./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/valid-memsafety.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/substring-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 61a67961 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/substring-alloca-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4cb6276eff0c60579b1d5f7034948eb4f53891709ff48cdd11b3329ec3c4cc2e --- Real Ultimate output --- This is Ultimate 0.2.5-wip.fs.cvc5-61a6796-m [2024-10-14 17:46:31,160 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-14 17:46:31,211 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-14 17:46:31,217 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-14 17:46:31,218 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-14 17:46:31,240 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-14 17:46:31,241 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-14 17:46:31,241 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-14 17:46:31,242 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-14 17:46:31,245 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-14 17:46:31,245 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-14 17:46:31,245 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-14 17:46:31,246 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-14 17:46:31,246 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-14 17:46:31,246 INFO L153 SettingsManager]: * Use SBE=true [2024-10-14 17:46:31,246 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-14 17:46:31,247 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-14 17:46:31,247 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-14 17:46:31,247 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-14 17:46:31,247 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-14 17:46:31,247 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-14 17:46:31,249 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-14 17:46:31,249 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-14 17:46:31,249 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-14 17:46:31,249 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-14 17:46:31,250 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-14 17:46:31,250 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-14 17:46:31,250 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-14 17:46:31,250 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-14 17:46:31,250 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-14 17:46:31,251 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-14 17:46:31,251 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-14 17:46:31,251 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-14 17:46:31,251 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 17:46:31,252 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-14 17:46:31,252 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-14 17:46:31,252 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-14 17:46:31,252 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-14 17:46:31,253 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-14 17:46:31,253 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-14 17:46:31,253 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-14 17:46:31,254 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-14 17:46:31,254 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4cb6276eff0c60579b1d5f7034948eb4f53891709ff48cdd11b3329ec3c4cc2e [2024-10-14 17:46:31,501 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-14 17:46:31,521 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-14 17:46:31,523 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-14 17:46:31,524 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-14 17:46:31,525 INFO L274 PluginConnector]: CDTParser initialized [2024-10-14 17:46:31,525 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/substring-alloca-2.i [2024-10-14 17:46:32,730 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-14 17:46:32,919 INFO L384 CDTParser]: Found 1 translation units. [2024-10-14 17:46:32,920 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/substring-alloca-2.i [2024-10-14 17:46:32,929 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/20eeff52c/bd58a65dc8424a3c9e53a8fd25262d8c/FLAGadbdc27ed [2024-10-14 17:46:32,940 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/20eeff52c/bd58a65dc8424a3c9e53a8fd25262d8c [2024-10-14 17:46:32,943 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-14 17:46:32,944 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-14 17:46:32,946 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-14 17:46:32,947 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-14 17:46:32,951 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-14 17:46:32,951 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:46:32" (1/1) ... [2024-10-14 17:46:32,953 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68c91695 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:46:32, skipping insertion in model container [2024-10-14 17:46:32,953 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:46:32" (1/1) ... [2024-10-14 17:46:32,985 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-14 17:46:33,235 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 17:46:33,244 INFO L200 MainTranslator]: Completed pre-run [2024-10-14 17:46:33,276 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 17:46:33,303 INFO L204 MainTranslator]: Completed translation [2024-10-14 17:46:33,303 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:46:33 WrapperNode [2024-10-14 17:46:33,303 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-14 17:46:33,304 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-14 17:46:33,304 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-14 17:46:33,305 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-14 17:46:33,310 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:46:33" (1/1) ... [2024-10-14 17:46:33,320 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:46:33" (1/1) ... [2024-10-14 17:46:33,336 INFO L138 Inliner]: procedures = 117, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 110 [2024-10-14 17:46:33,336 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-14 17:46:33,337 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-14 17:46:33,337 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-14 17:46:33,337 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-14 17:46:33,348 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:46:33" (1/1) ... [2024-10-14 17:46:33,348 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:46:33" (1/1) ... [2024-10-14 17:46:33,350 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:46:33" (1/1) ... [2024-10-14 17:46:33,360 INFO L175 MemorySlicer]: Split 9 memory accesses to 2 slices as follows [5, 4]. 56 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0, 0]. The 4 writes are split as follows [2, 2]. [2024-10-14 17:46:33,360 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:46:33" (1/1) ... [2024-10-14 17:46:33,360 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:46:33" (1/1) ... [2024-10-14 17:46:33,364 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:46:33" (1/1) ... [2024-10-14 17:46:33,366 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:46:33" (1/1) ... [2024-10-14 17:46:33,367 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:46:33" (1/1) ... [2024-10-14 17:46:33,368 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:46:33" (1/1) ... [2024-10-14 17:46:33,370 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-14 17:46:33,371 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-14 17:46:33,371 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-14 17:46:33,371 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-14 17:46:33,371 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:46:33" (1/1) ... [2024-10-14 17:46:33,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 17:46:33,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:46:33,403 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-14 17:46:33,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-14 17:46:33,446 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-14 17:46:33,446 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-14 17:46:33,446 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-14 17:46:33,446 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-14 17:46:33,446 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-14 17:46:33,447 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-14 17:46:33,447 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-14 17:46:33,447 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-14 17:46:33,584 INFO L238 CfgBuilder]: Building ICFG [2024-10-14 17:46:33,585 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-14 17:46:33,798 INFO L? ?]: Removed 60 outVars from TransFormulas that were not future-live. [2024-10-14 17:46:33,799 INFO L287 CfgBuilder]: Performing block encoding [2024-10-14 17:46:33,837 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-14 17:46:33,839 INFO L314 CfgBuilder]: Removed 4 assume(true) statements. [2024-10-14 17:46:33,839 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:46:33 BoogieIcfgContainer [2024-10-14 17:46:33,839 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-14 17:46:33,841 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-14 17:46:33,841 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-14 17:46:33,844 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-14 17:46:33,845 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 05:46:32" (1/3) ... [2024-10-14 17:46:33,845 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fa649a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:46:33, skipping insertion in model container [2024-10-14 17:46:33,846 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:46:33" (2/3) ... [2024-10-14 17:46:33,846 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fa649a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:46:33, skipping insertion in model container [2024-10-14 17:46:33,846 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:46:33" (3/3) ... [2024-10-14 17:46:33,847 INFO L112 eAbstractionObserver]: Analyzing ICFG substring-alloca-2.i [2024-10-14 17:46:33,862 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-14 17:46:33,862 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 19 error locations. [2024-10-14 17:46:33,895 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-14 17:46:33,900 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;@31ba4197, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-14 17:46:33,900 INFO L334 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2024-10-14 17:46:33,903 INFO L276 IsEmpty]: Start isEmpty. Operand has 44 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 43 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:33,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-10-14 17:46:33,910 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:46:33,911 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-14 17:46:33,911 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-14 17:46:33,915 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:46:33,915 INFO L85 PathProgramCache]: Analyzing trace with hash 118882417, now seen corresponding path program 1 times [2024-10-14 17:46:33,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:46:33,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411397653] [2024-10-14 17:46:33,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:46:33,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:46:34,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:46:34,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:46:34,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:46:34,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411397653] [2024-10-14 17:46:34,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411397653] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:46:34,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 17:46:34,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-14 17:46:34,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033319489] [2024-10-14 17:46:34,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:46:34,129 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 17:46:34,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:46:34,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 17:46:34,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-14 17:46:34,153 INFO L87 Difference]: Start difference. First operand has 44 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 43 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) Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:34,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:46:34,209 INFO L93 Difference]: Finished difference Result 55 states and 65 transitions. [2024-10-14 17:46:34,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 17:46:34,213 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-10-14 17:46:34,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:46:34,218 INFO L225 Difference]: With dead ends: 55 [2024-10-14 17:46:34,219 INFO L226 Difference]: Without dead ends: 54 [2024-10-14 17:46:34,220 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-14 17:46:34,223 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 10 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 17:46:34,224 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 85 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 17:46:34,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-10-14 17:46:34,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2024-10-14 17:46:34,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 27 states have (on average 2.0) internal successors, (54), 45 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:34,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2024-10-14 17:46:34,249 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 6 [2024-10-14 17:46:34,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:46:34,250 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2024-10-14 17:46:34,250 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:34,250 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2024-10-14 17:46:34,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-10-14 17:46:34,250 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:46:34,250 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-14 17:46:34,250 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-14 17:46:34,251 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-14 17:46:34,251 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:46:34,251 INFO L85 PathProgramCache]: Analyzing trace with hash 120729459, now seen corresponding path program 1 times [2024-10-14 17:46:34,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:46:34,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936099480] [2024-10-14 17:46:34,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:46:34,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:46:34,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:46:34,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:46:34,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:46:34,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936099480] [2024-10-14 17:46:34,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936099480] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:46:34,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 17:46:34,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 17:46:34,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762248455] [2024-10-14 17:46:34,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:46:34,396 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 17:46:34,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:46:34,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 17:46:34,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 17:46:34,397 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:34,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:46:34,441 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2024-10-14 17:46:34,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 17:46:34,441 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-10-14 17:46:34,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:46:34,442 INFO L225 Difference]: With dead ends: 44 [2024-10-14 17:46:34,442 INFO L226 Difference]: Without dead ends: 44 [2024-10-14 17:46:34,443 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 17:46:34,444 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 12 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 17:46:34,445 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 55 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 17:46:34,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-10-14 17:46:34,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2024-10-14 17:46:34,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 43 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) [2024-10-14 17:46:34,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2024-10-14 17:46:34,452 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 6 [2024-10-14 17:46:34,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:46:34,453 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2024-10-14 17:46:34,453 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:34,453 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2024-10-14 17:46:34,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-10-14 17:46:34,454 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:46:34,454 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-14 17:46:34,454 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-14 17:46:34,455 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-14 17:46:34,455 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:46:34,455 INFO L85 PathProgramCache]: Analyzing trace with hash 120729460, now seen corresponding path program 1 times [2024-10-14 17:46:34,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:46:34,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548190653] [2024-10-14 17:46:34,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:46:34,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:46:34,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:46:34,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:46:34,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:46:34,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548190653] [2024-10-14 17:46:34,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548190653] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:46:34,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 17:46:34,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-14 17:46:34,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619904041] [2024-10-14 17:46:34,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:46:34,685 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-14 17:46:34,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:46:34,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-14 17:46:34,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-14 17:46:34,686 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:34,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:46:34,772 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2024-10-14 17:46:34,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 17:46:34,772 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-10-14 17:46:34,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:46:34,773 INFO L225 Difference]: With dead ends: 46 [2024-10-14 17:46:34,777 INFO L226 Difference]: Without dead ends: 46 [2024-10-14 17:46:34,778 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-10-14 17:46:34,778 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 16 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 17:46:34,779 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 90 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 17:46:34,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-10-14 17:46:34,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2024-10-14 17:46:34,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 29 states have (on average 1.896551724137931) internal successors, (55), 45 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:34,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2024-10-14 17:46:34,782 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 6 [2024-10-14 17:46:34,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:46:34,783 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2024-10-14 17:46:34,783 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:34,783 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2024-10-14 17:46:34,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-10-14 17:46:34,783 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:46:34,783 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:46:34,784 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-14 17:46:34,784 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-14 17:46:34,784 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:46:34,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1718164835, now seen corresponding path program 1 times [2024-10-14 17:46:34,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:46:34,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947129313] [2024-10-14 17:46:34,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:46:34,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:46:34,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:46:34,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:46:34,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:46:34,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947129313] [2024-10-14 17:46:34,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947129313] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:46:34,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 17:46:34,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-14 17:46:34,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58609619] [2024-10-14 17:46:34,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:46:34,880 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 17:46:34,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:46:34,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 17:46:34,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-14 17:46:34,881 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand has 4 states, 4 states have (on average 2.0) 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) [2024-10-14 17:46:34,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:46:34,924 INFO L93 Difference]: Finished difference Result 61 states and 73 transitions. [2024-10-14 17:46:34,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 