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039408134] [2024-11-10 15:00:22,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:00:22,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 15:00:22,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:00:22,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:00:22,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 15:00:22,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039408134] [2024-11-10 15:00:22,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039408134] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 15:00:22,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 15:00:22,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-10 15:00:22,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927216304] [2024-11-10 15:00:22,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 15:00:22,900 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 15:00:22,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 15:00:22,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 15:00:22,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 15:00:22,931 INFO L87 Difference]: Start difference. First operand has 32 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 31 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) 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) [2024-11-10 15:00:23,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 15:00:23,055 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2024-11-10 15:00:23,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 15:00:23,059 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 [2024-11-10 15:00:23,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 15:00:23,073 INFO L225 Difference]: With dead ends: 33 [2024-11-10 15:00:23,073 INFO L226 Difference]: Without dead ends: 30 [2024-11-10 15:00:23,075 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-10 15:00:23,081 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 2 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-10 15:00:23,082 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 86 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-10 15:00:23,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-11-10 15:00:23,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2024-11-10 15:00:23,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 21 states have (on average 1.619047619047619) internal successors, (34), 29 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) [2024-11-10 15:00:23,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2024-11-10 15:00:23,118 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 7 [2024-11-10 15:00:23,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 15:00:23,119 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2024-11-10 15:00:23,119 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) [2024-11-10 15:00:23,120 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2024-11-10 15:00:23,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-10 15:00:23,121 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 15:00:23,121 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-10 15:00:23,121 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-10 15:00:23,122 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-10 15:00:23,122 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 15:00:23,122 INFO L85 PathProgramCache]: Analyzing trace with hash 947617734, now seen corresponding path program 1 times [2024-11-10 15:00:23,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 15:00:23,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401337298] [2024-11-10 15:00:23,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:00:23,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 15:00:23,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:00:23,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:00:23,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 15:00:23,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401337298] [2024-11-10 15:00:23,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401337298] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 15:00:23,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 15:00:23,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 15:00:23,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419805805] [2024-11-10 15:00:23,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 15:00:23,172 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 15:00:23,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 15:00:23,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 15:00:23,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 15:00:23,173 INFO L87 Difference]: Start difference. First operand 30 states and 34 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) [2024-11-10 15:00:23,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 15:00:23,202 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2024-11-10 15:00:23,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 15:00:23,202 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 [2024-11-10 15:00:23,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 15:00:23,203 INFO L225 Difference]: With dead ends: 32 [2024-11-10 15:00:23,204 INFO L226 Difference]: Without dead ends: 30 [2024-11-10 15:00:23,205 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 15:00:23,206 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 2 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 47 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 [2024-11-10 15:00:23,208 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 47 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-10 15:00:23,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-11-10 15:00:23,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2024-11-10 15:00:23,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 20 states have (on average 1.6) internal successors, (32), 28 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:00:23,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2024-11-10 15:00:23,213 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 7 [2024-11-10 15:00:23,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 15:00:23,213 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2024-11-10 15:00:23,213 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) [2024-11-10 15:00:23,214 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2024-11-10 15:00:23,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-10 15:00:23,214 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 15:00:23,214 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 15:00:23,214 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-10 15:00:23,214 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-10 15:00:23,215 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 15:00:23,217 INFO L85 PathProgramCache]: Analyzing trace with hash -689454477, now seen corresponding path program 1 times [2024-11-10 15:00:23,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 15:00:23,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116815378] [2024-11-10 15:00:23,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:00:23,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 15:00:23,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:00:23,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:00:23,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 15:00:23,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116815378] [2024-11-10 15:00:23,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116815378] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 15:00:23,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 15:00:23,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 15:00:23,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918025084] [2024-11-10 15:00:23,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 15:00:23,513 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 15:00:23,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 15:00:23,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 15:00:23,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 15:00:23,514 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:00:23,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 15:00:23,552 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2024-11-10 15:00:23,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 15:00:23,552 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-11-10 15:00:23,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 15:00:23,553 INFO L225 Difference]: With dead ends: 29 [2024-11-10 15:00:23,553 INFO L226 Difference]: Without dead ends: 29 [2024-11-10 15:00:23,554 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 15:00:23,555 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 6 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-10 15:00:23,555 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 56 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-10 15:00:23,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-11-10 15:00:23,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2024-11-10 15:00:23,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 20 states have (on average 1.5) internal successors, (30), 26 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) [2024-11-10 15:00:23,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2024-11-10 15:00:23,559 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 8 [2024-11-10 15:00:23,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 15:00:23,559 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2024-11-10 15:00:23,559 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:00:23,560 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2024-11-10 15:00:23,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-10 15:00:23,560 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 15:00:23,560 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 15:00:23,560 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-10 15:00:23,561 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-10 15:00:23,561 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 15:00:23,561 INFO L85 PathProgramCache]: Analyzing trace with hash -689454476, now seen corresponding path program 1 times [2024-11-10 15:00:23,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 15:00:23,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203029603] [2024-11-10 15:00:23,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:00:23,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 15:00:23,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:00:23,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:00:23,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 15:00:23,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203029603] [2024-11-10 15:00:23,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203029603] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 15:00:23,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 15:00:23,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-10 15:00:23,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915662244] [2024-11-10 15:00:23,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 15:00:23,744 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 15:00:23,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 15:00:23,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 15:00:23,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-10 15:00:23,745 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:00:23,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 15:00:23,859 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2024-11-10 15:00:23,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 15:00:23,860 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-11-10 15:00:23,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 15:00:23,861 INFO L225 Difference]: With dead ends: 39 [2024-11-10 15:00:23,861 INFO L226 Difference]: Without dead ends: 39 [2024-11-10 15:00:23,861 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-10 15:00:23,862 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 14 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-10 15:00:23,863 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 80 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-10 15:00:23,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-11-10 15:00:23,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 31. [2024-11-10 15:00:23,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 30 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) [2024-11-10 15:00:23,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2024-11-10 15:00:23,870 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 8 [2024-11-10 15:00:23,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 15:00:23,870 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2024-11-10 15:00:23,870 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:00:23,871 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2024-11-10 15:00:23,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-10 15:00:23,871 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 15:00:23,871 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 15:00:23,875 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-10 15:00:23,875 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-10 15:00:23,875 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 15:00:23,876 INFO L85 PathProgramCache]: Analyzing trace with hash -688530955, now seen corresponding path program 1 times [2024-11-10 15:00:23,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 15:00:23,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570028693] [2024-11-10 15:00:23,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:00:23,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 15:00:23,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:00:24,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:00:24,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 15:00:24,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570028693] [2024-11-10 15:00:24,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570028693] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 15:00:24,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 15:00:24,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-10 15:00:24,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955530859] [2024-11-10 15:00:24,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 15:00:24,115 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-10 15:00:24,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 15:00:24,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-10 15:00:24,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-10 15:00:24,118 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:00:24,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 15:00:24,164 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2024-11-10 15:00:24,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 15:00:24,165 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-11-10 15:00:24,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 15:00:24,166 INFO L225 Difference]: With dead ends: 35 [2024-11-10 15:00:24,166 INFO L226 Difference]: Without dead ends: 35 [2024-11-10 15:00:24,166 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-10 15:00:24,170 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 14 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-10 15:00:24,170 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 66 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-10 15:00:24,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-11-10 15:00:24,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2024-11-10 15:00:24,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 23 states have (on average 1.434782608695652) internal successors, (33), 29 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:00:24,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2024-11-10 15:00:24,175 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 8 [2024-11-10 15:00:24,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 15:00:24,175 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2024-11-10 15:00:24,175 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:00:24,176 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2024-11-10 15:00:24,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-10 15:00:24,176 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 15:00:24,176 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 15:00:24,176 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-10 15:00:24,176 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-10 15:00:24,177 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 15:00:24,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1081504042, now seen corresponding path program 1 times [2024-11-10 15:00:24,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 15:00:24,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370561223] [2024-11-10 15:00:24,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:00:24,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 15:00:24,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:00:24,240 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:00:24,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 15:00:24,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370561223] [2024-11-10 15:00:24,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370561223] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 15:00:24,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919856513] [2024-11-10 15:00:24,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:00:24,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 15:00:24,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 15:00:24,245 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) [2024-11-10 15:00:24,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-10 15:00:24,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:00:24,312 INFO L255 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-10 15:00:24,317 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 15:00:24,424 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:00:24,425 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-10 15:00:24,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919856513] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 15:00:24,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-10 15:00:24,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2024-11-10 15:00:24,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073233933] [2024-11-10 15:00:24,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 15:00:24,427 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 15:00:24,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 15:00:24,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 15:00:24,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-11-10 15:00:24,428 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:00:24,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 15:00:24,453 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2024-11-10 15:00:24,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 15:00:24,455 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-11-10 15:00:24,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 15:00:24,457 INFO L225 Difference]: With dead ends: 39 [2024-11-10 15:00:24,457 INFO L226 Difference]: Without dead ends: 39 [2024-11-10 15:00:24,458 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-11-10 15:00:24,458 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 2 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-10 15:00:24,459 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 47 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-10 15:00:24,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-11-10 15:00:24,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2024-11-10 15:00:24,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 36 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:00:24,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2024-11-10 15:00:24,465 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 12 [2024-11-10 15:00:24,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 15:00:24,466 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2024-11-10 15:00:24,466 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:00:24,466 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2024-11-10 15:00:24,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-10 15:00:24,467 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 15:00:24,467 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 15:00:24,479 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-10 15:00:24,667 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,SelfDestructingSolverStorable5 [2024-11-10 15:00:24,668 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-10 15:00:24,668 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 15:00:24,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1406008791, now seen corresponding path program 1 times [2024-11-10 15:00:24,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 15:00:24,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117729814] [2024-11-10 15:00:24,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:00:24,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 15:00:24,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:00:24,728 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:00:24,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 15:00:24,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117729814] [2024-11-10 15:00:24,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117729814] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 15:00:24,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384687039] [2024-11-10 15:00:24,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:00:24,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 15:00:24,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 15:00:24,733 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) [2024-11-10 15:00:24,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-10 15:00:24,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:00:24,793 INFO L255 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-10 15:00:24,794 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 15:00:24,851 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:00:24,851 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-10 15:00:24,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384687039] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 15:00:24,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-10 15:00:24,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2024-11-10 15:00:24,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991218164] [2024-11-10 15:00:24,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 15:00:24,852 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 15:00:24,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 15:00:24,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 15:00:24,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-11-10 15:00:24,853 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:00:24,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 15:00:24,889 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2024-11-10 15:00:24,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 15:00:24,890 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-11-10 15:00:24,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 15:00:24,892 INFO L225 Difference]: With dead ends: 52 [2024-11-10 15:00:24,893 INFO L226 Difference]: Without dead ends: 52 [2024-11-10 15:00:24,893 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-11-10 15:00:24,894 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 1 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-10 15:00:24,894 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 85 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-10 15:00:24,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-11-10 15:00:24,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 38. [2024-11-10 15:00:24,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 37 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:00:24,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2024-11-10 15:00:24,902 