17:46:34,925 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) 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 [2024-10-14 17:46:34,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:46:34,926 INFO L225 Difference]: With dead ends: 61 [2024-10-14 17:46:34,927 INFO L226 Difference]: Without dead ends: 61 [2024-10-14 17:46:34,927 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-14 17:46:34,928 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 8 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 17:46:34,930 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 81 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 17:46:34,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-10-14 17:46:34,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 55. [2024-10-14 17:46:34,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 38 states have (on average 1.763157894736842) internal successors, (67), 54 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) [2024-10-14 17:46:34,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 67 transitions. [2024-10-14 17:46:34,941 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 67 transitions. Word has length 8 [2024-10-14 17:46:34,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:46:34,941 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 67 transitions. [2024-10-14 17:46:34,941 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) 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) [2024-10-14 17:46:34,942 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 67 transitions. [2024-10-14 17:46:34,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-10-14 17:46:34,942 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:46:34,942 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:46:34,945 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-14 17:46:34,946 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-14 17:46:34,946 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:46:34,946 INFO L85 PathProgramCache]: Analyzing trace with hash -1660906533, now seen corresponding path program 1 times [2024-10-14 17:46:34,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:46:34,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075141559] [2024-10-14 17:46:34,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:46:34,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:46:34,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:46:34,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:46:34,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:46:34,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075141559] [2024-10-14 17:46:34,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075141559] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:46:34,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 17:46:34,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 17:46:34,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518743424] [2024-10-14 17:46:34,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:46:34,992 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 17:46:34,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:46:34,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 17:46:34,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 17:46:34,993 INFO L87 Difference]: Start difference. First operand 55 states and 67 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:35,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:46:35,025 INFO L93 Difference]: Finished difference Result 53 states and 65 transitions. [2024-10-14 17:46:35,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 17:46:35,026 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-10-14 17:46:35,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:46:35,026 INFO L225 Difference]: With dead ends: 53 [2024-10-14 17:46:35,026 INFO L226 Difference]: Without dead ends: 53 [2024-10-14 17:46:35,027 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 17:46:35,027 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 8 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 17:46:35,028 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 55 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 17:46:35,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-10-14 17:46:35,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2024-10-14 17:46:35,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 38 states have (on average 1.7105263157894737) internal successors, (65), 52 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:35,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 65 transitions. [2024-10-14 17:46:35,035 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 65 transitions. Word has length 8 [2024-10-14 17:46:35,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:46:35,035 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 65 transitions. [2024-10-14 17:46:35,035 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:35,035 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 65 transitions. [2024-10-14 17:46:35,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-10-14 17:46:35,036 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:46:35,036 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:46:35,036 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-14 17:46:35,036 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-14 17:46:35,036 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:46:35,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1660906532, now seen corresponding path program 1 times [2024-10-14 17:46:35,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:46:35,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603527543] [2024-10-14 17:46:35,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:46:35,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:46:35,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:46:35,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:46:35,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:46:35,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603527543] [2024-10-14 17:46:35,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603527543] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:46:35,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 17:46:35,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-14 17:46:35,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379175616] [2024-10-14 17:46:35,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:46:35,138 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-14 17:46:35,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:46:35,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-14 17:46:35,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-10-14 17:46:35,139 INFO L87 Difference]: Start difference. First operand 53 states and 65 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:35,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:46:35,219 INFO L93 Difference]: Finished difference Result 55 states and 68 transitions. [2024-10-14 17:46:35,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-14 17:46:35,220 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-10-14 17:46:35,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:46:35,220 INFO L225 Difference]: With dead ends: 55 [2024-10-14 17:46:35,220 INFO L226 Difference]: Without dead ends: 55 [2024-10-14 17:46:35,220 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-10-14 17:46:35,221 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 15 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 17:46:35,221 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 94 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 17:46:35,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-10-14 17:46:35,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2024-10-14 17:46:35,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 40 states have (on average 1.7) internal successors, (68), 54 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:35,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2024-10-14 17:46:35,230 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 8 [2024-10-14 17:46:35,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:46:35,230 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2024-10-14 17:46:35,230 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:35,230 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2024-10-14 17:46:35,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-10-14 17:46:35,231 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:46:35,231 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-10-14 17:46:35,231 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-14 17:46:35,232 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-14 17:46:35,232 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:46:35,232 INFO L85 PathProgramCache]: Analyzing trace with hash 56987063, now seen corresponding path program 1 times [2024-10-14 17:46:35,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:46:35,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409756057] [2024-10-14 17:46:35,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:46:35,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:46:35,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:46:35,369 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:46:35,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:46:35,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409756057] [2024-10-14 17:46:35,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409756057] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:46:35,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297081890] [2024-10-14 17:46:35,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:46:35,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:46:35,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:46:35,376 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 17:46:35,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-14 17:46:35,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:46:35,426 INFO L255 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-10-14 17:46:35,433 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:46:35,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-14 17:46:35,505 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2024-10-14 17:46:35,514 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-10-14 17:46:35,636 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:46:35,636 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:46:35,748 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-14 17:46:35,779 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:46:35,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297081890] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:46:35,780 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:46:35,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2024-10-14 17:46:35,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736176602] [2024-10-14 17:46:35,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:46:35,781 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-14 17:46:35,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:46:35,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-14 17:46:35,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2024-10-14 17:46:35,782 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:35,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:46:35,933 INFO L93 Difference]: Finished difference Result 56 states and 70 transitions. [2024-10-14 17:46:35,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-14 17:46:35,934 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-10-14 17:46:35,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:46:35,935 INFO L225 Difference]: With dead ends: 56 [2024-10-14 17:46:35,935 INFO L226 Difference]: Without dead ends: 56 [2024-10-14 17:46:35,937 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2024-10-14 17:46:35,938 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 19 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 17:46:35,938 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 160 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 17:46:35,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-10-14 17:46:35,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 50. [2024-10-14 17:46:35,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 36 states have (on average 1.6666666666666667) internal successors, (60), 49 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:35,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2024-10-14 17:46:35,944 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 8 [2024-10-14 17:46:35,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:46:35,944 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2024-10-14 17:46:35,945 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:35,945 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2024-10-14 17:46:35,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-10-14 17:46:35,946 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:46:35,946 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:46:35,960 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-14 17:46:36,150 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:46:36,151 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-14 17:46:36,151 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:46:36,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1723503953, now seen corresponding path program 1 times [2024-10-14 17:46:36,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:46:36,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16865965] [2024-10-14 17:46:36,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:46:36,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:46:36,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:46:36,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:46:36,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:46:36,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16865965] [2024-10-14 17:46:36,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16865965] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:46:36,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 17:46:36,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-14 17:46:36,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408686482] [2024-10-14 17:46:36,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:46:36,242 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 17:46:36,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:46:36,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 17:46:36,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-14 17:46:36,243 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:36,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:46:36,290 INFO L93 Difference]: Finished difference Result 60 states and 72 transitions. [2024-10-14 17:46:36,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 17:46:36,293 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-10-14 17:46:36,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:46:36,293 INFO L225 Difference]: With dead ends: 60 [2024-10-14 17:46:36,293 INFO L226 Difference]: Without dead ends: 60 [2024-10-14 17:46:36,294 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-14 17:46:36,295 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 4 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 17:46:36,295 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 89 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 17:46:36,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-10-14 17:46:36,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2024-10-14 17:46:36,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 45 states have (on average 1.6) internal successors, (72), 58 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:36,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 72 transitions. [2024-10-14 17:46:36,302 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 72 transitions. Word has length 9 [2024-10-14 17:46:36,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:46:36,302 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 72 transitions. [2024-10-14 17:46:36,302 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:36,302 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 72 transitions. [2024-10-14 17:46:36,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-10-14 17:46:36,303 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:46:36,303 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:46:36,303 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-14 17:46:36,303 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-14 17:46:36,303 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:46:36,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1762116717, now seen corresponding path program 1 times [2024-10-14 17:46:36,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:46:36,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049952356] [2024-10-14 17:46:36,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:46:36,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:46:36,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:46:36,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:46:36,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:46:36,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049952356] [2024-10-14 17:46:36,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049952356] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:46:36,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 17:46:36,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-14 17:46:36,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825667324] [2024-10-14 17:46:36,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:46:36,442 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-14 17:46:36,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:46:36,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-14 17:46:36,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-10-14 17:46:36,443 INFO L87 Difference]: Start difference. First operand 59 states and 72 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:36,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:46:36,484 INFO L93 Difference]: Finished difference Result 73 states and 90 transitions. [2024-10-14 17:46:36,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 17:46:36,484 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-10-14 17:46:36,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:46:36,485 INFO L225 Difference]: With dead ends: 73 [2024-10-14 17:46:36,485 INFO L226 Difference]: Without dead ends: 73 [2024-10-14 17:46:36,485 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-10-14 17:46:36,486 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 16 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 85 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 [2024-10-14 17:46:36,486 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 85 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 17:46:36,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-10-14 17:46:36,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 61. [2024-10-14 17:46:36,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 60 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:36,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 76 transitions. [2024-10-14 17:46:36,488 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 76 transitions. Word has length 9 [2024-10-14 17:46:36,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:46:36,488 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 76 transitions. [2024-10-14 17:46:36,488 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:36,489 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 76 transitions. [2024-10-14 17:46:36,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-10-14 17:46:36,489 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:46:36,489 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:46:36,489 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-14 17:46:36,489 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-14 17:46:36,489 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:46:36,489 INFO L85 PathProgramCache]: Analyzing trace with hash -1889014996, now seen corresponding path program 1 times [2024-10-14 17:46:36,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:46:36,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539650523] [2024-10-14 17:46:36,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:46:36,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:46:36,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:46:36,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:46:36,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:46:36,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539650523] [2024-10-14 17:46:36,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539650523] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:46:36,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 17:46:36,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-14 17:46:36,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379528994] [2024-10-14 17:46:36,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:46:36,554 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 17:46:36,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:46:36,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 17:46:36,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-14 17:46:36,555 INFO L87 Difference]: Start difference. First operand 61 states and 76 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:36,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:46:36,590 INFO L93 Difference]: Finished difference Result 67 states and 82 transitions. [2024-10-14 17:46:36,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 17:46:36,591 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-10-14 17:46:36,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:46:36,591 INFO L225 Difference]: With dead ends: 67 [2024-10-14 17:46:36,591 INFO L226 Difference]: Without dead ends: 67 [2024-10-14 17:46:36,591 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-14 17:46:36,592 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 3 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 17:46:36,592 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 90 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 17:46:36,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-10-14 17:46:36,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2024-10-14 17:46:36,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 52 states have (on average 1.5769230769230769) internal successors, (82), 65 