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 12 [2024-11-10 15:00:24,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 15:00:24,902 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2024-11-10 15:00:24,902 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:00:24,902 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2024-11-10 15:00:24,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-10 15:00:24,903 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 15:00:24,903 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 15:00:24,920 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-10 15:00:25,107 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,SelfDestructingSolverStorable6 [2024-11-10 15:00:25,108 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-10 15:00:25,109 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 15:00:25,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1209495286, now seen corresponding path program 1 times [2024-11-10 15:00:25,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 15:00:25,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411460181] [2024-11-10 15:00:25,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:00:25,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 15:00:25,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:00:25,363 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:00:25,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 15:00:25,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411460181] [2024-11-10 15:00:25,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411460181] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 15:00:25,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876802962] [2024-11-10 15:00:25,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:00:25,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 15:00:25,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 15:00:25,366 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) [2024-11-10 15:00:25,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-10 15:00:25,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:00:25,432 INFO L255 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-10 15:00:25,435 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 15:00:25,497 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 [2024-11-10 15:00:25,507 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 [2024-11-10 15:00:25,661 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:00:25,661 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 15:00:25,837 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:00:25,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876802962] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 15:00:25,837 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 15:00:25,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 14 [2024-11-10 15:00:25,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280022396] [2024-11-10 15:00:25,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 15:00:25,838 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-10 15:00:25,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 15:00:25,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-10 15:00:25,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2024-11-10 15:00:25,839 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 15 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 15 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) [2024-11-10 15:00:25,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 15:00:25,983 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2024-11-10 15:00:25,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-10 15:00:25,983 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 15 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 12 [2024-11-10 15:00:25,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 15:00:25,984 INFO L225 Difference]: With dead ends: 38 [2024-11-10 15:00:25,984 INFO L226 Difference]: Without dead ends: 38 [2024-11-10 15:00:25,985 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2024-11-10 15:00:25,985 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 12 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-10 15:00:25,986 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 90 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-10 15:00:25,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-11-10 15:00:25,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2024-11-10 15:00:25,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 35 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:00:25,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2024-11-10 15:00:25,989 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 12 [2024-11-10 15:00:25,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 15:00:25,989 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2024-11-10 15:00:25,989 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 15 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) [2024-11-10 15:00:25,990 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2024-11-10 15:00:25,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-10 15:00:25,990 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 15:00:25,990 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 15:00:26,007 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-10 15:00:26,191 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 15:00:26,191 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-10 15:00:26,192 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 15:00:26,192 INFO L85 PathProgramCache]: Analyzing trace with hash 833111044, now seen corresponding path program 1 times [2024-11-10 15:00:26,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 15:00:26,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330997473] [2024-11-10 15:00:26,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:00:26,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 15:00:26,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:00:26,274 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:00:26,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 15:00:26,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330997473] [2024-11-10 15:00:26,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330997473] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 15:00:26,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378202429] [2024-11-10 15:00:26,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:00:26,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 15:00:26,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 15:00:26,277 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) [2024-11-10 15:00:26,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-10 15:00:26,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:00:26,335 INFO L255 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-10 15:00:26,336 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 15:00:26,411 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:00:26,412 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 15:00:26,456 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-11-10 15:00:26,513 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:00:26,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378202429] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 15:00:26,514 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 15:00:26,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2024-11-10 15:00:26,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42432883] [2024-11-10 15:00:26,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 15:00:26,515 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-10 15:00:26,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 15:00:26,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-10 15:00:26,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-11-10 15:00:26,516 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 10 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:00:26,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 15:00:26,604 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2024-11-10 15:00:26,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-10 15:00:26,604 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-11-10 15:00:26,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 15:00:26,605 INFO L225 Difference]: With dead ends: 45 [2024-11-10 15:00:26,605 INFO L226 Difference]: Without dead ends: 45 [2024-11-10 15:00:26,605 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2024-11-10 15:00:26,606 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 5 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-10 15:00:26,606 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 110 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-10 15:00:26,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-11-10 15:00:26,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2024-11-10 15:00:26,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 39 states have (on average 1.2564102564102564) internal successors, (49), 44 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:00:26,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2024-11-10 15:00:26,610 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 13 [2024-11-10 15:00:26,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 15:00:26,610 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2024-11-10 15:00:26,610 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:00:26,610 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2024-11-10 15:00:26,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-10 15:00:26,611 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 15:00:26,611 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 15:00:26,628 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-10 15:00:26,811 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 15:00:26,812 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-10 15:00:26,812 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 15:00:26,812 INFO L85 PathProgramCache]: Analyzing trace with hash 636597539, now seen corresponding path program 1 times [2024-11-10 15:00:26,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 15:00:26,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341773158] [2024-11-10 15:00:26,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:00:26,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 15:00:26,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:00:26,917 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:00:26,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 15:00:26,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341773158] [2024-11-10 15:00:26,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341773158] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 15:00:26,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988722995] [2024-11-10 15:00:26,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:00:26,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 15:00:26,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 15:00:26,920 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) [2024-11-10 15:00:26,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-10 15:00:26,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:00:26,975 INFO L255 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-10 15:00:26,977 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 15:00:27,070 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:00:27,071 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 15:00:27,108 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-11-10 15:00:27,190 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:00:27,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988722995] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 15:00:27,190 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 15:00:27,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2024-11-10 15:00:27,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227911673] [2024-11-10 15:00:27,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 15:00:27,191 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-10 15:00:27,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 15:00:27,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-10 15:00:27,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2024-11-10 15:00:27,191 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand has 12 states, 11 states have (on average 2.909090909090909) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:00:27,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 15:00:27,292 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2024-11-10 15:00:27,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-10 15:00:27,293 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.909090909090909) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-11-10 15:00:27,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 15:00:27,293 INFO L225 Difference]: With dead ends: 48 [2024-11-10 15:00:27,293 INFO L226 Difference]: Without dead ends: 48 [2024-11-10 15:00:27,294 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2024-11-10 15:00:27,294 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 5 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-10 15:00:27,294 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 111 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-10 15:00:27,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-11-10 15:00:27,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 38. [2024-11-10 15:00:27,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 32 states have (on average 1.3125) internal successors, (42), 37 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:00:27,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2024-11-10 15:00:27,301 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 13 [2024-11-10 15:00:27,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 15:00:27,301 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2024-11-10 15:00:27,304 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.909090909090909) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:00:27,304 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2024-11-10 15:00:27,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-10 15:00:27,304 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 15:00:27,304 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 15:00:27,323 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-10 15:00:27,505 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,SelfDestructingSolverStorable9 [2024-11-10 15:00:27,505 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-10 15:00:27,505 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 15:00:27,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1160353820, now seen corresponding path program 1 times [2024-11-10 15:00:27,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 15:00:27,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642614816] [2024-11-10 15:00:27,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:00:27,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 15:00:27,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:00:27,608 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:00:27,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 15:00:27,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642614816] [2024-11-10 15:00:27,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642614816] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 15:00:27,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 15:00:27,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-10 15:00:27,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114906462] [2024-11-10 15:00:27,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 15:00:27,610 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-10 15:00:27,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 15:00:27,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-10 15:00:27,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-11-10 15:00:27,611 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 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) [2024-11-10 15:00:27,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 15:00:27,634 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2024-11-10 15:00:27,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-10 15:00:27,635 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 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 [2024-11-10 15:00:27,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 15:00:27,635 INFO L225 Difference]: With dead ends: 37 [2024-11-10 15:00:27,635 INFO L226 Difference]: Without dead ends: 37 [2024-11-10 15:00:27,636 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-11-10 15:00:27,636 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 1 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-10 15:00:27,637 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 57 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-10 15:00:27,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-11-10 15:00:27,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2024-11-10 15:00:27,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.3) internal successors, (39), 34 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:00:27,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2024-11-10 15:00:27,639 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 13 [2024-11-10 15:00:27,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 15:00:27,640 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2024-11-10 15:00:27,640 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 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) [2024-11-10 15:00:27,640 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2024-11-10 15:00:27,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-10 15:00:27,641 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 15:00:27,641 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 15:00:27,641 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-10 15:00:27,641 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-10 15:00:27,641 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 15:00:27,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1404930575, now seen corresponding path program 1 times [2024-11-10 15:00:27,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 15:00:27,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053319713] [2024-11-10 15:00:27,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:00:27,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 15:00:27,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:00:27,681 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:00:27,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 15:00:27,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053319713] [2024-11-10 15:00:27,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053319713] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 15:00:27,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 15:00:27,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 15:00:27,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144452167] [2024-11-10 15:00:27,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 15:00:27,682 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 15:00:27,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 15:00:27,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 15:00:27,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 15:00:27,683 INFO L87 Difference]: Start difference. First operand 35 states and 39 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) [2024-11-10 15:00:27,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 15:00:27,709 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2024-11-10 15:00:27,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 15:00:27,710 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 [2024-11-10 15:00:27,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 15:00:27,711 INFO L225 Difference]: With dead ends: 34 [2024-11-10 15:00:27,711 INFO L226 Difference]: Without dead ends: 34 [2024-11-10 15:00:27,711 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 15:00:27,711 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 7 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-10 15:00:27,712 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 37 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-10 15:00:27,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-11-10 15:00:27,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2024-11-10 15:00:27,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 33 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:00:27,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2024-11-10 15:00:27,716 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 16 [2024-11-10 15:00:27,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 15:00:27,717 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2024-11-10 15:00:27,717 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) [2024-11-10 15:00:27,717 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2024-11-10 15:00:27,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-10 15:00:27,718 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 15:00:27,718 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 15:00:27,718 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-10 15:00:27,718 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-10 15:00:27,718 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 15:00:27,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1404930574, now seen corresponding path program 1 times [2024-11-10 15:00:27,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 15:00:27,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333540826] [2024-11-10 15:00:27,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:00:27,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 15:00:27,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:00:27,856 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:00:27,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 15:00:27,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333540826] [2024-11-10 15:00:27,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333540826] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 15:00:27,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431247192] [2024-11-10 15:00:27,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:00:27,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 15:00:27,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 15:00:27,859 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) [2024-11-10 15:00:27,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-10 15:00:27,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:00:27,917 INFO L255 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-10 15:00:27,919 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 15:00:27,979 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:00:27,979 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 15:00:28,021 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2024-11-10 15:00:28,039 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:00:28,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431247192] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 15:00:28,039 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 15:00:28,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2024-11-10 15:00:28,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778910469] [2024-11-10 15:00:28,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 15:00:28,040 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-10 15:00:28,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 15:00:28,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-10 15:00:28,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-11-10 15:00:28,041 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 9 states, 8 states have (on average 3.5) internal successors, (28), 9 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) [2024-11-10 15:00:28,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 15:00:28,108 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2024-11-10 15:00:28,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-10 15:00:28,109 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.5) internal successors, (28), 9 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 16 [2024-11-10 15:00:28,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 15:00:28,109 INFO L225 Difference]: With dead ends: 44 [2024-11-10 15:00:28,109 INFO L226 Difference]: Without dead ends: 44 [2024-11-10 15:00:28,110 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-11-10 15:00:28,110 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 15 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-10 15:00:28,110 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 98 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-10 15:00:28,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-11-10 15:00:28,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 36. [2024-11-10 15:00:28,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 32 states have (on average 1.25) internal successors, (40), 35 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:00:28,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2024-11-10 15:00:28,113 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 16 [2024-11-10 15:00:28,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 15:00:28,113 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2024-11-10 15:00:28,113 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.5) internal successors, (28), 9 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) [2024-11-10 15:00:28,113 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2024-11-10 15:00:28,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-10 15:00:28,114 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 15:00:28,114 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 15:00:28,131 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-10 15:00:28,318 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 15:00:28,320 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-10 15:00:28,320 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 15:00:28,321 INFO L85 PathProgramCache]: Analyzing trace with hash -603174882, now seen corresponding path program 1 times [2024-11-10 15:00:28,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 15:00:28,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032035717] [2024-11-10 15:00:28,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:00:28,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 15:00:28,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:00:28,424 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 15:00:28,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 15:00:28,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032035717] [2024-11-10 15:00:28,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032035717] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 15:00:28,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 15:00:28,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-10 15:00:28,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452392751] [2024-11-10 15:00:28,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 15:00:28,425 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 15:00:28,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 15:00:28,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 15:00:28,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-10 15:00:28,426 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 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) [2024-11-10 15:00:28,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 15:00:28,460 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2024-11-10 15:00:28,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 15:00:28,460 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 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 17 [2024-11-10 15:00:28,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 15:00:28,461 INFO L225 Difference]: With dead ends: 35 [2024-11-10 15:00:28,461 INFO L226 Difference]: Without dead ends: 35 [2024-11-10 15:00:28,461 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-10 15:00:28,462 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 4 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-10 15:00:28,462 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 49 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-10 15:00:28,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-11-10 15:00:28,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2024-11-10 15:00:28,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 32 states have (on average 1.21875) internal successors, (39), 34 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:00:28,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2024-11-10 15:00:28,464 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 17 [2024-11-10 15:00:28,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 15:00:28,464 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2024-11-10 15:00:28,464 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 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) [2024-11-10 15:00:28,464 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2024-11-10 15:00:28,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-10 15:00:28,467 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 15:00:28,467 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 15:00:28,467 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-10 15:00:28,467 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-10 15:00:28,467 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 15:00:28,468 INFO L85 PathProgramCache]: Analyzing trace with hash -603174881, now seen corresponding path program 1 times [2024-11-10 15:00:28,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 15:00:28,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994128933] [2024-11-10 15:00:28,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:00:28,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 15:00:28,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:00:28,625 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 15:00:28,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 15:00:28,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994128933] [2024-11-10 15:00:28,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994128933] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 15:00:28,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 15:00:28,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-10 15:00:28,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217634075] [2024-11-10 15:00:28,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 15:00:28,627 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 15:00:28,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 15:00:28,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 15:00:28,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-10 15:00:28,628 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 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) [2024-11-10 15:00:28,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 15:00:28,661 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2024-11-10 15:00:28,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 15:00:28,661 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 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 17 [2024-11-10 15:00:28,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 15:00:28,662 INFO L225 Difference]: With dead ends: 50 [2024-11-10 15:00:28,662 INFO L226 Difference]: Without dead ends: 50 [2024-11-10 15:00:28,662 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-10 15:00:28,663 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 3 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-10 15:00:28,665 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 63 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-10 15:00:28,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-11-10 15:00:28,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2024-11-10 15:00:28,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 47 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:00:28,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2024-11-10 15:00:28,667 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 17 [2024-11-10 15:00:28,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 15:00:28,671 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2024-11-10 15:00:28,671 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 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) [2024-11-10 15:00:28,671 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2024-11-10 15:00:28,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-10 15:00:28,671 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 15:00:28,672 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 15:00:28,672 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-10 15:00:28,672 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-10 15:00:28,672 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 15:00:28,672 INFO L85 PathProgramCache]: Analyzing trace with hash 904376928, now seen corresponding path program 1 times [2024-11-10 15:00:28,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 15:00:28,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070085166] [2024-11-10 15:00:28,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:00:28,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 15:00:28,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:00:28,823 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 15:00:28,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 15:00:28,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070085166] [2024-11-10 15:00:28,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070085166] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 15:00:28,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 15:00:28,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-10 15:00:28,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669110301] [2024-11-10 15:00:28,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 15:00:28,824 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-10 15:00:28,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 15:00:28,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-10 15:00:28,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-10 15:00:28,825 INFO L87 Difference]: Start difference. First operand 48 states and 52 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) [2024-11-10 15:00:28,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 15:00:28,864 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2024-11-10 15:00:28,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-10 15:00:28,865 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 17 [2024-11-10 15:00:28,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 15:00:28,865 INFO L225 Difference]: With dead ends: 51 [2024-11-10 15:00:28,866 INFO L226 Difference]: Without dead ends: 51 [2024-11-10 15:00:28,866 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-10 15:00:28,866 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 3 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-10 15:00:28,867 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 63 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-10 15:00:28,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-11-10 15:00:28,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 36. [2024-11-10 15:00:28,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 35 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:00:28,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2024-11-10 15:00:28,870 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 17 [2024-11-10 15:00:28,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 15:00:28,871 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2024-11-10 15:00:28,871 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) [2024-11-10 15:00:28,871 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2024-11-10 15:00:28,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-10 15:00:28,873 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 15:00:28,873 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 15:00:28,873 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-10 15:00:28,873 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-10 15:00:28,874 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 15:00:28,874 INFO L85 PathProgramCache]: Analyzing trace with hash 960239150, now seen corresponding path program 1 times [2024-11-10 15:00:28,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 15:00:28,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901130989] [2024-11-10 15:00:28,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:00:28,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 15:00:28,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:00:29,078 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:00:29,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 15:00:29,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901130989] [2024-11-10 15:00:29,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901130989] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 15:00:29,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810250113] [2024-11-10 15:00:29,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:00:29,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 15:00:29,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 15:00:29,081 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) [2024-11-10 15:00:29,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-10 15:00:29,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:00:29,151 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-10 15:00:29,152 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 15:00:29,167 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-10 15:00:29,183 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 15:00:29,184 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-10 15:00:29,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810250113] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 15:00:29,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-10 15:00:29,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 9 [2024-11-10 15:00:29,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268406975] [2024-11-10 15:00:29,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 15:00:29,185 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-10 15:00:29,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 15:00:29,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-10 15:00:29,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-11-10 15:00:29,186 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:00:29,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 15:00:29,228 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2024-11-10 15:00:29,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-10 15:00:29,229 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2024-11-10 15:00:29,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 15:00:29,229 INFO L225 Difference]: With dead ends: 52 [2024-11-10 15:00:29,229 INFO L226 Difference]: Without dead ends: 52 [2024-11-10 15:00:29,229 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-11-10 15:00:29,230 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 4 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-10 15:00:29,230 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 81 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-10 15:00:29,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-11-10 15:00:29,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2024-11-10 15:00:29,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 47 states have (on average 1.148936170212766) internal successors, (54), 49 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:00:29,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2024-11-10 15:00:29,232 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 20 [2024-11-10 15:00:29,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 15:00:29,233 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2024-11-10 15:00:29,233 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:00:29,233 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2024-11-10 15:00:29,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-10 15:00:29,233 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 15:00:29,233 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 15:00:29,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-10 15:00:29,437 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 15:00:29,438 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-10 15:00:29,438 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 15:00:29,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1981418449, now seen corresponding path program 1 times [2024-11-10 15:00:29,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 15:00:29,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386775385] [2024-11-10 15:00:29,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:00:29,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 15:00:29,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:00:29,654 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:00:29,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 15:00:29,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386775385] [2024-11-10 15:00:29,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386775385] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 15:00:29,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674924170] [2024-11-10 15:00:29,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:00:29,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 15:00:29,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 15:00:29,657 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) [2024-11-10 15:00:29,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-10 15:00:29,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:00:29,734 INFO L255 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-10 15:00:29,737 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 15:00:29,767 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-10 15:00:29,788 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 15:00:29,788 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-10 15:00:29,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674924170] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 15:00:29,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-10 15:00:29,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 11 [2024-11-10 15:00:29,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121422601] [2024-11-10 15:00:29,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 15:00:29,789 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-10 15:00:29,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 15:00:29,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-10 15:00:29,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-11-10 15:00:29,790 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:00:29,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 15:00:29,857 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2024-11-10 15:00:29,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-10 15:00:29,858 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2024-11-10 15:00:29,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 15:00:29,858 INFO L225 Difference]: With dead ends: 60 [2024-11-10 15:00:29,858 INFO L226 Difference]: Without dead ends: 60 [2024-11-10 15:00:29,858 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-11-10 15:00:29,859 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 5 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-10 15:00:29,859 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 109 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-10 15:00:29,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-11-10 15:00:29,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 43. [2024-11-10 15:00:29,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 40 states have (on average 1.175) internal successors, (47), 42 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:00:29,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2024-11-10 15:00:29,861 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 20 [2024-11-10 15:00:29,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 15:00:29,861 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2024-11-10 15:00:29,861 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:00:29,861 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2024-11-10 15:00:29,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-10 15:00:29,863 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 15:00:29,863 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 15:00:29,879 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-10 15:00:30,063 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-10 15:00:30,064 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-10 15:00:30,064 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 15:00:30,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1316476494, now seen corresponding path program 1 times [2024-11-10 15:00:30,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 15:00:30,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458041968] [2024-11-10 15:00:30,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:00:30,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 15:00:30,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:00:30,252 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:00:30,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 15:00:30,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458041968] [2024-11-10 15:00:30,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458041968] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 15:00:30,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964508466] [2024-11-10 15:00:30,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:00:30,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 15:00:30,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 15:00:30,255 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) [2024-11-10 15:00:30,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-10 15:00:30,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:00:30,334 INFO L255 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-10 15:00:30,336 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 15:00:30,398 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-10 15:00:30,417 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:00:30,418 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 15:00:30,430 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 [2024-11-10 15:00:30,435 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 14 treesize of output 12 [2024-11-10 15:00:30,494 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:00:30,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964508466] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 15:00:30,495 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 15:00:30,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2024-11-10 15:00:30,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286281064] [2024-11-10 15:00:30,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 15:00:30,495 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-10 15:00:30,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 15:00:30,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-10 15:00:30,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2024-11-10 15:00:30,498 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:00:30,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 15:00:30,616 INFO L93 Difference]: Finished difference Result 65 states and 70 transitions. [2024-11-10 15:00:30,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-10 15:00:30,617 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2024-11-10 15:00:30,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 15:00:30,618 INFO L225 Difference]: With dead ends: 65 [2024-11-10 15:00:30,618 INFO L226 Difference]: Without dead ends: 65 [2024-11-10 15:00:30,619 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2024-11-10 15:00:30,619 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 32 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-10 15:00:30,619 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 86 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-10 