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:36,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 82 transitions. [2024-10-14 17:46:36,595 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 82 transitions. Word has length 10 [2024-10-14 17:46:36,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:46:36,595 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 82 transitions. [2024-10-14 17:46:36,595 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:36,595 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 82 transitions. [2024-10-14 17:46:36,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-10-14 17:46:36,596 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:46:36,596 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:46:36,596 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-10-14 17:46:36,596 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-14 17:46:36,596 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:46:36,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1596605674, now seen corresponding path program 1 times [2024-10-14 17:46:36,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:46:36,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872671962] [2024-10-14 17:46:36,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:46:36,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:46:36,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:46:36,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:46:36,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:46:36,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872671962] [2024-10-14 17:46:36,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872671962] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:46:36,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 17:46:36,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-14 17:46:36,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019830172] [2024-10-14 17:46:36,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:46:36,718 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-14 17:46:36,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:46:36,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-14 17:46:36,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-10-14 17:46:36,719 INFO L87 Difference]: Start difference. First operand 66 states and 82 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:36,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:46:36,751 INFO L93 Difference]: Finished difference Result 72 states and 88 transitions. [2024-10-14 17:46:36,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-14 17:46:36,751 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-10-14 17:46:36,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:46:36,752 INFO L225 Difference]: With dead ends: 72 [2024-10-14 17:46:36,752 INFO L226 Difference]: Without dead ends: 72 [2024-10-14 17:46:36,752 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-10-14 17:46:36,752 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 24 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 17:46:36,753 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 61 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 17:46:36,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-10-14 17:46:36,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 66. [2024-10-14 17:46:36,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 52 states have (on average 1.5769230769230769) internal successors, (82), 65 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:36,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 82 transitions. [2024-10-14 17:46:36,759 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 82 transitions. Word has length 10 [2024-10-14 17:46:36,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:46:36,759 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 82 transitions. [2024-10-14 17:46:36,759 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:36,759 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 82 transitions. [2024-10-14 17:46:36,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-10-14 17:46:36,759 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:46:36,760 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:46:36,760 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-10-14 17:46:36,760 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-14 17:46:36,760 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:46:36,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1596731211, now seen corresponding path program 1 times [2024-10-14 17:46:36,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:46:36,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682567320] [2024-10-14 17:46:36,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:46:36,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:46:36,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:46:36,877 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:46:36,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:46:36,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682567320] [2024-10-14 17:46:36,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682567320] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:46:36,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916053036] [2024-10-14 17:46:36,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:46:36,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:46:36,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:46:36,880 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 17:46:36,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-14 17:46:36,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:46:36,933 INFO L255 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-14 17:46:36,935 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:46:36,951 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-10-14 17:46:36,958 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 [2024-10-14 17:46:37,068 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:46:37,068 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:46:37,194 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:46:37,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916053036] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:46:37,194 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:46:37,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2024-10-14 17:46:37,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239890307] [2024-10-14 17:46:37,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:46:37,195 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-14 17:46:37,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:46:37,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-14 17:46:37,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2024-10-14 17:46:37,196 INFO L87 Difference]: Start difference. First operand 66 states and 82 transitions. Second operand has 16 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:37,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:46:37,362 INFO L93 Difference]: Finished difference Result 67 states and 84 transitions. [2024-10-14 17:46:37,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-14 17:46:37,362 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-10-14 17:46:37,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:46:37,363 INFO L225 Difference]: With dead ends: 67 [2024-10-14 17:46:37,363 INFO L226 Difference]: Without dead ends: 67 [2024-10-14 17:46:37,363 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2024-10-14 17:46:37,363 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 11 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 17:46:37,364 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 168 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 17:46:37,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-10-14 17:46:37,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 63. [2024-10-14 17:46:37,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 50 states have (on average 1.56) internal successors, (78), 62 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:37,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 78 transitions. [2024-10-14 17:46:37,365 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 78 transitions. Word has length 10 [2024-10-14 17:46:37,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:46:37,366 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 78 transitions. [2024-10-14 17:46:37,366 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:37,366 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 78 transitions. [2024-10-14 17:46:37,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-10-14 17:46:37,366 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:46:37,366 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:46:37,379 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-14 17:46:37,567 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,SelfDestructingSolverStorable11 [2024-10-14 17:46:37,568 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-14 17:46:37,568 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:46:37,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1570079409, now seen corresponding path program 1 times [2024-10-14 17:46:37,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:46:37,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13650397] [2024-10-14 17:46:37,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:46:37,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:46:37,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:46:37,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:46:37,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:46:37,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13650397] [2024-10-14 17:46:37,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13650397] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:46:37,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 17:46:37,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-14 17:46:37,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232050868] [2024-10-14 17:46:37,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:46:37,592 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 17:46:37,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:46:37,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 17:46:37,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 17:46:37,592 INFO L87 Difference]: Start difference. First operand 63 states and 78 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:37,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:46:37,621 INFO L93 Difference]: Finished difference Result 62 states and 77 transitions. [2024-10-14 17:46:37,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 17:46:37,621 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-10-14 17:46:37,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:46:37,622 INFO L225 Difference]: With dead ends: 62 [2024-10-14 17:46:37,622 INFO L226 Difference]: Without dead ends: 62 [2024-10-14 17:46:37,622 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 17:46:37,623 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 30 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 17:46:37,623 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 50 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 17:46:37,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-10-14 17:46:37,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2024-10-14 17:46:37,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 50 states have (on average 1.54) internal successors, (77), 61 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:37,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 77 transitions. [2024-10-14 17:46:37,625 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 77 transitions. Word has length 11 [2024-10-14 17:46:37,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:46:37,625 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 77 transitions. [2024-10-14 17:46:37,625 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:37,625 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 77 transitions. [2024-10-14 17:46:37,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-10-14 17:46:37,626 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:46:37,626 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:46:37,626 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-10-14 17:46:37,626 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-14 17:46:37,626 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:46:37,626 INFO L85 PathProgramCache]: Analyzing trace with hash 1570079410, now seen corresponding path program 1 times [2024-10-14 17:46:37,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:46:37,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439273169] [2024-10-14 17:46:37,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:46:37,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:46:37,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:46:37,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:46:37,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:46:37,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439273169] [2024-10-14 17:46:37,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439273169] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:46:37,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 17:46:37,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-14 17:46:37,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918939798] [2024-10-14 17:46:37,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:46:37,683 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-14 17:46:37,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:46:37,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-14 17:46:37,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-10-14 17:46:37,683 INFO L87 Difference]: Start difference. First operand 62 states and 77 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:37,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:46:37,752 INFO L93 Difference]: Finished difference Result 83 states and 102 transitions. [2024-10-14 17:46:37,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-14 17:46:37,753 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-10-14 17:46:37,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:46:37,753 INFO L225 Difference]: With dead ends: 83 [2024-10-14 17:46:37,753 INFO L226 Difference]: Without dead ends: 83 [2024-10-14 17:46:37,753 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-10-14 17:46:37,754 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 34 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 17:46:37,754 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 101 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 17:46:37,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2024-10-14 17:46:37,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 63. [2024-10-14 17:46:37,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 51 states have (on average 1.5294117647058822) internal successors, (78), 62 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:37,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 78 transitions. [2024-10-14 17:46:37,756 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 78 transitions. Word has length 11 [2024-10-14 17:46:37,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:46:37,756 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 78 transitions. [2024-10-14 17:46:37,756 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:37,756 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 78 transitions. [2024-10-14 17:46:37,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-10-14 17:46:37,757 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:46:37,757 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:46:37,757 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-10-14 17:46:37,757 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-14 17:46:37,757 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:46:37,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1187912522, now seen corresponding path program 1 times [2024-10-14 17:46:37,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:46:37,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704624154] [2024-10-14 17:46:37,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:46:37,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:46:37,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:46:37,883 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:46:37,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:46:37,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704624154] [2024-10-14 17:46:37,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704624154] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:46:37,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 17:46:37,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-14 17:46:37,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256740706] [2024-10-14 17:46:37,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:46:37,884 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-14 17:46:37,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:46:37,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-14 17:46:37,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-10-14 17:46:37,885 INFO L87 Difference]: Start difference. First operand 63 states and 78 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:37,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:46:37,923 INFO L93 Difference]: Finished difference Result 62 states and 76 transitions. [2024-10-14 17:46:37,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 17:46:37,924 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-10-14 17:46:37,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:46:37,924 INFO L225 Difference]: With dead ends: 62 [2024-10-14 17:46:37,924 INFO L226 Difference]: Without dead ends: 62 [2024-10-14 17:46:37,924 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-10-14 17:46:37,924 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 6 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 17:46:37,925 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 90 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 17:46:37,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-10-14 17:46:37,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 50. [2024-10-14 17:46:37,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 39 states have (on average 1.5384615384615385) internal successors, (60), 49 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:37,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2024-10-14 17:46:37,926 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 11 [2024-10-14 17:46:37,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:46:37,926 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2024-10-14 17:46:37,926 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:37,926 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2024-10-14 17:46:37,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-10-14 17:46:37,927 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:46:37,927 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:46:37,927 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-10-14 17:46:37,927 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-14 17:46:37,927 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:46:37,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1155317913, now seen corresponding path program 1 times [2024-10-14 17:46:37,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:46:37,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032031789] [2024-10-14 17:46:37,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:46:37,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:46:37,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:46:38,051 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:46:38,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:46:38,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032031789] [2024-10-14 17:46:38,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032031789] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:46:38,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 17:46:38,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-14 17:46:38,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482213364] [2024-10-14 17:46:38,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:46:38,052 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-14 17:46:38,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:46:38,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-14 17:46:38,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-10-14 17:46:38,053 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:38,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:46:38,083 INFO L93 Difference]: Finished difference Result 49 states and 59 transitions. [2024-10-14 17:46:38,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-14 17:46:38,083 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-10-14 17:46:38,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:46:38,084 INFO L225 Difference]: With dead ends: 49 [2024-10-14 17:46:38,084 INFO L226 Difference]: Without dead ends: 49 [2024-10-14 17:46:38,084 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-10-14 17:46:38,084 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 3 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 17:46:38,084 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 78 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 17:46:38,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-10-14 17:46:38,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2024-10-14 17:46:38,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 35 states have (on average 1.542857142857143) internal successors, (54), 44 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:38,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 54 transitions. [2024-10-14 17:46:38,088 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 54 transitions. Word has length 12 [2024-10-14 17:46:38,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:46:38,088 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 54 transitions. [2024-10-14 17:46:38,088 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:38,088 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 54 transitions. [2024-10-14 17:46:38,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-10-14 17:46:38,088 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:46:38,088 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:46:38,088 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-10-14 17:46:38,089 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-14 17:46:38,089 