15:00:30,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-11-10 15:00:30,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 47. [2024-11-10 15:00:30,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 44 states have (on average 1.1818181818181819) internal successors, (52), 46 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:00:30,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 52 transitions. [2024-11-10 15:00:30,621 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 52 transitions. Word has length 20 [2024-11-10 15:00:30,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 15:00:30,623 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 52 transitions. [2024-11-10 15:00:30,623 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:00:30,623 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 52 transitions. [2024-11-10 15:00:30,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-10 15:00:30,624 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 15:00:30,624 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 15:00:30,642 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-10 15:00:30,825 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 15:00:30,825 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-10 15:00:30,825 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 15:00:30,825 INFO L85 PathProgramCache]: Analyzing trace with hash -630331670, now seen corresponding path program 1 times [2024-11-10 15:00:30,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 15:00:30,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951883860] [2024-11-10 15:00:30,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:00:30,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 15:00:30,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:00:30,927 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 15:00:30,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 15:00:30,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951883860] [2024-11-10 15:00:30,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951883860] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 15:00:30,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 15:00:30,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 15:00:30,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474625449] [2024-11-10 15:00:30,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 15:00:30,929 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 15:00:30,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 15:00:30,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 15:00:30,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 15:00:30,930 INFO L87 Difference]: Start difference. First operand 47 states and 52 transitions. Second operand has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 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) [2024-11-10 15:00:30,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 15:00:30,945 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2024-11-10 15:00:30,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 15:00:30,946 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 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 22 [2024-11-10 15:00:30,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 15:00:30,946 INFO L225 Difference]: With dead ends: 46 [2024-11-10 15:00:30,946 INFO L226 Difference]: Without dead ends: 27 [2024-11-10 15:00:30,946 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 15:00:30,947 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 5 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 36 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 [2024-11-10 15:00:30,948 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 36 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-10 15:00:30,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-11-10 15:00:30,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-11-10 15:00:30,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 25 states have (on average 1.12) internal successors, (28), 26 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) [2024-11-10 15:00:30,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2024-11-10 15:00:30,949 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 22 [2024-11-10 15:00:30,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 15:00:30,949 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2024-11-10 15:00:30,949 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 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) [2024-11-10 15:00:30,949 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2024-11-10 15:00:30,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-10 15:00:30,949 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 15:00:30,950 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 15:00:30,950 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-10 15:00:30,950 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-10 15:00:30,954 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 15:00:30,954 INFO L85 PathProgramCache]: Analyzing trace with hash -2100097104, now seen corresponding path program 2 times [2024-11-10 15:00:30,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 15:00:30,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896620403] [2024-11-10 15:00:30,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:00:30,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 15:00:30,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:00:31,130 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:00:31,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 15:00:31,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896620403] [2024-11-10 15:00:31,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896620403] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 15:00:31,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074206727] [2024-11-10 15:00:31,130 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-10 15:00:31,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 15:00:31,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 15:00:31,132 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) [2024-11-10 15:00:31,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-10 15:00:31,211 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-10 15:00:31,211 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 15:00:31,212 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-10 15:00:31,214 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 15:00:31,225 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 [2024-11-10 15:00:31,343 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:00:31,343 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 15:00:31,559 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:00:31,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074206727] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 15:00:31,559 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 15:00:31,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 17 [2024-11-10 15:00:31,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464164183] [2024-11-10 15:00:31,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 15:00:31,560 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-10 15:00:31,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 15:00:31,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-10 15:00:31,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2024-11-10 15:00:31,560 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 18 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 18 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) [2024-11-10 15:00:31,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 15:00:31,698 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2024-11-10 15:00:31,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-10 15:00:31,699 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 18 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 24 [2024-11-10 15:00:31,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 15:00:31,699 INFO L225 Difference]: With dead ends: 34 [2024-11-10 15:00:31,699 INFO L226 Difference]: Without dead ends: 34 [2024-11-10 15:00:31,700 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2024-11-10 15:00:31,701 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 8 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-10 15:00:31,701 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 81 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-10 15:00:31,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-11-10 15:00:31,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 30. [2024-11-10 15:00:31,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 29 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:00:31,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2024-11-10 15:00:31,703 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 24 [2024-11-10 15:00:31,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 15:00:31,704 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2024-11-10 15:00:31,704 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 18 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) [2024-11-10 15:00:31,704 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2024-11-10 15:00:31,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-10 15:00:31,704 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 15:00:31,705 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 15:00:31,722 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-10 15:00:31,905 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,SelfDestructingSolverStorable20 [2024-11-10 15:00:31,905 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-10 15:00:31,906 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 15:00:31,906 INFO L85 PathProgramCache]: Analyzing trace with hash -678500831, now seen corresponding path program 1 times [2024-11-10 15:00:31,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 15:00:31,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212592385] [2024-11-10 15:00:31,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:00:31,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 15:00:31,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:00:32,169 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:00:32,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 15:00:32,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212592385] [2024-11-10 15:00:32,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212592385] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 15:00:32,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193227232] [2024-11-10 15:00:32,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:00:32,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 15:00:32,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 15:00:32,172 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) [2024-11-10 15:00:32,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-10 15:00:32,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:00:32,250 INFO L255 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-10 15:00:32,253 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 15:00:32,303 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 [2024-11-10 15:00:32,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-10 15:00:32,309 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-10 15:00:32,696 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:00:32,697 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 15:00:32,916 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-10 15:00:32,957 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:00:32,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193227232] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 15:00:32,958 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 15:00:32,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 21 [2024-11-10 15:00:32,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147427026] [2024-11-10 15:00:32,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 15:00:32,958 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-10 15:00:32,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 15:00:32,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-10 15:00:32,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2024-11-10 15:00:32,959 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 22 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 22 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) [2024-11-10 15:00:33,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 15:00:33,154 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2024-11-10 15:00:33,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-10 15:00:33,155 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2024-11-10 15:00:33,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 15:00:33,155 INFO L225 Difference]: With dead ends: 32 [2024-11-10 15:00:33,156 INFO L226 Difference]: Without dead ends: 32 [2024-11-10 15:00:33,156 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2024-11-10 15:00:33,157 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 3 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-10 15:00:33,157 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 96 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-10 15:00:33,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-11-10 15:00:33,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2024-11-10 15:00:33,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 29 states have (on average 1.103448275862069) internal successors, (32), 30 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:00:33,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2024-11-10 15:00:33,158 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 25 [2024-11-10 15:00:33,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 15:00:33,158 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2024-11-10 15:00:33,158 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 22 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) [2024-11-10 15:00:33,158 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2024-11-10 15:00:33,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-10 15:00:33,159 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 15:00:33,159 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 15:00:33,176 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-10 15:00:33,359 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,SelfDestructingSolverStorable21 [2024-11-10 15:00:33,360 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-10 15:00:33,360 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 15:00:33,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1102208788, now seen corresponding path program 3 times [2024-11-10 15:00:33,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 15:00:33,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890620149] [2024-11-10 15:00:33,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:00:33,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 15:00:33,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:00:33,641 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:00:33,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 15:00:33,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890620149] [2024-11-10 15:00:33,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890620149] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 15:00:33,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586829816] [2024-11-10 15:00:33,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-10 15:00:33,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 15:00:33,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 15:00:33,644 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) [2024-11-10 15:00:33,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-10 15:00:33,729 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-10 15:00:33,729 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 15:00:33,731 INFO L255 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-10 15:00:33,732 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 15:00:33,823 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 [2024-11-10 15:00:33,893 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:00:33,893 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 15:00:33,910 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 [2024-11-10 15:00:33,912 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 [2024-11-10 15:00:33,980 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:00:33,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586829816] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 15:00:33,980 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 15:00:33,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2024-11-10 15:00:33,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769808732] [2024-11-10 15:00:33,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 15:00:33,981 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-10 15:00:33,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 15:00:33,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-10 15:00:33,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2024-11-10 15:00:33,982 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand has 22 states, 22 states have (on average 2.5) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:00:34,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 15:00:34,164 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2024-11-10 15:00:34,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-10 15:00:34,164 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2024-11-10 15:00:34,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 15:00:34,164 INFO L225 Difference]: With dead ends: 48 [2024-11-10 15:00:34,165 INFO L226 Difference]: Without dead ends: 37 [2024-11-10 15:00:34,165 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2024-11-10 15:00:34,166 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 10 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-10 15:00:34,166 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 151 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-10 15:00:34,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-11-10 15:00:34,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2024-11-10 15:00:34,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 34 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:00:34,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2024-11-10 15:00:34,168 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 28 [2024-11-10 15:00:34,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 15:00:34,169 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2024-11-10 15:00:34,169 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:00:34,169 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2024-11-10 15:00:34,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-10 15:00:34,169 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 15:00:34,169 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 15:00:34,188 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-10 15:00:34,370 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,SelfDestructingSolverStorable22 [2024-11-10 15:00:34,370 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-10 15:00:34,371 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 15:00:34,371 INFO L85 PathProgramCache]: Analyzing trace with hash 1720866894, now seen corresponding path program 4 times [2024-11-10 15:00:34,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 15:00:34,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600538395] [2024-11-10 15:00:34,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:00:34,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 15:00:34,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:00:34,630 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:00:34,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 15:00:34,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600538395] [2024-11-10 15:00:34,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600538395] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 15:00:34,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281660029] [2024-11-10 15:00:34,631 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-10 15:00:34,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 15:00:34,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 15:00:34,633 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) [2024-11-10 15:00:34,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-10 15:00:34,723 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-10 15:00:34,723 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 15:00:34,724 INFO L255 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-10 15:00:34,726 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 15:00:34,823 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 [2024-11-10 15:00:35,111 INFO L349 Elim1Store]: treesize reduction 4, result has 82.6 percent of original size [2024-11-10 15:00:35,111 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 29 [2024-11-10 15:00:35,182 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-10 15:00:35,182 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 15:00:35,467 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2024-11-10 15:00:35,476 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 39 [2024-11-10 15:00:35,728 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 [2024-11-10 15:00:35,752 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-10 15:00:35,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281660029] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 15:00:35,753 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 15:00:35,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 27 [2024-11-10 15:00:35,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792249562] [2024-11-10 15:00:35,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 15:00:35,754 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-10 15:00:35,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 15:00:35,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-10 15:00:35,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2024-11-10 15:00:35,755 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand has 28 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:00:36,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 15:00:36,430 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2024-11-10 15:00:36,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-10 15:00:36,431 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2024-11-10 15:00:36,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 15:00:36,431 INFO L225 Difference]: With dead ends: 36 [2024-11-10 15:00:36,431 INFO L226 Difference]: Without dead ends: 36 [2024-11-10 15:00:36,432 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=254, Invalid=1552, Unknown=0, NotChecked=0, Total=1806 [2024-11-10 15:00:36,432 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 20 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-10 15:00:36,432 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 140 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-10 15:00:36,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-11-10 15:00:36,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2024-11-10 15:00:36,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:00:36,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2024-11-10 15:00:36,434 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 32 [2024-11-10 15:00:36,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 15:00:36,434 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2024-11-10 15:00:36,434 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:00:36,434 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2024-11-10 15:00:36,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-10 15:00:36,437 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 15:00:36,437 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 15:00:36,453 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-10 15:00:36,641 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,SelfDestructingSolverStorable23 [2024-11-10 15:00:36,642 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-10 15:00:36,642 