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:46:38,089 INFO L85 PathProgramCache]: Analyzing trace with hash 1312792438, now seen corresponding path program 1 times [2024-10-14 17:46:38,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:46:38,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259156037] [2024-10-14 17:46:38,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:46:38,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:46:38,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:46:38,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:46:38,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:46:38,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259156037] [2024-10-14 17:46:38,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259156037] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:46:38,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 17:46:38,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-14 17:46:38,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266418462] [2024-10-14 17:46:38,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:46:38,128 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 17:46:38,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:46:38,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 17:46:38,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 17:46:38,129 INFO L87 Difference]: Start difference. First operand 45 states and 54 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:38,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:46:38,163 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2024-10-14 17:46:38,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 17:46:38,164 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-10-14 17:46:38,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:46:38,164 INFO L225 Difference]: With dead ends: 42 [2024-10-14 17:46:38,164 INFO L226 Difference]: Without dead ends: 42 [2024-10-14 17:46:38,164 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-14 17:46:38,165 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 27 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 17:46:38,165 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 46 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 17:46:38,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-10-14 17:46:38,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2024-10-14 17:46:38,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 35 states have (on average 1.457142857142857) internal successors, (51), 41 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) [2024-10-14 17:46:38,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 51 transitions. [2024-10-14 17:46:38,166 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 51 transitions. Word has length 13 [2024-10-14 17:46:38,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:46:38,166 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 51 transitions. [2024-10-14 17:46:38,167 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:38,167 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 51 transitions. [2024-10-14 17:46:38,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-10-14 17:46:38,167 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:46:38,167 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:46:38,167 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-10-14 17:46:38,167 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-14 17:46:38,168 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:46:38,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1312792439, now seen corresponding path program 1 times [2024-10-14 17:46:38,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:46:38,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269056865] [2024-10-14 17:46:38,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:46:38,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:46:38,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:46:38,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:46:38,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:46:38,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269056865] [2024-10-14 17:46:38,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269056865] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:46:38,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 17:46:38,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-14 17:46:38,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244411084] [2024-10-14 17:46:38,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:46:38,242 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-14 17:46:38,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:46:38,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-14 17:46:38,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-10-14 17:46:38,243 INFO L87 Difference]: Start difference. First operand 42 states and 51 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:38,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:46:38,294 INFO L93 Difference]: Finished difference Result 50 states and 61 transitions. [2024-10-14 17:46:38,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-14 17:46:38,294 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-10-14 17:46:38,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:46:38,295 INFO L225 Difference]: With dead ends: 50 [2024-10-14 17:46:38,295 INFO L226 Difference]: Without dead ends: 50 [2024-10-14 17:46:38,295 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-10-14 17:46:38,295 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 45 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 17:46:38,295 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 56 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 17:46:38,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-10-14 17:46:38,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2024-10-14 17:46:38,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 41 states have (on average 1.4878048780487805) internal successors, (61), 47 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:38,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 61 transitions. [2024-10-14 17:46:38,297 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 61 transitions. Word has length 13 [2024-10-14 17:46:38,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:46:38,297 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 61 transitions. [2024-10-14 17:46:38,297 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:38,297 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 61 transitions. [2024-10-14 17:46:38,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-10-14 17:46:38,297 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:46:38,297 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:46:38,297 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-10-14 17:46:38,298 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-14 17:46:38,298 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:46:38,298 INFO L85 PathProgramCache]: Analyzing trace with hash -1126874435, now seen corresponding path program 1 times [2024-10-14 17:46:38,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:46:38,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363434435] [2024-10-14 17:46:38,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:46:38,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:46:38,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:46:38,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:46:38,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:46:38,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363434435] [2024-10-14 17:46:38,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363434435] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:46:38,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 17:46:38,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 17:46:38,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547657135] [2024-10-14 17:46:38,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:46:38,378 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 17:46:38,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:46:38,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 17:46:38,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 17:46:38,379 INFO L87 Difference]: Start difference. First operand 48 states and 61 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:38,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:46:38,398 INFO L93 Difference]: Finished difference Result 47 states and 60 transitions. [2024-10-14 17:46:38,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 17:46:38,399 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2024-10-14 17:46:38,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:46:38,399 INFO L225 Difference]: With dead ends: 47 [2024-10-14 17:46:38,399 INFO L226 Difference]: Without dead ends: 44 [2024-10-14 17:46:38,399 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 17:46:38,400 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 23 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 17:46:38,400 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 48 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 17:46:38,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-10-14 17:46:38,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2024-10-14 17:46:38,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 38 states have (on average 1.4736842105263157) internal successors, (56), 43 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:38,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 56 transitions. [2024-10-14 17:46:38,401 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 56 transitions. Word has length 15 [2024-10-14 17:46:38,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:46:38,401 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 56 transitions. [2024-10-14 17:46:38,401 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:38,401 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 56 transitions. [2024-10-14 17:46:38,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-10-14 17:46:38,402 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:46:38,402 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:46:38,402 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-10-14 17:46:38,402 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-14 17:46:38,403 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:46:38,403 INFO L85 PathProgramCache]: Analyzing trace with hash -571136690, now seen corresponding path program 1 times [2024-10-14 17:46:38,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:46:38,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582798907] [2024-10-14 17:46:38,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:46:38,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:46:38,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:46:38,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:46:38,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:46:38,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582798907] [2024-10-14 17:46:38,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582798907] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:46:38,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 17:46:38,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-14 17:46:38,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721642149] [2024-10-14 17:46:38,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:46:38,452 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-14 17:46:38,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:46:38,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-14 17:46:38,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-14 17:46:38,452 INFO L87 Difference]: Start difference. First operand 44 states and 56 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) [2024-10-14 17:46:38,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:46:38,487 INFO L93 Difference]: Finished difference Result 43 states and 54 transitions. [2024-10-14 17:46:38,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 17:46:38,487 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 16 [2024-10-14 17:46:38,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:46:38,488 INFO L225 Difference]: With dead ends: 43 [2024-10-14 17:46:38,488 INFO L226 Difference]: Without dead ends: 43 [2024-10-14 17:46:38,488 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-14 17:46:38,489 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 28 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 17:46:38,489 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 47 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 17:46:38,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-10-14 17:46:38,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2024-10-14 17:46:38,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.4210526315789473) internal successors, (54), 42 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:38,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 54 transitions. [2024-10-14 17:46:38,493 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 54 transitions. Word has length 16 [2024-10-14 17:46:38,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:46:38,494 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 54 transitions. [2024-10-14 17:46:38,494 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) [2024-10-14 17:46:38,494 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 54 transitions. [2024-10-14 17:46:38,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-10-14 17:46:38,494 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:46:38,494 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:46:38,495 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-10-14 17:46:38,495 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-14 17:46:38,495 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:46:38,495 INFO L85 PathProgramCache]: Analyzing trace with hash -571136689, now seen corresponding path program 1 times [2024-10-14 17:46:38,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:46:38,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386818641] [2024-10-14 17:46:38,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:46:38,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:46:38,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:46:38,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:46:38,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:46:38,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386818641] [2024-10-14 17:46:38,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386818641] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:46:38,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 17:46:38,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-14 17:46:38,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188913195] [2024-10-14 17:46:38,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:46:38,594 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-14 17:46:38,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:46:38,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-14 17:46:38,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-10-14 17:46:38,595 INFO L87 Difference]: Start difference. First operand 43 states and 54 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:38,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:46:38,685 INFO L93 Difference]: Finished difference Result 73 states and 91 transitions. [2024-10-14 17:46:38,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-14 17:46:38,685 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 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 [2024-10-14 17:46:38,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:46:38,686 INFO L225 Difference]: With dead ends: 73 [2024-10-14 17:46:38,686 INFO L226 Difference]: Without dead ends: 73 [2024-10-14 17:46:38,686 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-10-14 17:46:38,687 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 41 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 17:46:38,687 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 64 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 17:46:38,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-10-14 17:46:38,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 48. [2024-10-14 17:46:38,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.3953488372093024) internal successors, (60), 47 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:38,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 60 transitions. [2024-10-14 17:46:38,689 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 60 transitions. Word has length 16 [2024-10-14 17:46:38,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:46:38,689 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 60 transitions. [2024-10-14 17:46:38,689 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:38,689 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 60 transitions. [2024-10-14 17:46:38,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-10-14 17:46:38,690 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:46:38,690 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:46:38,690 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-10-14 17:46:38,690 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-14 17:46:38,690 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:46:38,691 INFO L85 PathProgramCache]: Analyzing trace with hash -571127616, now seen corresponding path program 1 times [2024-10-14 17:46:38,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:46:38,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581929697] [2024-10-14 17:46:38,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:46:38,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:46:38,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:46:38,716 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:46:38,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:46:38,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581929697] [2024-10-14 17:46:38,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581929697] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:46:38,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 17:46:38,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-14 17:46:38,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387078906] [2024-10-14 17:46:38,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:46:38,718 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 17:46:38,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:46:38,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 17:46:38,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 17:46:38,719 INFO L87 Difference]: Start difference. First operand 48 states and 60 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:38,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:46:38,730 INFO L93 Difference]: Finished difference Result 50 states and 62 transitions. [2024-10-14 17:46:38,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 17:46:38,732 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2024-10-14 17:46:38,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:46:38,732 INFO L225 Difference]: With dead ends: 50 [2024-10-14 17:46:38,732 INFO L226 Difference]: Without dead ends: 50 [2024-10-14 17:46:38,733 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 17:46:38,733 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 0 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 17:46:38,733 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 47 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 17:46:38,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-10-14 17:46:38,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2024-10-14 17:46:38,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.3777777777777778) internal successors, (62), 49 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) [2024-10-14 17:46:38,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 62 transitions. [2024-10-14 17:46:38,734 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 62 transitions. Word has length 16 [2024-10-14 17:46:38,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:46:38,734 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 62 transitions. [2024-10-14 17:46:38,734 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:38,734 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 62 transitions. [2024-10-14 17:46:38,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-10-14 17:46:38,735 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:46:38,735 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:46:38,735 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-10-14 17:46:38,735 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-14 17:46:38,736 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:46:38,736 INFO L85 PathProgramCache]: Analyzing trace with hash 893496291, now seen corresponding path program 1 times [2024-10-14 17:46:38,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:46:38,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71397688] [2024-10-14 17:46:38,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:46:38,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:46:38,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:46:38,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:46:38,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:46:38,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71397688] [2024-10-14 17:46:38,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71397688] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:46:38,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 17:46:38,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-10-14 17:46:38,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729365530] [2024-10-14 17:46:38,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:46:38,904 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-14 17:46:38,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:46:38,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-14 17:46:38,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-10-14 17:46:38,905 INFO L87 Difference]: Start difference. First operand 50 states and 62 transitions. Second operand has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:39,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:46:39,050 INFO L93 Difference]: Finished difference Result 69 states and 83 transitions. [2024-10-14 17:46:39,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-14 17:46:39,050 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2024-10-14 17:46:39,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:46:39,051 INFO L225 Difference]: With dead ends: 69 [2024-10-14 17:46:39,051 INFO L226 