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 15:00:36,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1807266115, now seen corresponding path program 2 times [2024-11-10 15:00:36,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 15:00:36,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349556144] [2024-11-10 15:00:36,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:00:36,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 15:00:36,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:00:36,957 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:00:36,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 15:00:36,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349556144] [2024-11-10 15:00:36,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349556144] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 15:00:36,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176037392] [2024-11-10 15:00:36,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-10 15:00:36,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 15:00:36,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 15:00:36,960 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 15:00:36,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-10 15:00:37,053 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-10 15:00:37,053 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 15:00:37,055 INFO L255 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-11-10 15:00:37,057 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 15:00:37,095 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 [2024-11-10 15:00:37,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-10 15:00:37,113 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-10 15:00:37,633 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:00:37,633 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 15:00:37,986 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-10 15:00:38,028 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:00:38,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176037392] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 15:00:38,029 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 15:00:38,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 30 [2024-11-10 15:00:38,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123754141] [2024-11-10 15:00:38,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 15:00:38,030 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-10 15:00:38,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 15:00:38,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-10 15:00:38,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=809, Unknown=0, NotChecked=0, Total=930 [2024-11-10 15:00:38,032 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand has 31 states, 30 states have (on average 3.2333333333333334) internal successors, (97), 31 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) [2024-11-10 15:00:38,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 15:00:38,383 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2024-11-10 15:00:38,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-10 15:00:38,383 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 3.2333333333333334) internal successors, (97), 31 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 33 [2024-11-10 15:00:38,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 15:00:38,383 INFO L225 Difference]: With dead ends: 45 [2024-11-10 15:00:38,383 INFO L226 Difference]: Without dead ends: 45 [2024-11-10 15:00:38,384 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=162, Invalid=1028, Unknown=0, NotChecked=0, Total=1190 [2024-11-10 15:00:38,384 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 25 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-10 15:00:38,384 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 159 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-10 15:00:38,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-11-10 15:00:38,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 38. [2024-11-10 15:00:38,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.054054054054054) internal successors, (39), 37 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:00:38,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2024-11-10 15:00:38,386 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 33 [2024-11-10 15:00:38,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 15:00:38,386 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2024-11-10 15:00:38,386 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 3.2333333333333334) internal successors, (97), 31 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) [2024-11-10 15:00:38,386 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2024-11-10 15:00:38,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-10 15:00:38,386 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 15:00:38,386 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 15:00:38,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-10 15:00:38,587 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 15:00:38,587 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-10 15:00:38,588 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 15:00:38,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1852709241, now seen corresponding path program 3 times [2024-11-10 15:00:38,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 15:00:38,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538873456] [2024-11-10 15:00:38,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:00:38,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 15:00:38,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:00:38,951 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 11 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:00:38,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 15:00:38,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538873456] [2024-11-10 15:00:38,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538873456] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 15:00:38,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77984272] [2024-11-10 15:00:38,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-10 15:00:38,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 15:00:38,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 15:00:38,953 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) [2024-11-10 15:00:38,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-10 15:00:39,049 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-10 15:00:39,049 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 15:00:39,051 INFO L255 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-10 15:00:39,053 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 15:00:39,197 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-10 15:00:39,308 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-10 15:00:39,330 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 9 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:00:39,331 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 15:00:39,447 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 [2024-11-10 15:00:39,449 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 [2024-11-10 15:00:39,629 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 9 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:00:39,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77984272] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 15:00:39,629 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 15:00:39,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 34 [2024-11-10 15:00:39,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805640677] [2024-11-10 15:00:39,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 15:00:39,630 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-10 15:00:39,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 15:00:39,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-10 15:00:39,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1031, Unknown=0, NotChecked=0, Total=1122 [2024-11-10 15:00:39,631 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand has 34 states, 34 states have (on average 2.8529411764705883) internal successors, (97), 34 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) [2024-11-10 15:00:40,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 15:00:40,169 INFO L93 Difference]: Finished difference Result 59 states and 60 transitions. [2024-11-10 15:00:40,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-10 15:00:40,169 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.8529411764705883) internal successors, (97), 34 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 37 [2024-11-10 15:00:40,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 15:00:40,169 INFO L225 Difference]: With dead ends: 59 [2024-11-10 15:00:40,169 INFO L226 Difference]: Without dead ends: 44 [2024-11-10 15:00:40,170 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=187, Invalid=1975, Unknown=0, NotChecked=0, Total=2162 [2024-11-10 15:00:40,170 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 15 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-10 15:00:40,171 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 209 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-10 15:00:40,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-11-10 15:00:40,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2024-11-10 15:00:40,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.048780487804878) internal successors, (43), 41 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:00:40,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2024-11-10 15:00:40,172 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 37 [2024-11-10 15:00:40,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 15:00:40,172 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2024-11-10 15:00:40,173 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.8529411764705883) internal successors, (97), 34 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) [2024-11-10 15:00:40,173 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2024-11-10 15:00:40,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-10 15:00:40,173 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 15:00:40,173 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 15:00:40,190 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-10 15:00:40,374 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,SelfDestructingSolverStorable25 [2024-11-10 15:00:40,374 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-10 15:00:40,374 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 15:00:40,375 INFO L85 PathProgramCache]: Analyzing trace with hash -104309403, now seen corresponding path program 4 times [2024-11-10 15:00:40,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 15:00:40,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531063262] [2024-11-10 15:00:40,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:00:40,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 15:00:40,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:00:40,766 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:00:40,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 15:00:40,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531063262] [2024-11-10 15:00:40,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531063262] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 15:00:40,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978978484] [2024-11-10 15:00:40,766 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-10 15:00:40,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 15:00:40,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 15:00:40,768 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 15:00:40,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-10 15:00:40,883 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-10 15:00:40,884 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 15:00:40,885 INFO L255 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-11-10 15:00:40,887 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 15:00:40,921 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-10 15:00:40,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-10 15:00:40,926 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-10 15:00:41,583 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 18 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:00:41,584 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 15:00:42,074 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-10 15:00:42,136 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 32 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:00:42,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978978484] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 15:00:42,137 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 15:00:42,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 12] total 33 [2024-11-10 15:00:42,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692038645] [2024-11-10 15:00:42,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 15:00:42,137 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-10 15:00:42,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 15:00:42,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-10 15:00:42,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=976, Unknown=0, NotChecked=0, Total=1122 [2024-11-10 15:00:42,138 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand has 34 states, 33 states have (on average 3.6666666666666665) internal successors, (121), 34 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:00:42,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 15:00:42,443 INFO L93 Difference]: Finished difference Result 47 states and 48 transitions. [2024-11-10 15:00:42,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-10 15:00:42,443 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 3.6666666666666665) internal successors, (121), 34 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2024-11-10 15:00:42,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 15:00:42,443 INFO L225 Difference]: With dead ends: 47 [2024-11-10 15:00:42,443 INFO L226 Difference]: Without dead ends: 47 [2024-11-10 15:00:42,444 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=167, Invalid=1093, Unknown=0, NotChecked=0, Total=1260 [2024-11-10 15:00:42,444 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 6 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-10 15:00:42,445 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 187 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 493 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-10 15:00:42,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-11-10 15:00:42,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2024-11-10 15:00:42,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.0444444444444445) internal successors, (47), 45 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:00:42,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2024-11-10 15:00:42,447 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 41 [2024-11-10 15:00:42,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 15:00:42,447 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2024-11-10 15:00:42,447 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 3.6666666666666665) internal successors, (121), 34 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:00:42,447 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2024-11-10 15:00:42,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-10 15:00:42,447 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 15:00:42,447 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 15:00:42,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-10 15:00:42,648 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,SelfDestructingSolverStorable26 [2024-11-10 15:00:42,648 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-10 15:00:42,648 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 15:00:42,648 INFO L85 PathProgramCache]: Analyzing trace with hash -104156759, now seen corresponding path program 5 times [2024-11-10 15:00:42,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 15:00:42,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946610383] [2024-11-10 15:00:42,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:00:42,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 15:00:42,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:00:43,107 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 22 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:00:43,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 15:00:43,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946610383] [2024-11-10 15:00:43,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946610383] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 15:00:43,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60247162] [2024-11-10 15:00:43,108 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-10 15:00:43,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 15:00:43,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 15:00:43,110 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) [2024-11-10 15:00:43,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-10 15:00:43,241 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-10 15:00:43,242 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 15:00:43,243 INFO L255 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-10 15:00:43,245 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 15:00:43,390 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 [2024-11-10 15:00:43,534 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 12 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:00:43,534 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 15:00:43,564 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 [2024-11-10 15:00:43,566 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 [2024-11-10 15:00:43,664 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 12 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:00:43,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60247162] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 15:00:43,665 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 15:00:43,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 30 [2024-11-10 15:00:43,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371252163] [2024-11-10 15:00:43,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 15:00:43,665 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-10 15:00:43,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 15:00:43,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-10 15:00:43,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=795, Unknown=0, NotChecked=0, Total=870 [2024-11-10 15:00:43,666 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand has 30 states, 30 states have (on average 3.0) internal successors, (90), 30 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:00:44,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 15:00:44,240 INFO L93 Difference]: Finished difference Result 71 states and 72 transitions. [2024-11-10 15:00:44,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-10 15:00:44,240 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.0) internal successors, (90), 30 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2024-11-10 15:00:44,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 15:00:44,241 INFO L225 Difference]: With dead ends: 71 [2024-11-10 15:00:44,241 INFO L226 Difference]: Without dead ends: 52 [2024-11-10 15:00:44,241 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=180, Invalid=1800, Unknown=0, NotChecked=0, Total=1980 [2024-11-10 15:00:44,242 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 15 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-10 15:00:44,242 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 278 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 601 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-10 15:00:44,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-11-10 15:00:44,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2024-11-10 15:00:44,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 49 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:00:44,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2024-11-10 15:00:44,244 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 45 [2024-11-10 15:00:44,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 15:00:44,244 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2024-11-10 15:00:44,244 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.0) internal successors, (90), 30 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:00:44,244 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2024-11-10 15:00:44,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-10 15:00:44,245 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 15:00:44,245 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 15:00:44,261 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-10 15:00:44,448 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,SelfDestructingSolverStorable27 [2024-11-10 15:00:44,449 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-10 15:00:44,449 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 15:00:44,449 INFO L85 PathProgramCache]: Analyzing trace with hash -360486265, now seen corresponding path program 6 times [2024-11-10 15:00:44,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 15:00:44,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465287321] [2024-11-10 15:00:44,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:00:44,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 15:00:44,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:00:44,944 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 18 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:00:44,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 15:00:44,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465287321] [2024-11-10 15:00:44,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465287321] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 15:00:44,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705400767] [2024-11-10 15:00:44,945 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-10 15:00:44,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 15:00:44,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 15:00:44,948 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) [2024-11-10 15:00:44,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-10 15:00:45,147 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-11-10 15:00:45,147 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 15:00:45,149 INFO L255 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-11-10 15:00:45,151 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 15:00:45,182 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 [2024-11-10 15:00:45,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-10 15:00:45,187 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-10 15:00:45,592 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 32 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:00:45,592 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 15:00:46,056 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-10 15:00:46,104 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 50 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:00:46,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705400767] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 15:00:46,105 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 15:00:46,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 40 [2024-11-10 15:00:46,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361081887] [2024-11-10 15:00:46,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 15:00:46,105 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-11-10 15:00:46,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 15:00:46,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-11-10 15:00:46,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1473, Unknown=0, NotChecked=0, Total=1640 [2024-11-10 15:00:46,106 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand has 41 states, 40 states have (on average 3.625) internal successors, (145), 41 