Difference]: Without dead ends: 69 [2024-10-14 17:46:39,051 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2024-10-14 17:46:39,052 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 24 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 17:46:39,052 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 121 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 17:46:39,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-10-14 17:46:39,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 64. [2024-10-14 17:46:39,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 59 states have (on average 1.3220338983050848) internal successors, (78), 63 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:39,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 78 transitions. [2024-10-14 17:46:39,053 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 78 transitions. Word has length 18 [2024-10-14 17:46:39,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:46:39,054 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 78 transitions. [2024-10-14 17:46:39,054 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:39,054 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 78 transitions. [2024-10-14 17:46:39,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-10-14 17:46:39,055 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:46:39,055 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:46:39,055 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-10-14 17:46:39,055 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-14 17:46:39,056 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:46:39,056 INFO L85 PathProgramCache]: Analyzing trace with hash 902140815, now seen corresponding path program 1 times [2024-10-14 17:46:39,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:46:39,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172029926] [2024-10-14 17:46:39,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:46:39,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:46:39,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:46:39,112 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:46:39,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:46:39,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172029926] [2024-10-14 17:46:39,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172029926] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:46:39,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 17:46:39,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-14 17:46:39,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353293148] [2024-10-14 17:46:39,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:46:39,114 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-14 17:46:39,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:46:39,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-14 17:46:39,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-14 17:46:39,114 INFO L87 Difference]: Start difference. First operand 64 states and 78 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:39,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:46:39,143 INFO L93 Difference]: Finished difference Result 68 states and 82 transitions. [2024-10-14 17:46:39,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 17:46:39,143 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2024-10-14 17:46:39,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:46:39,144 INFO L225 Difference]: With dead ends: 68 [2024-10-14 17:46:39,144 INFO L226 Difference]: Without dead ends: 65 [2024-10-14 17:46:39,144 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-14 17:46:39,144 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 17:46:39,144 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 74 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 17:46:39,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-10-14 17:46:39,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2024-10-14 17:46:39,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.2666666666666666) internal successors, (76), 64 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:39,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 76 transitions. [2024-10-14 17:46:39,146 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 76 transitions. Word has length 18 [2024-10-14 17:46:39,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:46:39,146 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 76 transitions. [2024-10-14 17:46:39,146 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:39,146 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 76 transitions. [2024-10-14 17:46:39,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-10-14 17:46:39,146 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:46:39,146 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:46:39,146 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-10-14 17:46:39,147 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-14 17:46:39,147 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:46:39,147 INFO L85 PathProgramCache]: Analyzing trace with hash -694851611, now seen corresponding path program 1 times [2024-10-14 17:46:39,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:46:39,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199556213] [2024-10-14 17:46:39,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:46:39,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:46:39,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:46:39,305 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:46:39,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:46:39,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199556213] [2024-10-14 17:46:39,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199556213] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:46:39,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 17:46:39,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-10-14 17:46:39,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613533605] [2024-10-14 17:46:39,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:46:39,306 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-14 17:46:39,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:46:39,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-14 17:46:39,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-10-14 17:46:39,307 INFO L87 Difference]: Start difference. First operand 65 states and 76 transitions. Second operand has 12 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:39,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:46:39,445 INFO L93 Difference]: Finished difference Result 86 states and 100 transitions. [2024-10-14 17:46:39,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-14 17:46:39,445 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2024-10-14 17:46:39,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:46:39,446 INFO L225 Difference]: With dead ends: 86 [2024-10-14 17:46:39,446 INFO L226 Difference]: Without dead ends: 86 [2024-10-14 17:46:39,446 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2024-10-14 17:46:39,446 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 32 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 17:46:39,449 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 117 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 17:46:39,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2024-10-14 17:46:39,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 67. [2024-10-14 17:46:39,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.2903225806451613) internal successors, (80), 66 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:39,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 80 transitions. [2024-10-14 17:46:39,451 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 80 transitions. Word has length 18 [2024-10-14 17:46:39,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:46:39,451 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 80 transitions. [2024-10-14 17:46:39,451 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:39,451 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 80 transitions. [2024-10-14 17:46:39,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-10-14 17:46:39,451 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:46:39,451 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:46:39,452 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-10-14 17:46:39,452 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-14 17:46:39,452 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:46:39,452 INFO L85 PathProgramCache]: Analyzing trace with hash -343557646, now seen corresponding path program 1 times [2024-10-14 17:46:39,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:46:39,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935573418] [2024-10-14 17:46:39,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:46:39,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:46:39,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:46:39,540 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:46:39,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:46:39,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935573418] [2024-10-14 17:46:39,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935573418] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:46:39,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 17:46:39,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-10-14 17:46:39,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842706505] [2024-10-14 17:46:39,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:46:39,542 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-14 17:46:39,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:46:39,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-14 17:46:39,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-10-14 17:46:39,542 INFO L87 Difference]: Start difference. First operand 67 states and 80 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:39,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:46:39,580 INFO L93 Difference]: Finished difference Result 77 states and 90 transitions. [2024-10-14 17:46:39,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-14 17:46:39,581 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2024-10-14 17:46:39,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:46:39,581 INFO L225 Difference]: With dead ends: 77 [2024-10-14 17:46:39,581 INFO L226 Difference]: Without dead ends: 62 [2024-10-14 17:46:39,581 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-10-14 17:46:39,582 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 6 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 17:46:39,582 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 105 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 17:46:39,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-10-14 17:46:39,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2024-10-14 17:46:39,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 57 states have (on average 1.280701754385965) internal successors, (73), 61 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:39,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 73 transitions. [2024-10-14 17:46:39,583 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 73 transitions. Word has length 20 [2024-10-14 17:46:39,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:46:39,583 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 73 transitions. [2024-10-14 17:46:39,583 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:39,583 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 73 transitions. [2024-10-14 17:46:39,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-10-14 17:46:39,584 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:46:39,584 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:46:39,584 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-10-14 17:46:39,584 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-14 17:46:39,585 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:46:39,585 INFO L85 PathProgramCache]: Analyzing trace with hash -2032501388, now seen corresponding path program 1 times [2024-10-14 17:46:39,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:46:39,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536544282] [2024-10-14 17:46:39,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:46:39,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:46:39,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:46:39,697 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:46:39,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:46:39,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536544282] [2024-10-14 17:46:39,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536544282] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:46:39,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 17:46:39,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-10-14 17:46:39,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436660383] [2024-10-14 17:46:39,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:46:39,699 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-14 17:46:39,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:46:39,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-14 17:46:39,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-10-14 17:46:39,700 INFO L87 Difference]: Start difference. First operand 62 states and 73 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:39,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:46:39,742 INFO L93 Difference]: Finished difference Result 59 states and 69 transitions. [2024-10-14 17:46:39,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-14 17:46:39,742 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2024-10-14 17:46:39,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:46:39,742 INFO L225 Difference]: With dead ends: 59 [2024-10-14 17:46:39,742 INFO L226 Difference]: Without dead ends: 49 [2024-10-14 17:46:39,743 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-10-14 17:46:39,743 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 17 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 17:46:39,743 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 100 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 17:46:39,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-10-14 17:46:39,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2024-10-14 17:46:39,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.3095238095238095) internal successors, (55), 46 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:39,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2024-10-14 17:46:39,744 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 20 [2024-10-14 17:46:39,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:46:39,744 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2024-10-14 17:46:39,744 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:39,744 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2024-10-14 17:46:39,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-10-14 17:46:39,745 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:46:39,745 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:46:39,745 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-10-14 17:46:39,745 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-14 17:46:39,745 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:46:39,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1493796440, now seen corresponding path program 1 times [2024-10-14 17:46:39,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:46:39,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769377464] [2024-10-14 17:46:39,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:46:39,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:46:39,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:46:39,855 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 17:46:39,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:46:39,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769377464] [2024-10-14 17:46:39,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769377464] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:46:39,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 17:46:39,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-10-14 17:46:39,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218377567] [2024-10-14 17:46:39,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:46:39,855 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-14 17:46:39,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:46:39,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-14 17:46:39,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-10-14 17:46:39,856 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:39,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:46:39,908 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2024-10-14 17:46:39,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-14 17:46:39,908 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2024-10-14 17:46:39,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:46:39,909 INFO L225 Difference]: With dead ends: 54 [2024-10-14 17:46:39,909 INFO L226 Difference]: Without dead ends: 41 [2024-10-14 17:46:39,909 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-10-14 17:46:39,909 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 3 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 17:46:39,910 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 113 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 17:46:39,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-10-14 17:46:39,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2024-10-14 17:46:39,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.3055555555555556) internal successors, (47), 40 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) [2024-10-14 17:46:39,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2024-10-14 17:46:39,911 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 20 [2024-10-14 17:46:39,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:46:39,911 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2024-10-14 17:46:39,911 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:39,911 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2024-10-14 17:46:39,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-10-14 17:46:39,911 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:46:39,911 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:46:39,912 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-10-14 17:46:39,912 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-14 17:46:39,912 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:46:39,912 INFO L85 PathProgramCache]: Analyzing trace with hash 807026150, now seen corresponding path program 1 times [2024-10-14 17:46:39,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:46:39,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746776924] [2024-10-14 17:46:39,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:46:39,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:46:39,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:46:40,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 17:46:40,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:46:40,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746776924] [2024-10-14 17:46:40,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746776924] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 17:46:40,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 17:46:40,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-10-14 17:46:40,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138524432] [2024-10-14 17:46:40,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 17:46:40,043 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-14 17:46:40,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:46:40,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-14 17:46:40,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-10-14 17:46:40,044 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:40,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:46:40,102 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2024-10-14 17:46:40,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-14 17:46:40,102 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2024-10-14 17:46:40,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:46:40,103 INFO L225 Difference]: With dead ends: 50 [2024-10-14 17:46:40,103 INFO L226 Difference]: Without dead ends: 43 [2024-10-14 17:46:40,103 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-10-14 17:46:40,103 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 11 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 17:46:40,103 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 117 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 17:46:40,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-10-14 17:46:40,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2024-10-14 17:46:40,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 41 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:40,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2024-10-14 17:46:40,104 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 20 [2024-10-14 17:46:40,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:46:40,104 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2024-10-14 17:46:40,104 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:40,105 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2024-10-14 17:46:40,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-10-14 17:46:40,105 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:46:40,105 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:46:40,105 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-10-14 17:46:40,105 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-14 17:46:40,105 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:46:40,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1712135509, now seen corresponding path program 1 times [2024-10-14 17:46:40,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:46:40,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908169205] [2024-10-14 17:46:40,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:46:40,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:46:40,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:46:40,299 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 17:46:40,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:46:40,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908169205] [2024-10-14 17:46:40,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908169205] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:46:40,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252765328] [2024-10-14 17:46:40,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:46:40,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:46:40,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:46:40,301 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 17:46:40,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-14 17:46:40,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:46:40,374 INFO L255 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-14 17:46:40,375 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:46:40,448 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 17:46:40,448 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:46:40,530 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 [2024-10-14 17:46:40,552 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 17:46:40,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252765328] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:46:40,553 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:46:40,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 17 [2024-10-14 17:46:40,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810392115] [2024-10-14 17:46:40,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:46:40,553 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-14 17:46:40,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:46:40,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-14 17:46:40,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2024-10-14 17:46:40,554 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand has 18 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 18 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) [2024-10-14 17:46:40,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:46:40,705 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2024-10-14 17:46:40,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-14 17:46:40,706 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 18 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) Word has length 22 [2024-10-14 17:46:40,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:46:40,706 INFO L225 Difference]: With dead ends: 51 [2024-10-14 17:46:40,706 INFO L226 Difference]: Without dead ends: 47 [2024-10-14 17:46:40,707 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2024-10-14 17:46:40,707 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 84 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 17:46:40,708 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 92 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 17:46:40,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-10-14 17:46:40,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 38. [2024-10-14 17:46:40,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 37 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:40,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2024-10-14 17:46:40,710 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 22 [2024-10-14 17:46:40,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:46:40,710 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2024-10-14 17:46:40,710 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 18 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) [2024-10-14 17:46:40,710 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2024-10-14 17:46:40,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-10-14 17:46:40,710 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:46:40,711 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:46:40,724 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-14 17:46:40,914 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:46:40,915 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-14 17:46:40,915 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:46:40,915 INFO L85 PathProgramCache]: Analyzing trace with hash 389715684, now seen corresponding path program 1 times [2024-10-14 17:46:40,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:46:40,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849466499] [2024-10-14 17:46:40,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:46:40,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:46:40,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:46:41,076 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 17:46:41,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:46:41,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849466499] [2024-10-14 17:46:41,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849466499] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:46:41,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391398874] [2024-10-14 17:46:41,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:46:41,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:46:41,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:46:41,078 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 17:46:41,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-14 17:46:41,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:46:41,150 INFO L255 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-14 17:46:41,151 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:46:41,228 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 17:46:41,229 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:46:41,342 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 [2024-10-14 17:46:41,364 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 17:46:41,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391398874] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:46:41,364 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:46:41,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2024-10-14 17:46:41,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868552435] [2024-10-14 17:46:41,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:46:41,365 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-14 17:46:41,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:46:41,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-14 17:46:41,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2024-10-14 17:46:41,366 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand has 17 states, 16 states have (on average 3.5) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:41,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:46:41,472 INFO L93 Difference]: Finished difference Result 67 states and 77 transitions. [2024-10-14 17:46:41,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-14 17:46:41,472 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.5) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2024-10-14 17:46:41,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:46:41,473 INFO L225 Difference]: With dead ends: 67 [2024-10-14 17:46:41,473 INFO L226 Difference]: Without dead ends: 67 [2024-10-14 17:46:41,473 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2024-10-14 17:46:41,473 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 41 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 17:46:41,474 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 84 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 17:46:41,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-10-14 17:46:41,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 48. [2024-10-14 17:46:41,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 45 states have (on average 1.2666666666666666) internal successors, (57), 47 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:41,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2024-10-14 17:46:41,475 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 24 [2024-10-14 17:46:41,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:46:41,475 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2024-10-14 17:46:41,475 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.5) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:41,475 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2024-10-14 17:46:41,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-10-14 17:46:41,476 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:46:41,476 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:46:41,489 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-10-14 17:46:41,679 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:46:41,680 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-14 17:46:41,680 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:46:41,680 INFO L85 PathProgramCache]: Analyzing trace with hash -801148239, now seen corresponding path program 1 times [2024-10-14 17:46:41,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:46:41,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75382133] [2024-10-14 17:46:41,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:46:41,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:46:41,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:46:41,836 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 17:46:41,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:46:41,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75382133] [2024-10-14 17:46:41,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75382133] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:46:41,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256188153] [2024-10-14 17:46:41,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:46:41,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:46:41,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:46:41,838 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 17:46:41,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-14 17:46:41,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:46:41,905 INFO L255 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-14 17:46:41,906 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:46:41,990 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 17:46:41,990 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:46:42,093 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 [2024-10-14 17:46:42,114 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 17:46:42,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256188153] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:46:42,115 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:46:42,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2024-10-14 17:46:42,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119685874] [2024-10-14 17:46:42,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:46:42,115 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-14 17:46:42,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:46:42,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-14 17:46:42,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2024-10-14 17:46:42,116 INFO L87 Difference]: Start difference. First operand 48 states and 57 transitions. Second operand has 20 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:42,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:46:42,275 INFO L93 Difference]: Finished difference Result 59 states and 67 transitions. [2024-10-14 17:46:42,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-14 17:46:42,276 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2024-10-14 17:46:42,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:46:42,276 INFO L225 Difference]: With dead ends: 59 [2024-10-14 17:46:42,276 INFO L226 Difference]: Without dead ends: 59 [2024-10-14 17:46:42,277 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2024-10-14 17:46:42,277 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 69 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 17:46:42,277 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 96 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 17:46:42,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-10-14 17:46:42,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 51. [2024-10-14 17:46:42,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 48 states have (on average 1.25) internal successors, (60), 50 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:42,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 60 transitions. [2024-10-14 17:46:42,278 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 60 transitions. Word has length 25 [2024-10-14 17:46:42,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:46:42,278 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 60 transitions. [2024-10-14 17:46:42,278 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:42,278 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 60 transitions. [2024-10-14 17:46:42,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-10-14 17:46:42,279 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:46:42,279 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:46:42,291 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-14 17:46:42,482 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:46:42,483 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-14 17:46:42,483 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:46:42,483 INFO L85 PathProgramCache]: Analyzing trace with hash -1104271163, now seen corresponding path program 2 times [2024-10-14 17:46:42,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:46:42,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695909959] [2024-10-14 17:46:42,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:46:42,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:46:42,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:46:42,770 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 17:46:42,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:46:42,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695909959] [2024-10-14 17:46:42,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695909959] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:46:42,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726565828] [2024-10-14 17:46:42,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 17:46:42,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:46:42,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:46:42,772 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 17:46:42,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-14 17:46:42,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 17:46:42,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 17:46:42,850 INFO L255 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-10-14 17:46:42,852 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:46:42,909 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 [2024-10-14 17:46:42,965 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 17:46:42,965 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:46:42,982 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 [2024-10-14 17:46:42,984 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-10-14 17:46:43,030 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 17:46:43,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726565828] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:46:43,030 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:46:43,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 23 [2024-10-14 17:46:43,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661715876] [2024-10-14 17:46:43,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:46:43,031 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-14 17:46:43,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:46:43,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-14 17:46:43,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2024-10-14 17:46:43,032 INFO L87 Difference]: Start difference. First operand 51 states and 60 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:43,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:46:43,513 INFO L93 Difference]: Finished difference Result 125 states and 139 transitions. [2024-10-14 17:46:43,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-10-14 17:46:43,513 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2024-10-14 17:46:43,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:46:43,514 INFO L225 Difference]: With dead ends: 125 [2024-10-14 17:46:43,514 INFO L226 Difference]: Without dead ends: 119 [2024-10-14 17:46:43,514 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=212, Invalid=1594, Unknown=0, NotChecked=0, Total=1806 [2024-10-14 17:46:43,515 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 70 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-14 17:46:43,515 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 130 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-14 17:46:43,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2024-10-14 17:46:43,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 98. [2024-10-14 17:46:43,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 95 states have (on average 1.2) internal successors, (114), 97 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:43,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 114 transitions. [2024-10-14 17:46:43,517 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 114 transitions. Word has length 27 [2024-10-14 17:46:43,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:46:43,517 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 114 transitions. [2024-10-14 17:46:43,517 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:43,517 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 114 transitions. [2024-10-14 17:46:43,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-10-14 17:46:43,517 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:46:43,518 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:46:43,530 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-14 17:46:43,718 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:46:43,718 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-14 17:46:43,719 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:46:43,719 INFO L85 PathProgramCache]: Analyzing trace with hash -642850723, now seen corresponding path program 1 times [2024-10-14 17:46:43,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:46:43,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950082011] [2024-10-14 17:46:43,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:46:43,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:46:43,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:46:43,878 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 17:46:43,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:46:43,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950082011] [2024-10-14 17:46:43,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950082011] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:46:43,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910735674] [2024-10-14 17:46:43,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:46:43,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:46:43,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:46:43,879 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 17:46:43,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-14 17:46:43,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:46:43,950 INFO L255 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-10-14 17:46:43,952 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:46:44,049 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 17:46:44,049 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:46:44,159 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 [2024-10-14 17:46:44,179 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 17:46:44,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910735674] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:46:44,179 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:46:44,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2024-10-14 17:46:44,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919775692] [2024-10-14 17:46:44,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:46:44,181 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-14 17:46:44,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:46:44,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-14 17:46:44,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2024-10-14 17:46:44,181 INFO L87 Difference]: Start difference. First operand 98 states and 114 transitions. Second operand has 19 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 19 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:44,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:46:44,410 INFO L93 Difference]: Finished difference Result 126 states and 140 transitions. [2024-10-14 17:46:44,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-14 17:46:44,410 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 19 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2024-10-14 17:46:44,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:46:44,410 INFO L225 Difference]: With dead ends: 126 [2024-10-14 17:46:44,411 INFO L226 Difference]: Without dead ends: 126 [2024-10-14 17:46:44,411 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2024-10-14 17:46:44,411 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 51 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-14 17:46:44,411 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 129 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 363 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-14 17:46:44,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2024-10-14 17:46:44,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 98. [2024-10-14 17:46:44,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 95 states have (on average 1.1789473684210525) internal successors, (112), 97 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:44,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 112 transitions. [2024-10-14 17:46:44,413 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 112 transitions. Word has length 29 [2024-10-14 17:46:44,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:46:44,413 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 112 transitions. [2024-10-14 17:46:44,413 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 19 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:44,413 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 112 transitions. [2024-10-14 17:46:44,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-10-14 17:46:44,413 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:46:44,414 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:46:44,427 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-14 17:46:44,617 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:46:44,617 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-14 17:46:44,618 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:46:44,618 INFO L85 PathProgramCache]: Analyzing trace with hash -436351917, now seen corresponding path program 3 times [2024-10-14 