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:00:46,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 15:00:46,645 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2024-11-10 15:00:46,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-10 15:00:46,645 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 3.625) internal successors, (145), 41 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2024-11-10 15:00:46,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 15:00:46,646 INFO L225 Difference]: With dead ends: 55 [2024-11-10 15:00:46,646 INFO L226 Difference]: Without dead ends: 55 [2024-11-10 15:00:46,646 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=311, Invalid=2445, Unknown=0, NotChecked=0, Total=2756 [2024-11-10 15:00:46,647 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 25 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 665 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-10 15:00:46,647 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 255 Invalid, 675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 665 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-10 15:00:46,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-11-10 15:00:46,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2024-11-10 15:00:46,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.0377358490566038) internal successors, (55), 53 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:00:46,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2024-11-10 15:00:46,649 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 49 [2024-11-10 15:00:46,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 15:00:46,649 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2024-11-10 15:00:46,649 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 3.625) internal successors, (145), 41 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:00:46,649 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2024-11-10 15:00:46,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-10 15:00:46,649 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 15:00:46,649 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 15:00:46,665 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-10 15:00:46,850 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,SelfDestructingSolverStorable28 [2024-11-10 15:00:46,850 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-10 15:00:46,850 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 15:00:46,850 INFO L85 PathProgramCache]: Analyzing trace with hash -837394997, now seen corresponding path program 7 times [2024-11-10 15:00:46,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 15:00:46,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048399099] [2024-11-10 15:00:46,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:00:46,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 15:00:46,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:00:47,514 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 37 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:00:47,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 15:00:47,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048399099] [2024-11-10 15:00:47,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048399099] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 15:00:47,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259520411] [2024-11-10 15:00:47,515 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-10 15:00:47,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 15:00:47,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 15:00:47,516 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) [2024-11-10 15:00:47,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-10 15:00:47,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:00:47,614 INFO L255 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-11-10 15:00:47,616 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 15:00:47,757 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 [2024-11-10 15:00:47,910 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 15 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:00:47,910 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 15:00:47,937 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 [2024-11-10 15:00:47,939 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 [2024-11-10 15:00:48,018 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 15 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:00:48,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259520411] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 15:00:48,018 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 15:00:48,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2024-11-10 15:00:48,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298026245] [2024-11-10 15:00:48,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 15:00:48,019 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-10 15:00:48,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 15:00:48,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-10 15:00:48,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1035, Unknown=0, NotChecked=0, Total=1122 [2024-11-10 15:00:48,020 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand has 34 states, 34 states have (on average 3.1176470588235294) internal successors, (106), 34 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:00:48,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 15:00:48,678 INFO L93 Difference]: Finished difference Result 83 states and 84 transitions. [2024-11-10 15:00:48,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-10 15:00:48,678 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.1176470588235294) internal successors, (106), 34 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2024-11-10 15:00:48,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 15:00:48,679 INFO L225 Difference]: With dead ends: 83 [2024-11-10 15:00:48,679 INFO L226 Difference]: Without dead ends: 60 [2024-11-10 15:00:48,680 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=221, Invalid=2431, Unknown=0, NotChecked=0, Total=2652 [2024-11-10 15:00:48,680 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 15 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 850 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 850 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-10 15:00:48,680 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 372 Invalid, 863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 850 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-10 15:00:48,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-11-10 15:00:48,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2024-11-10 15:00:48,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.0350877192982457) internal successors, (59), 57 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:00:48,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2024-11-10 15:00:48,682 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 53 [2024-11-10 15:00:48,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 15:00:48,682 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2024-11-10 15:00:48,682 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.1176470588235294) internal successors, (106), 34 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:00:48,682 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2024-11-10 15:00:48,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-11-10 15:00:48,682 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 15:00:48,682 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 15:00:48,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-11-10 15:00:48,883 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 15:00:48,883 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-10 15:00:48,883 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 15:00:48,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1240422569, now seen corresponding path program 8 times [2024-11-10 15:00:48,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 15:00:48,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617922654] [2024-11-10 15:00:48,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:00:48,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 15:00:48,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:00:49,473 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 32 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:00:49,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 15:00:49,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617922654] [2024-11-10 15:00:49,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617922654] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 15:00:49,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578408804] [2024-11-10 15:00:49,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-10 15:00:49,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 15:00:49,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 15:00:49,476 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) [2024-11-10 15:00:49,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-10 15:00:49,661 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-10 15:00:49,661 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 15:00:49,663 INFO L255 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 74 conjuncts are in the unsatisfiable core [2024-11-10 15:00:49,666 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 15:00:49,710 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 [2024-11-10 15:00:49,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-10 15:00:49,715 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-10 15:00:50,666 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:00:50,666 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 15:00:51,404 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-10 15:00:51,448 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:00:51,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578408804] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 15:00:51,449 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 15:00:51,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 18] total 49 [2024-11-10 15:00:51,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290125990] [2024-11-10 15:00:51,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 15:00:51,449 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-11-10 15:00:51,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 15:00:51,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-11-10 15:00:51,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=2170, Unknown=0, NotChecked=0, Total=2450 [2024-11-10 15:00:51,451 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand has 50 states, 49 states have (on average 3.4489795918367347) internal successors, (169), 50 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:00:52,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 15:00:52,026 INFO L93 Difference]: Finished difference Result 69 states and 71 transitions. [2024-11-10 15:00:52,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-10 15:00:52,026 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 3.4489795918367347) internal successors, (169), 50 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2024-11-10 15:00:52,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 15:00:52,027 INFO L225 Difference]: With dead ends: 69 [2024-11-10 15:00:52,027 INFO L226 Difference]: Without dead ends: 69 [2024-11-10 15:00:52,028 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 921 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=366, Invalid=2826, Unknown=0, NotChecked=0, Total=3192 [2024-11-10 15:00:52,028 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 22 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 847 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 847 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-10 15:00:52,028 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 304 Invalid, 853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 847 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-10 15:00:52,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-11-10 15:00:52,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 62. [2024-11-10 15:00:52,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 61 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) [2024-11-10 15:00:52,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2024-11-10 15:00:52,034 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 57 [2024-11-10 15:00:52,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 15:00:52,034 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2024-11-10 15:00:52,034 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 3.4489795918367347) internal successors, (169), 50 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:00:52,034 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2024-11-10 15:00:52,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-11-10 15:00:52,035 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 15:00:52,035 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 15:00:52,052 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-10 15:00:52,235 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2024-11-10 15:00:52,236 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-10 15:00:52,236 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 15:00:52,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1682281747, now seen corresponding path program 9 times [2024-11-10 15:00:52,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 15:00:52,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770441193] [2024-11-10 15:00:52,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:00:52,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 15:00:52,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:00:52,794 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 56 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:00:52,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 15:00:52,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770441193] [2024-11-10 15:00:52,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770441193] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 15:00:52,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620630145] [2024-11-10 15:00:52,795 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-10 15:00:52,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 15:00:52,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 15:00:52,796 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 15:00:52,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-10 15:00:52,981 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-11-10 15:00:52,981 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 15:00:52,983 INFO L255 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 54 conjuncts are in the unsatisfiable core [2024-11-10 15:00:52,984 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 15:00:53,218 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-10 15:00:53,470 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 18 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:00:53,470 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 15:00:53,684 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 [2024-11-10 15:00:53,687 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 [2024-11-10 15:00:53,965 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 18 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:00:53,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620630145] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 15:00:53,966 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 15:00:53,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 52 [2024-11-10 15:00:53,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37158238] [2024-11-10 15:00:53,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 15:00:53,966 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2024-11-10 15:00:53,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 15:00:53,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2024-11-10 15:00:53,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=2507, Unknown=0, NotChecked=0, Total=2652 [2024-11-10 15:00:53,968 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand has 52 states, 52 states have (on average 3.25) internal successors, (169), 52 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:00:55,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 15:00:55,056 INFO L93 Difference]: Finished difference Result 95 states and 96 transitions. [2024-11-10 15:00:55,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-10 15:00:55,057 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 3.25) internal successors, (169), 52 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2024-11-10 15:00:55,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 15:00:55,057 INFO L225 Difference]: With dead ends: 95 [2024-11-10 15:00:55,057 INFO L226 Difference]: Without dead ends: 68 [2024-11-10 15:00:55,059 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 822 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=337, Invalid=5065, Unknown=0, NotChecked=0, Total=5402 [2024-11-10 15:00:55,059 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 19 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 1296 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 566 SdHoareTripleChecker+Invalid, 1314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-10 15:00:55,059 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 566 Invalid, 1314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1296 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-10 15:00:55,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-11-10 15:00:55,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2024-11-10 15:00:55,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.0307692307692307) internal successors, (67), 65 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:00:55,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2024-11-10 15:00:55,061 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 61 [2024-11-10 15:00:55,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 15:00:55,061 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2024-11-10 15:00:55,061 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 3.25) internal successors, (169), 52 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:00:55,062 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2024-11-10 15:00:55,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-11-10 15:00:55,062 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 15:00:55,062 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 15:00:55,075 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-10 15:00:55,263 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 15:00:55,263 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-10 15:00:55,263 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 15:00:55,263 INFO L85 PathProgramCache]: Analyzing trace with hash 659662795, now seen corresponding path program 10 times [2024-11-10 15:00:55,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 15:00:55,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522676446] [2024-11-10 15:00:55,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:00:55,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 15:00:55,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:00:55,908 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 50 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:00:55,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 15:00:55,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522676446] [2024-11-10 15:00:55,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522676446] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 15:00:55,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183503763] [2024-11-10 15:00:55,908 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-10 15:00:55,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 15:00:55,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 15:00:55,909 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 15:00:55,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-10 15:00:56,128 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-10 15:00:56,128 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 15:00:56,133 INFO L255 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 75 conjuncts are in the unsatisfiable core [2024-11-10 15:00:56,135 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 15:00:56,176 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 [2024-11-10 15:00:56,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-10 15:00:56,181 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-10 15:00:57,077 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 72 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:00:57,078 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 15:00:57,889 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-10 15:00:57,932 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 98 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:00:57,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183503763] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 15:00:57,932 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 15:00:57,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 18] total 51 [2024-11-10 15:00:57,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128120355] [2024-11-10 15:00:57,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 15:00:57,933 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2024-11-10 15:00:57,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 15:00:57,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2024-11-10 15:00:57,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=2321, Unknown=0, NotChecked=0, Total=2652 [2024-11-10 15:00:57,934 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand has 52 states, 51 states have (on average 3.784313725490196) internal successors, (193), 52 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:00:58,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 15:00:58,401 INFO L93 Difference]: Finished difference Result 71 states and 72 transitions. [2024-11-10 15:00:58,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-10 15:00:58,402 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 3.784313725490196) internal successors, (193), 52 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2024-11-10 15:00:58,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 15:00:58,402 INFO L225 Difference]: With dead ends: 71 [2024-11-10 15:00:58,402 INFO L226 Difference]: Without dead ends: 71 [2024-11-10 15:00:58,403 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 806 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=361, Invalid=2501, Unknown=0, NotChecked=0, Total=2862 [2024-11-10 15:00:58,403 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 6 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 982 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 982 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-10 15:00:58,403 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 362 Invalid, 983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 982 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-10 15:00:58,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-11-10 15:00:58,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2024-11-10 15:00:58,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.0289855072463767) internal successors, (71), 69 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) [2024-11-10 15:00:58,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2024-11-10 15:00:58,405 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 65 [2024-11-10 15:00:58,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 15:00:58,405 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2024-11-10 15:00:58,405 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 51 states have (on average 3.784313725490196) internal successors, (193), 52 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:00:58,405 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2024-11-10 15:00:58,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-11-10 15:00:58,405 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 15:00:58,405 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 15:00:58,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-11-10 15:00:58,606 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 15:00:58,606 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-10 15:00:58,606 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 15:00:58,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1396463887, now seen corresponding path program 11 times [2024-11-10 15:00:58,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 15:00:58,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140397390] [2024-11-10 15:00:58,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:00:58,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 15:00:58,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:00:59,281 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 79 proven. 