17:46:44,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:46:44,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120778379] [2024-10-14 17:46:44,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:46:44,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:46:44,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:46:44,836 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-14 17:46:44,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:46:44,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120778379] [2024-10-14 17:46:44,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120778379] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:46:44,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552966623] [2024-10-14 17:46:44,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-14 17:46:44,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:46:44,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:46:44,838 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 17:46:44,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-14 17:46:44,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-14 17:46:44,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 17:46:44,938 INFO L255 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-14 17:46:44,940 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:46:45,064 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-14 17:46:45,064 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:46:45,198 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2024-10-14 17:46:45,230 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-14 17:46:45,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552966623] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:46:45,231 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:46:45,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2024-10-14 17:46:45,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379555314] [2024-10-14 17:46:45,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:46:45,231 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-14 17:46:45,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:46:45,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-14 17:46:45,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2024-10-14 17:46:45,232 INFO L87 Difference]: Start difference. First operand 98 states and 112 transitions. Second operand has 23 states, 22 states have (on average 3.1363636363636362) internal successors, (69), 23 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:45,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:46:45,485 INFO L93 Difference]: Finished difference Result 122 states and 140 transitions. [2024-10-14 17:46:45,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-14 17:46:45,485 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 3.1363636363636362) internal successors, (69), 23 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2024-10-14 17:46:45,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:46:45,486 INFO L225 Difference]: With dead ends: 122 [2024-10-14 17:46:45,486 INFO L226 Difference]: Without dead ends: 122 [2024-10-14 17:46:45,486 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=131, Invalid=625, Unknown=0, NotChecked=0, Total=756 [2024-10-14 17:46:45,487 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 102 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-14 17:46:45,487 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 184 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-14 17:46:45,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2024-10-14 17:46:45,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 105. [2024-10-14 17:46:45,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 102 states have (on average 1.196078431372549) internal successors, (122), 104 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:45,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 122 transitions. [2024-10-14 17:46:45,488 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 122 transitions. Word has length 31 [2024-10-14 17:46:45,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:46:45,489 INFO L471 AbstractCegarLoop]: Abstraction has 105 states and 122 transitions. [2024-10-14 17:46:45,489 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 3.1363636363636362) internal successors, (69), 23 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:45,489 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 122 transitions. [2024-10-14 17:46:45,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-10-14 17:46:45,489 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:46:45,489 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:46:45,502 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-10-14 17:46:45,689 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,SelfDestructingSolverStorable34 [2024-10-14 17:46:45,690 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-14 17:46:45,690 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:46:45,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1364247040, now seen corresponding path program 2 times [2024-10-14 17:46:45,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:46:45,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180104089] [2024-10-14 17:46:45,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:46:45,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:46:45,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:46:45,865 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 17:46:45,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:46:45,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180104089] [2024-10-14 17:46:45,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180104089] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:46:45,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693107969] [2024-10-14 17:46:45,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 17:46:45,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:46:45,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:46:45,869 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 17:46:45,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-14 17:46:45,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 17:46:45,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 17:46:45,940 INFO L255 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-10-14 17:46:45,941 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:46:45,987 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 [2024-10-14 17:46:46,036 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 17:46:46,036 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:46:46,055 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 [2024-10-14 17:46:46,057 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 [2024-10-14 17:46:46,095 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 17:46:46,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693107969] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:46:46,095 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:46:46,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2024-10-14 17:46:46,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97944394] [2024-10-14 17:46:46,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:46:46,096 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-14 17:46:46,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:46:46,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-14 17:46:46,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2024-10-14 17:46:46,097 INFO L87 Difference]: Start difference. First operand 105 states and 122 transitions. Second operand has 20 states, 20 states have (on average 2.9) internal successors, (58), 20 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:46,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:46:46,184 INFO L93 Difference]: Finished difference Result 124 states and 139 transitions. [2024-10-14 17:46:46,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-14 17:46:46,184 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.9) internal successors, (58), 20 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2024-10-14 17:46:46,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:46:46,185 INFO L225 Difference]: With dead ends: 124 [2024-10-14 17:46:46,185 INFO L226 Difference]: Without dead ends: 85 [2024-10-14 17:46:46,185 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2024-10-14 17:46:46,185 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 7 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 17:46:46,185 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 126 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 17:46:46,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2024-10-14 17:46:46,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2024-10-14 17:46:46,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 81 states have (on average 1.1975308641975309) internal successors, (97), 83 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:46,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 97 transitions. [2024-10-14 17:46:46,187 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 97 transitions. Word has length 33 [2024-10-14 17:46:46,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:46:46,187 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 97 transitions. [2024-10-14 17:46:46,187 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.9) internal successors, (58), 20 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:46,187 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 97 transitions. [2024-10-14 17:46:46,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-10-14 17:46:46,187 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:46:46,213 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:46:46,232 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-14 17:46:46,417 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-10-14 17:46:46,418 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-14 17:46:46,418 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:46:46,418 INFO L85 PathProgramCache]: Analyzing trace with hash 1507556083, now seen corresponding path program 2 times [2024-10-14 17:46:46,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:46:46,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038794698] [2024-10-14 17:46:46,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:46:46,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:46:46,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:46:46,612 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-14 17:46:46,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:46:46,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038794698] [2024-10-14 17:46:46,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038794698] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:46:46,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872676525] [2024-10-14 17:46:46,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 17:46:46,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:46:46,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:46:46,615 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 17:46:46,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-14 17:46:46,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 17:46:46,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 17:46:46,697 INFO L255 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-10-14 17:46:46,699 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:46:46,761 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 [2024-10-14 17:46:46,846 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-14 17:46:46,847 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:46:46,869 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 [2024-10-14 17:46:46,871 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 [2024-10-14 17:46:46,921 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-14 17:46:46,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872676525] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:46:46,921 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:46:46,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 12] total 22 [2024-10-14 17:46:46,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858019256] [2024-10-14 17:46:46,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:46:46,922 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-14 17:46:46,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:46:46,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-14 17:46:46,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=413, Unknown=0, NotChecked=0, Total=462 [2024-10-14 17:46:46,922 INFO L87 Difference]: Start difference. First operand 84 states and 97 transitions. Second operand has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:47,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:46:47,585 INFO L93 Difference]: Finished difference Result 140 states and 155 transitions. [2024-10-14 17:46:47,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-10-14 17:46:47,585 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2024-10-14 17:46:47,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:46:47,585 INFO L225 Difference]: With dead ends: 140 [2024-10-14 17:46:47,585 INFO L226 Difference]: Without dead ends: 136 [2024-10-14 17:46:47,586 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=191, Invalid=1789, Unknown=0, NotChecked=0, Total=1980 [2024-10-14 17:46:47,586 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 95 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 891 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 894 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 891 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-14 17:46:47,587 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 256 Invalid, 894 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 891 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-14 17:46:47,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2024-10-14 17:46:47,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 121. [2024-10-14 17:46:47,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 118 states have (on average 1.1779661016949152) internal successors, (139), 120 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:47,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 139 transitions. [2024-10-14 17:46:47,589 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 139 transitions. Word has length 34 [2024-10-14 17:46:47,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:46:47,589 INFO L471 AbstractCegarLoop]: Abstraction has 121 states and 139 transitions. [2024-10-14 17:46:47,589 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:47,589 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 139 transitions. [2024-10-14 17:46:47,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-10-14 17:46:47,589 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:46:47,589 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:46:47,610 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-10-14 17:46:47,790 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,SelfDestructingSolverStorable36 [2024-10-14 17:46:47,790 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-14 17:46:47,790 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:46:47,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1139012957, now seen corresponding path program 3 times [2024-10-14 17:46:47,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:46:47,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210705644] [2024-10-14 17:46:47,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:46:47,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:46:47,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:46:47,969 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 17:46:47,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:46:47,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210705644] [2024-10-14 17:46:47,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210705644] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:46:47,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024216276] [2024-10-14 17:46:47,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-14 17:46:47,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:46:47,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:46:47,972 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 17:46:47,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-14 17:46:48,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-14 17:46:48,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 17:46:48,056 INFO L255 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-10-14 17:46:48,057 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:46:48,191 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 17:46:48,191 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:46:48,348 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2024-10-14 17:46:48,382 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 17:46:48,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024216276] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:46:48,382 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:46:48,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 23 [2024-10-14 17:46:48,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902047933] [2024-10-14 17:46:48,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:46:48,383 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-14 17:46:48,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:46:48,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-14 17:46:48,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2024-10-14 17:46:48,384 INFO L87 Difference]: Start difference. First operand 121 states and 139 transitions. Second operand has 24 states, 23 states have (on average 3.8260869565217392) internal successors, (88), 24 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:48,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:46:48,616 INFO L93 Difference]: Finished difference Result 218 states and 246 transitions. [2024-10-14 17:46:48,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-14 17:46:48,616 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.8260869565217392) internal successors, (88), 24 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2024-10-14 17:46:48,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:46:48,617 INFO L225 Difference]: With dead ends: 218 [2024-10-14 17:46:48,617 INFO L226 Difference]: Without dead ends: 218 [2024-10-14 17:46:48,618 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2024-10-14 17:46:48,618 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 56 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-14 17:46:48,618 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 156 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 458 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-14 17:46:48,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2024-10-14 17:46:48,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 164. [2024-10-14 17:46:48,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 161 states have (on average 1.1801242236024845) internal successors, (190), 163 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:48,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 190 transitions. [2024-10-14 17:46:48,621 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 190 transitions. Word has length 35 [2024-10-14 17:46:48,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:46:48,621 INFO L471 AbstractCegarLoop]: Abstraction has 164 states and 190 transitions. [2024-10-14 17:46:48,621 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.8260869565217392) internal successors, (88), 24 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:48,621 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 190 transitions. [2024-10-14 17:46:48,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-10-14 17:46:48,622 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:46:48,622 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:46:48,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-10-14 17:46:48,825 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,SelfDestructingSolverStorable37 [2024-10-14 17:46:48,825 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-14 17:46:48,826 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:46:48,826 INFO L85 PathProgramCache]: Analyzing trace with hash 1730777031, now seen corresponding path program 1 times [2024-10-14 17:46:48,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:46:48,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350116031] [2024-10-14 17:46:48,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:46:48,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:46:48,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:46:48,984 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-14 17:46:48,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:46:48,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350116031] [2024-10-14 17:46:48,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350116031] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:46:48,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085131275] [2024-10-14 17:46:48,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:46:48,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:46:48,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:46:48,987 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 17:46:48,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-14 17:46:49,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:46:49,067 INFO L255 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-10-14 17:46:49,068 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:46:49,193 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-14 17:46:49,193 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:46:49,348 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 [2024-10-14 17:46:49,388 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-14 17:46:49,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085131275] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:46:49,389 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:46:49,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 21 [2024-10-14 17:46:49,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295587318] [2024-10-14 17:46:49,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:46:49,390 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-14 17:46:49,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:46:49,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-14 17:46:49,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2024-10-14 17:46:49,391 INFO L87 Difference]: Start difference. First operand 164 states and 190 transitions. Second operand has 22 states, 21 states