124 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:00:59,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 15:00:59,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140397390] [2024-11-10 15:00:59,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140397390] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 15:00:59,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487920040] [2024-11-10 15:00:59,282 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-10 15:00:59,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 15:00:59,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 15:00:59,285 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 15:00:59,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-10 15:00:59,530 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-11-10 15:00:59,530 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 15:00:59,532 INFO L255 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 58 conjuncts are in the unsatisfiable core [2024-11-10 15:00:59,534 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 15:00:59,738 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 [2024-11-10 15:00:59,956 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-10 15:00:59,983 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 21 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:00:59,983 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 15:01:00,017 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 [2024-11-10 15:01:00,019 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 [2024-11-10 15:01:00,112 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 21 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:01:00,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487920040] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 15:01:00,113 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 15:01:00,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 42 [2024-11-10 15:01:00,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264775009] [2024-11-10 15:01:00,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 15:01:00,113 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-11-10 15:01:00,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 15:01:00,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-11-10 15:01:00,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1608, Unknown=0, NotChecked=0, Total=1722 [2024-11-10 15:01:00,114 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand has 42 states, 42 states have (on average 3.2857142857142856) internal successors, (138), 42 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:01:01,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 15:01:01,221 INFO L93 Difference]: Finished difference Result 107 states and 108 transitions. [2024-11-10 15:01:01,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-10 15:01:01,221 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.2857142857142856) internal successors, (138), 42 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2024-11-10 15:01:01,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 15:01:01,222 INFO L225 Difference]: With dead ends: 107 [2024-11-10 15:01:01,222 INFO L226 Difference]: Without dead ends: 76 [2024-11-10 15:01:01,223 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 696 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=315, Invalid=3975, Unknown=0, NotChecked=0, Total=4290 [2024-11-10 15:01:01,223 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 21 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 1340 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 549 SdHoareTripleChecker+Invalid, 1360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-10 15:01:01,223 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 549 Invalid, 1360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1340 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-10 15:01:01,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-11-10 15:01:01,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2024-11-10 15:01:01,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.0273972602739727) internal successors, (75), 73 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) [2024-11-10 15:01:01,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2024-11-10 15:01:01,225 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 69 [2024-11-10 15:01:01,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 15:01:01,225 INFO L471 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2024-11-10 15:01:01,225 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.2857142857142856) internal successors, (138), 42 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:01:01,225 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2024-11-10 15:01:01,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-11-10 15:01:01,225 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 15:01:01,225 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 15:01:01,239 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-11-10 15:01:01,426 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 15:01:01,426 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-10 15:01:01,426 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 15:01:01,427 INFO L85 PathProgramCache]: Analyzing trace with hash -181413907, now seen corresponding path program 12 times [2024-11-10 15:01:01,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 15:01:01,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282116898] [2024-11-10 15:01:01,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:01:01,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 15:01:01,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:01:02,525 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 72 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:01:02,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 15:01:02,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282116898] [2024-11-10 15:01:02,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282116898] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 15:01:02,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743275590] [2024-11-10 15:01:02,526 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-10 15:01:02,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 15:01:02,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 15:01:02,527 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 15:01:02,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-10 15:01:02,864 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2024-11-10 15:01:02,864 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 15:01:02,866 INFO L255 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 91 conjuncts are in the unsatisfiable core [2024-11-10 15:01:02,869 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 15:01:02,906 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 [2024-11-10 15:01:02,914 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 [2024-11-10 15:01:04,802 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 0 proven. 233 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:01:04,802 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 15:01:06,124 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 0 proven. 233 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:01:06,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743275590] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 15:01:06,124 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 15:01:06,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 23] total 64 [2024-11-10 15:01:06,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273675255] [2024-11-10 15:01:06,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 15:01:06,125 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2024-11-10 15:01:06,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 15:01:06,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2024-11-10 15:01:06,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=339, Invalid=3821, Unknown=0, NotChecked=0, Total=4160 [2024-11-10 15:01:06,127 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand has 65 states, 64 states have (on average 3.390625) internal successors, (217), 65 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:01:07,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 15:01:07,965 INFO L93 Difference]: Finished difference Result 87 states and 89 transitions. [2024-11-10 15:01:07,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-10 15:01:07,965 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 64 states have (on average 3.390625) internal successors, (217), 65 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2024-11-10 15:01:07,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 15:01:07,966 INFO L225 Difference]: With dead ends: 87 [2024-11-10 15:01:07,966 INFO L226 Difference]: Without dead ends: 87 [2024-11-10 15:01:07,967 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1623 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=637, Invalid=6503, Unknown=0, NotChecked=0, Total=7140 [2024-11-10 15:01:07,968 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 43 mSDsluCounter, 597 mSDsCounter, 0 mSdLazyCounter, 1771 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 619 SdHoareTripleChecker+Invalid, 1783 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1771 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-10 15:01:07,968 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 619 Invalid, 1783 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1771 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-10 15:01:07,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2024-11-10 15:01:07,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 78. [2024-11-10 15:01:07,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.025974025974026) internal successors, (79), 77 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) [2024-11-10 15:01:07,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2024-11-10 15:01:07,970 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 73 [2024-11-10 15:01:07,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 15:01:07,970 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2024-11-10 15:01:07,970 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 64 states have (on average 3.390625) internal successors, (217), 65 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:01:07,970 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2024-11-10 15:01:07,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-11-10 15:01:07,971 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 15:01:07,971 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 15:01:07,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-11-10 15:01:08,171 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 15:01:08,171 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-10 15:01:08,172 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 15:01:08,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1469994959, now seen corresponding path program 13 times [2024-11-10 15:01:08,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 15:01:08,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310732683] [2024-11-10 15:01:08,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:01:08,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 15:01:08,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:01:09,076 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 106 proven. 158 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:01:09,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 15:01:09,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310732683] [2024-11-10 15:01:09,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310732683] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 15:01:09,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712687921] [2024-11-10 15:01:09,077 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-10 15:01:09,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 15:01:09,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 15:01:09,079 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 15:01:09,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-10 15:01:09,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:01:09,243 INFO L255 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 64 conjuncts are in the unsatisfiable core [2024-11-10 15:01:09,245 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 15:01:09,508 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 [2024-11-10 15:01:09,800 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 24 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:01:09,800 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 15:01:09,840 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 [2024-11-10 15:01:09,842 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 [2024-11-10 15:01:09,944 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 24 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:01:09,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712687921] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 15:01:09,944 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 15:01:09,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 46 [2024-11-10 15:01:09,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264865636] [2024-11-10 15:01:09,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 15:01:09,945 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-11-10 15:01:09,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 15:01:09,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-11-10 15:01:09,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1941, Unknown=0, NotChecked=0, Total=2070 [2024-11-10 15:01:09,946 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand has 46 states, 46 states have (on average 3.347826086956522) internal successors, (154), 46 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) [2024-11-10 15:01:11,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 15:01:11,219 INFO L93 Difference]: Finished difference Result 119 states and 120 transitions. [2024-11-10 15:01:11,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-10 15:01:11,220 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.347826086956522) internal successors, (154), 46 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 77 [2024-11-10 15:01:11,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 15:01:11,220 INFO L225 Difference]: With dead ends: 119 [2024-11-10 15:01:11,220 INFO L226 Difference]: Without dead ends: 84 [2024-11-10 15:01:11,225 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=368, Invalid=4888, Unknown=0, NotChecked=0, Total=5256 [2024-11-10 15:01:11,226 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 21 mSDsluCounter, 677 mSDsCounter, 0 mSdLazyCounter, 1715 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 701 SdHoareTripleChecker+Invalid, 1739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-10 15:01:11,226 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 701 Invalid, 1739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1715 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-10 15:01:11,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2024-11-10 15:01:11,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 82. [2024-11-10 15:01:11,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.0246913580246915) internal successors, (83), 81 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:01:11,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2024-11-10 15:01:11,227 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 77 [2024-11-10 15:01:11,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 15:01:11,228 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2024-11-10 15:01:11,228 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.347826086956522) internal successors, (154), 46 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) [2024-11-10 15:01:11,228 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2024-11-10 15:01:11,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-11-10 15:01:11,230 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 15:01:11,230 INFO L215 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 15:01:11,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-11-10 15:01:11,432 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-11-10 15:01:11,432 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-10 15:01:11,433 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 15:01:11,433 INFO L85 PathProgramCache]: Analyzing trace with hash -380671729, now seen corresponding path program 14 times [2024-11-10 15:01:11,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 15:01:11,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383300915] [2024-11-10 15:01:11,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:01:11,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 15:01:11,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:01:12,252 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 98 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:01:12,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 15:01:12,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383300915] [2024-11-10 15:01:12,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383300915] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 15:01:12,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043970529] [2024-11-10 15:01:12,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-10 15:01:12,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 15:01:12,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 15:01:12,254 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 15:01:12,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-10 15:01:12,400 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-10 15:01:12,401 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 15:01:12,402 INFO L255 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 99 conjuncts are in the unsatisfiable core [2024-11-10 15:01:12,404 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 15:01:12,442 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 [2024-11-10 15:01:12,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-10 15:01:12,451 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-10 15:01:13,700 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 0 proven. 298 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:01:13,700 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 15:01:14,752 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-10 15:01:14,802 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 0 proven. 298 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:01:14,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043970529] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 15:01:14,802 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 15:01:14,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 23] total 66 [2024-11-10 15:01:14,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496252523] [2024-11-10 15:01:14,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 15:01:14,803 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2024-11-10 15:01:14,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 15:01:14,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2024-11-10 15:01:14,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=367, Invalid=4055, Unknown=0, NotChecked=0, Total=4422 [2024-11-10 15:01:14,804 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand has 67 states, 66 states have (on average 3.6515151515151514) internal successors, (241), 67 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:01:16,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 15:01:16,081 INFO L93 Difference]: Finished difference Result 93 states and 95 transitions. [2024-11-10 15:01:16,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-10 15:01:16,081 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 66 states have (on average 3.6515151515151514) internal successors, (241), 67 states have internal predecessors, (241), 0 states have call successors, (0), 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 [2024-11-10 15:01:16,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 15:01:16,082 INFO L225 Difference]: With dead ends: 93 [2024-11-10 15:01:16,082 INFO L226 Difference]: Without dead ends: 93 [2024-11-10 15:01:16,082 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1553 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=516, Invalid=5336, Unknown=0, NotChecked=0, Total=5852 [2024-11-10 15:01:16,083 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 22 mSDsluCounter, 838 mSDsCounter, 0 mSdLazyCounter, 2417 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 862 SdHoareTripleChecker+Invalid, 2430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 2417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-10 15:01:16,083 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 862 Invalid, 2430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 2417 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-10 15:01:16,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2024-11-10 15:01:16,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 86. [2024-11-10 15:01:16,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.0235294117647058) internal successors, (87), 85 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) [2024-11-10 15:01:16,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 87 transitions. [2024-11-10 15:01:16,085 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 87 transitions. Word has length 81 [2024-11-10 15:01:16,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 15:01:16,085 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 87 transitions. [2024-11-10 15:01:16,085 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 66 states have (on average 3.6515151515151514) internal successors, (241), 67 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:01:16,085 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 87 transitions. [2024-11-10 15:01:16,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2024-11-10 15:01:16,086 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 15:01:16,086 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 15:01:16,104 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-11-10 15:01:16,286 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-11-10 15:01:16,287 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-10 15:01:16,287 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 15:01:16,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1915738195, now seen corresponding path program 15 times [2024-11-10 15:01:16,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 15:01:16,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676437478] [2024-11-10 15:01:16,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:01:16,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 15:01:16,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:01:17,239 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 137 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:01:17,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 15:01:17,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676437478] [2024-11-10 15:01:17,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676437478] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 15:01:17,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889205880] [2024-11-10 15:01:17,240 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-10 15:01:17,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 15:01:17,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 15:01:17,241 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 15:01:17,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-10 15:01:17,584 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-11-10 15:01:17,584 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 15:01:17,587 INFO L255 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 98 conjuncts are in the unsatisfiable core [2024-11-10 15:01:17,590 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 15:01:18,003 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-10 15:01:18,478 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 27 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:01:18,479 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 15:01:18,885 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 [2024-11-10 15:01:18,887 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 [2024-11-10 15:01:19,385 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 27 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:01:19,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889205880] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 15:01:19,385 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 15:01:19,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 70 [2024-11-10 15:01:19,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117613079] [2024-11-10 15:01:19,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 15:01:19,386 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2024-11-10 15:01:19,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 15:01:19,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2024-11-10 15:01:19,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=4622, Unknown=0, NotChecked=0, Total=4830 [2024-11-10 15:01:19,387 INFO L87 Difference]: Start difference. First operand 86 states and 87 transitions. Second operand has 70 states, 70 states have (on average 3.442857142857143) internal successors, (241), 70 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:01:21,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 15:01:21,558 INFO L93 Difference]: Finished difference Result 131 states and 132 transitions. [2024-11-10 15:01:21,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-10 15:01:21,558 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 3.442857142857143) internal successors, (241), 70 states have internal predecessors, (241), 0 states have call successors, (0), 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 85 [2024-11-10 15:01:21,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 15:01:21,559 INFO L225 Difference]: With dead ends: 131 [2024-11-10 15:01:21,559 INFO L226 Difference]: Without dead ends: 92 [2024-11-10 15:01:21,560 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1557 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=523, Invalid=9577, Unknown=0, NotChecked=0, Total=10100 [2024-11-10 15:01:21,560 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 23 mSDsluCounter, 1114 mSDsCounter, 0 mSdLazyCounter, 2815 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 1140 SdHoareTripleChecker+Invalid, 2842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 2815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-10 15:01:21,560 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 1140 Invalid, 2842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 2815 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-10 15:01:21,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-11-10 15:01:21,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 90. [2024-11-10 15:01:21,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.0224719101123596) internal successors, (91), 89 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) [2024-11-10 15:01:21,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2024-11-10 15:01:21,562 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 85 [2024-11-10 15:01:21,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 15:01:21,563 INFO L471 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2024-11-10 15:01:21,563 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 3.442857142857143) internal successors, (241), 70 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:01:21,563 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2024-11-10 15:01:21,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2024-11-10 15:01:21,563 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 15:01:21,564 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 15:01:21,580 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-11-10 15:01:21,764 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-11-10 15:01:21,764 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-10 15:01:21,765 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 15:01:21,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1555422001, now seen corresponding path program 16 times [2024-11-10 15:01:21,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 15:01:21,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311548043] [2024-11-10 15:01:21,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:01:21,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 15:01:21,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:01:22,669 INFO L134 CoverageAnalysis]: Checked inductivity of 371 backedges. 128 proven. 243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:01:22,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 15:01:22,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311548043] [2024-11-10 15:01:22,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311548043] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 15:01:22,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212121817] [2024-11-10 15:01:22,669 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-10 15:01:22,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 15:01:22,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 15:01:22,671 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 15:01:22,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-10 15:01:23,057 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-10 15:01:23,057 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 15:01:23,060 INFO L255 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 87 conjuncts are in the unsatisfiable core [2024-11-10 15:01:23,062 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 15:01:23,108 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 [2024-11-10 15:01:23,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-10 15:01:23,112 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-10 15:01:24,613 INFO L134 CoverageAnalysis]: Checked inductivity of 371 backedges. 0 proven. 371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:01:24,613 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 15:01:25,984 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-10 15:01:26,036 INFO L134 CoverageAnalysis]: Checked inductivity of 371 backedges. 0 proven. 371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:01:26,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212121817] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 15:01:26,036 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 15:01:26,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25, 26] total 73 [2024-11-10 15:01:26,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011913232] [2024-11-10 15:01:26,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 15:01:26,037 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2024-11-10 15:01:26,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 15:01:26,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2024-11-10 15:01:26,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=548, Invalid=4854, Unknown=0, NotChecked=0, Total=5402 [2024-11-10 15:01:26,038 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand has 74 states, 73 states have (on average 3.6301369863013697) internal successors, (265), 74 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:01:27,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 15:01:27,249 INFO L93 Difference]: Finished difference Result 101 states and 103 transitions. [2024-11-10 15:01:27,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-11-10 15:01:27,249 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 73 states have (on average 3.6301369863013697) internal successors, (265), 74 states have internal predecessors, (265), 0 states have call successors, (0), 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 89 [2024-11-10 15:01:27,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 15:01:27,250 INFO L225 Difference]: With dead ends: 101 [2024-11-10 15:01:27,250 INFO L226 Difference]: Without dead ends: 101 [2024-11-10 15:01:27,250 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 126 SyntacticMatches, 2 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2152 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=722, Invalid=6418, Unknown=0, NotChecked=0, Total=7140 [2024-11-10 15:01:27,251 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 24 mSDsluCounter, 658 mSDsCounter, 0 mSdLazyCounter, 1962 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 684 SdHoareTripleChecker+Invalid, 1972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1962 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-10 15:01:27,251 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 684 Invalid, 1972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1962 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-10 15:01:27,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2024-11-10 15:01:27,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 94. [2024-11-10 15:01:27,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.021505376344086) internal successors, (95), 93 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:01:27,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 95 transitions. [2024-11-10 15:01:27,253 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 95 transitions. Word has length 89 [2024-11-10 15:01:27,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 15:01:27,253 INFO L471 AbstractCegarLoop]: Abstraction has 94 states and 95 transitions. [2024-11-10 15:01:27,253 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 73 states have (on average 3.6301369863013697) internal successors, (265), 74 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:01:27,254 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 95 transitions. [2024-11-10 15:01:27,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2024-11-10 15:01:27,254 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 15:01:27,254 INFO L215 NwaCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 15:01:27,270 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2024-11-10 15:01:27,454 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-11-10 15:01:27,455 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-10 15:01:27,455 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 15:01:27,455 INFO L85 PathProgramCache]: Analyzing trace with hash 183265653, now seen corresponding path program 17 times [2024-11-10 15:01:27,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 15:01:27,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464149326] [2024-11-10 15:01:27,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:01:27,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 15:01:27,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:01:28,593 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 172 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:01:28,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 15:01:28,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464149326] [2024-11-10 15:01:28,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464149326] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 15:01:28,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018134986] [2024-11-10 15:01:28,593 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-10 15:01:28,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 15:01:28,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 15:01:28,595 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 15:01:28,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-10 15:01:29,074 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2024-11-10 15:01:29,074 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 15:01:29,077 INFO L255 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 76 conjuncts are in the unsatisfiable core [2024-11-10 15:01:29,079 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 15:01:29,403 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 [2024-11-10 15:01:29,822 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 30 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:01:29,822 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 15:01:29,867 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 [2024-11-10 15:01:29,868 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 [2024-11-10 15:01:29,989 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 30 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:01:29,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018134986] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 15:01:29,989 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 15:01:29,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 54 [2024-11-10 15:01:29,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425681326] [2024-11-10 15:01:29,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 15:01:29,990 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2024-11-10 15:01:29,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 15:01:29,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2024-11-10 15:01:29,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=2700, Unknown=0, NotChecked=0, Total=2862 [2024-11-10 15:01:29,991 INFO L87 Difference]: Start difference. First operand 94 states and 95 transitions. Second operand has 54 states, 54 states have (on average 3.4444444444444446) internal successors, (186), 54 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) [2024-11-10 15:01:31,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 15:01:31,805 INFO L93 Difference]: Finished difference Result 143 states and 144 transitions. [2024-11-10 15:01:31,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-11-10 15:01:31,805 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 3.4444444444444446) internal successors, (186), 54 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) Word has length 93 [2024-11-10 15:01:31,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 15:01:31,806 INFO L225 Difference]: With dead ends: 143 [2024-11-10 15:01:31,806 INFO L226 Difference]: Without dead ends: 100 [2024-11-10 15:01:31,806 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1245 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=486, Invalid=6996, Unknown=0, NotChecked=0, Total=7482 [2024-11-10 15:01:31,807 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 25 mSDsluCounter, 912 mSDsCounter, 0 mSdLazyCounter, 2372 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 940 SdHoareTripleChecker+Invalid, 2401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 2372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-10 15:01:31,807 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 940 Invalid, 2401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 2372 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-10 15:01:31,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2024-11-10 15:01:31,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 98. [2024-11-10 15:01:31,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 1.0206185567010309) internal successors, (99), 97 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:01:31,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 99 transitions. [2024-11-10 15:01:31,809 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 99 transitions. Word has length 93 [2024-11-10 15:01:31,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 15:01:31,809 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 99 transitions. [2024-11-10 15:01:31,809 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 3.4444444444444446) internal successors, (186), 54 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) [2024-11-10 15:01:31,809 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 99 transitions. [2024-11-10 15:01:31,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2024-11-10 15:01:31,810 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 15:01:31,810 INFO L215 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 15:01:31,824 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-11-10 15:01:32,010 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-11-10 15:01:32,010 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-10 15:01:32,011 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 15:01:32,011 INFO L85 PathProgramCache]: Analyzing trace with hash 732474963, now seen corresponding path program 18 times [2024-11-10 15:01:32,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 15:01:32,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055459489] [2024-11-10 15:01:32,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:01:32,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 15:01:32,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:01:33,136 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 162 proven. 290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:01:33,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 15:01:33,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055459489] [2024-11-10 15:01:33,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055459489] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 15:01:33,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358919029] [2024-11-10 15:01:33,137 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-10 15:01:33,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 15:01:33,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 15:01:33,138 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 15:01:33,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-10 15:01:34,004 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2024-11-10 15:01:34,004 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 15:01:34,008 INFO L255 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 94 conjuncts are in the unsatisfiable core [2024-11-10 15:01:34,010 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 15:01:34,040 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 [2024-11-10 15:01:34,065 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 [2024-11-10 15:01:35,981 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 0 proven. 452 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:01:35,981 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 15:01:37,836 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 0 proven. 452 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:01:37,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358919029] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 15:01:37,837 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 15:01:37,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 28, 29] total 81 [2024-11-10 15:01:37,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454339874] [2024-11-10 15:01:37,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 15:01:37,837 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2024-11-10 15:01:37,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 15:01:37,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2024-11-10 15:01:37,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=594, Invalid=6048, Unknown=0, NotChecked=0, Total=6642 [2024-11-10 15:01:37,838 INFO L87 Difference]: Start difference. First operand 98 states and 99 transitions. Second operand has 82 states, 81 states have (on average 3.567901234567901) internal successors, (289), 82 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:01:40,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 15:01:40,239 INFO L93 Difference]: Finished difference Result 111 states and 113 transitions. [2024-11-10 15:01:40,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-11-10 15:01:40,239 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 81 states have (on average 3.567901234567901) internal successors, (289), 82 states have internal predecessors, (289), 0 states have call successors, (0), 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 97 [2024-11-10 15:01:40,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 15:01:40,240 INFO L225 Difference]: With dead ends: 111 [2024-11-10 15:01:40,240 INFO L226 Difference]: Without dead ends: 111 [2024-11-10 15:01:40,240 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2430 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1048, Invalid=10508, Unknown=0, NotChecked=0, Total=11556 [2024-11-10 15:01:40,240 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 34 mSDsluCounter, 866 mSDsCounter, 0 mSdLazyCounter, 2601 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 894 SdHoareTripleChecker+Invalid, 2613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 2601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-10 15:01:40,240 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 894 Invalid, 2613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 2601 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-10 15:01:40,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2024-11-10 15:01:40,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 102. [2024-11-10 15:01:40,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.0198019801980198) internal successors, (103), 101 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:01:40,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 103 transitions. [2024-11-10 15:01:40,243 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 103 transitions. Word has length 97 [2024-11-10 15:01:40,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 15:01:40,243 INFO L471 AbstractCegarLoop]: Abstraction has 102 states and 103 transitions. [2024-11-10 15:01:40,244 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 81 states have (on average 3.567901234567901) internal successors, (289), 82 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 15:01:40,244 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 103 transitions. [2024-11-10 15:01:40,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2024-11-10 15:01:40,244 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 15:01:40,244 INFO L215 NwaCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 15:01:40,263 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-11-10 15:01:40,445 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2024-11-10 15:01:40,445 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-11-10 15:01:40,445 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 15:01:40,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1340286057, now seen corresponding path program 19 times [2024-11-10 15:01:40,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 15:01:40,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906603004] [2024-11-10 15:01:40,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:01:40,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 15:01:40,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:01:41,431 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 211 proven. 284 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:01:41,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 15:01:41,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906603004] [2024-11-10 15:01:41,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906603004] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 15:01:41,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401037796] [2024-11-10 15:01:41,432 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-10 15:01:41,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 15:01:41,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 15:01:41,434 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 15:01:41,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-11-10 15:01:41,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:01:41,613 INFO L255 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 82 conjuncts are in the unsatisfiable core [2024-11-10 15:01:41,615 INFO L278 TraceCheckSpWp]: Computing forward predicates...