have (on average 3.8095238095238093) internal successors, (80), 22 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:49,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:46:49,671 INFO L93 Difference]: Finished difference Result 178 states and 198 transitions. [2024-10-14 17:46:49,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-14 17:46:49,672 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.8095238095238093) internal successors, (80), 22 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2024-10-14 17:46:49,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:46:49,672 INFO L225 Difference]: With dead ends: 178 [2024-10-14 17:46:49,672 INFO L226 Difference]: Without dead ends: 178 [2024-10-14 17:46:49,673 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 60 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2024-10-14 17:46:49,673 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 48 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-14 17:46:49,673 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 162 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 504 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-14 17:46:49,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2024-10-14 17:46:49,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 164. [2024-10-14 17:46:49,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 161 states have (on average 1.1677018633540373) internal successors, (188), 163 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:49,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 188 transitions. [2024-10-14 17:46:49,675 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 188 transitions. Word has length 38 [2024-10-14 17:46:49,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:46:49,676 INFO L471 AbstractCegarLoop]: Abstraction has 164 states and 188 transitions. [2024-10-14 17:46:49,676 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.8095238095238093) internal successors, (80), 22 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:49,676 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 188 transitions. [2024-10-14 17:46:49,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-10-14 17:46:49,676 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:46:49,676 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:46:49,694 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-10-14 17:46:49,877 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,SelfDestructingSolverStorable38 [2024-10-14 17:46:49,877 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-14 17:46:49,877 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:46:49,877 INFO L85 PathProgramCache]: Analyzing trace with hash 2136003830, now seen corresponding path program 4 times [2024-10-14 17:46:49,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:46:49,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962567880] [2024-10-14 17:46:49,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:46:49,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:46:49,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:46:50,083 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-14 17:46:50,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:46:50,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962567880] [2024-10-14 17:46:50,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962567880] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:46:50,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917087166] [2024-10-14 17:46:50,085 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-14 17:46:50,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:46:50,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:46:50,087 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 17:46:50,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-14 17:46:50,167 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-14 17:46:50,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 17:46:50,173 INFO L255 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-10-14 17:46:50,174 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:46:50,204 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 [2024-10-14 17:46:50,690 INFO L349 Elim1Store]: treesize reduction 8, result has 76.5 percent of original size [2024-10-14 17:46:50,690 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 50 [2024-10-14 17:46:50,753 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-10-14 17:46:50,753 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:46:51,116 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 38 [2024-10-14 17:46:51,121 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-14 17:46:51,131 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 58 [2024-10-14 17:46:51,152 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-10-14 17:46:51,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917087166] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:46:51,152 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:46:51,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 32 [2024-10-14 17:46:51,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012590901] [2024-10-14 17:46:51,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:46:51,153 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-10-14 17:46:51,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:46:51,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-10-14 17:46:51,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=900, Unknown=0, NotChecked=0, Total=1056 [2024-10-14 17:46:51,153 INFO L87 Difference]: Start difference. First operand 164 states and 188 transitions. Second operand has 33 states, 32 states have (on average 2.53125) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:54,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:46:54,919 INFO L93 Difference]: Finished difference Result 188 states and 211 transitions. [2024-10-14 17:46:54,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-10-14 17:46:54,920 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.53125) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2024-10-14 17:46:54,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:46:54,921 INFO L225 Difference]: With dead ends: 188 [2024-10-14 17:46:54,921 INFO L226 Difference]: Without dead ends: 188 [2024-10-14 17:46:54,922 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 645 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=561, Invalid=2631, Unknown=0, NotChecked=0, Total=3192 [2024-10-14 17:46:54,922 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 103 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 727 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-14 17:46:54,922 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 160 Invalid, 727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 727 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-14 17:46:54,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2024-10-14 17:46:54,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 154. [2024-10-14 17:46:54,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 152 states have (on average 1.131578947368421) internal successors, (172), 153 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:54,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 172 transitions. [2024-10-14 17:46:54,925 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 172 transitions. Word has length 38 [2024-10-14 17:46:54,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:46:54,925 INFO L471 AbstractCegarLoop]: Abstraction has 154 states and 172 transitions. [2024-10-14 17:46:54,925 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.53125) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:54,925 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 172 transitions. [2024-10-14 17:46:54,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-10-14 17:46:54,926 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:46:54,926 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:46:54,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-10-14 17:46:55,126 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,SelfDestructingSolverStorable39 [2024-10-14 17:46:55,126 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-14 17:46:55,127 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:46:55,127 INFO L85 PathProgramCache]: Analyzing trace with hash -543847568, now seen corresponding path program 3 times [2024-10-14 17:46:55,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:46:55,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903078183] [2024-10-14 17:46:55,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:46:55,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:46:55,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:46:55,547 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 12 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:46:55,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:46:55,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903078183] [2024-10-14 17:46:55,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903078183] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:46:55,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244575668] [2024-10-14 17:46:55,548 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-14 17:46:55,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:46:55,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:46:55,551 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 17:46:55,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-14 17:46:55,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-10-14 17:46:55,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 17:46:55,642 INFO L255 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-10-14 17:46:55,643 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:46:55,719 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 [2024-10-14 17:46:55,809 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-14 17:46:55,809 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:46:55,833 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 [2024-10-14 17:46:55,836 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 [2024-10-14 17:46:55,891 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-14 17:46:55,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244575668] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:46:55,891 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:46:55,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14, 14] total 32 [2024-10-14 17:46:55,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116702327] [2024-10-14 17:46:55,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:46:55,891 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-10-14 17:46:55,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:46:55,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-10-14 17:46:55,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=914, Unknown=0, NotChecked=0, Total=992 [2024-10-14 17:46:55,892 INFO L87 Difference]: Start difference. First operand 154 states and 172 transitions. Second operand has 32 states, 32 states have (on average 2.4375) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:56,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:46:56,817 INFO L93 Difference]: Finished difference Result 330 states and 366 transitions. [2024-10-14 17:46:56,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2024-10-14 17:46:56,817 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2024-10-14 17:46:56,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:46:56,818 INFO L225 Difference]: With dead ends: 330 [2024-10-14 17:46:56,818 INFO L226 Difference]: Without dead ends: 324 [2024-10-14 17:46:56,819 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 859 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=332, Invalid=3828, Unknown=0, NotChecked=0, Total=4160 [2024-10-14 17:46:56,819 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 118 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 1323 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 1331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-14 17:46:56,820 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 424 Invalid, 1331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1323 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-14 17:46:56,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2024-10-14 17:46:56,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 249. [2024-10-14 17:46:56,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 247 states have (on average 1.1538461538461537) internal successors, (285), 248 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:56,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 285 transitions. [2024-10-14 17:46:56,827 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 285 transitions. Word has length 41 [2024-10-14 17:46:56,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:46:56,827 INFO L471 AbstractCegarLoop]: Abstraction has 249 states and 285 transitions. [2024-10-14 17:46:56,827 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:46:56,827 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 285 transitions. [2024-10-14 17:46:56,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-10-14 17:46:56,828 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:46:56,828 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:46:56,842 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-10-14 17:46:57,028 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:46:57,028 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-14 17:46:57,028 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:46:57,029 INFO L85 PathProgramCache]: Analyzing trace with hash 510007207, now seen corresponding path program 4 times [2024-10-14 17:46:57,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:46:57,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656661470] [2024-10-14 17:46:57,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:46:57,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:46:57,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:46:57,675 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 17 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:46:57,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:46:57,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656661470] [2024-10-14 17:46:57,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656661470] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:46:57,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063234869] [2024-10-14 17:46:57,675 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-14 17:46:57,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:46:57,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:46:57,677 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 17:46:57,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-10-14 17:46:57,757 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-14 17:46:57,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 17:46:57,763 INFO L255 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-10-14 17:46:57,764 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:46:57,798 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 [2024-10-14 17:46:58,358 INFO L349 Elim1Store]: treesize reduction 8, result has 76.5 percent of original size [2024-10-14 17:46:58,358 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 40 [2024-10-14 17:46:58,492 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-14 17:46:58,492 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:46:58,998 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 38 [2024-10-14 17:46:59,005 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 58 [2024-10-14 17:46:59,016 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 [2024-10-14 17:46:59,037 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-14 17:46:59,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063234869] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:46:59,037 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:46:59,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 13] total 39 [2024-10-14 17:46:59,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504986424] [2024-10-14 17:46:59,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:46:59,037 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-10-14 17:46:59,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:46:59,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-10-14 17:46:59,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1319, Unknown=0, NotChecked=0, Total=1482 [2024-10-14 17:46:59,038 INFO L87 Difference]: Start difference. First operand 249 states and 285 transitions. Second operand has 39 states, 39 states have (on average 2.948717948717949) internal successors, (115), 39 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:47:00,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:47:00,335 INFO L93 Difference]: Finished difference Result 330 states and 367 transitions. [2024-10-14 17:47:00,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-10-14 17:47:00,335 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.948717948717949) internal successors, (115), 39 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2024-10-14 17:47:00,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:47:00,336 INFO L225 Difference]: With dead ends: 330 [2024-10-14 17:47:00,336 INFO L226 Difference]: Without dead ends: 268 [2024-10-14 17:47:00,337 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=423, Invalid=3359, Unknown=0, NotChecked=0, Total=3782 [2024-10-14 17:47:00,337 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 54 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 885 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 885 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-14 17:47:00,337 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 284 Invalid, 888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 885 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-14 17:47:00,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2024-10-14 17:47:00,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 192. [2024-10-14 17:47:00,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 1.1465968586387434) internal successors, (219), 191 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:47:00,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 219 transitions. [2024-10-14 17:47:00,340 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 219 transitions. Word has length 44 [2024-10-14 17:47:00,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:47:00,340 INFO L471 AbstractCegarLoop]: Abstraction has 192 states and 219 transitions. [2024-10-14 17:47:00,340 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.948717948717949) internal successors, (115), 39 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:47:00,340 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 219 transitions. [2024-10-14 17:47:00,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-10-14 17:47:00,341 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:47:00,341 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:47:00,354 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-10-14 17:47:00,546 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:47:00,547 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-14 17:47:00,547 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:47:00,547 INFO L85 PathProgramCache]: Analyzing trace with hash -1080206692, now seen corresponding path program 2 times [2024-10-14 17:47:00,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:47:00,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37827432] [2024-10-14 17:47:00,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:47:00,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:47:00,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:47:00,972 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:47:00,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:47:00,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37827432] [2024-10-14 17:47:00,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37827432] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:47:00,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466386254] [2024-10-14 17:47:00,972 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 17:47:00,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:47:00,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:47:00,974 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 17:47:00,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-10-14 17:47:01,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 17:47:01,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 17:47:01,062 INFO L255 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 61 conjuncts are in the unsatisfiable core [2024-10-14 17:47:01,064 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:47:01,206 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 15 treesize of output 1 [2024-10-14 17:47:01,253 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 15 treesize of output 1 [2024-10-14 17:47:01,280 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 [2024-10-14 17:47:01,312 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 [2024-10-14 17:47:01,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-14 17:47:01,640 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 17:47:01,640 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 25 treesize of output 11 [2024-10-14 17:47:01,667 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 17:47:01,667 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:47:01,866 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 22 treesize of output 20 [2024-10-14 17:47:01,869 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2024-10-14 17:47:01,999 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 25 treesize of output 23 [2024-10-14 17:47:02,002 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 636 treesize of output 604 [2024-10-14 17:47:02,168 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 17:47:02,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466386254] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:47:02,168 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:47:02,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21, 19] total 50 [2024-10-14 17:47:02,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531913442] [2024-10-14 17:47:02,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:47:02,169 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-10-14 17:47:02,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:47:02,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-10-14 17:47:02,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=2221, Unknown=0, NotChecked=0, Total=2450 [2024-10-14 17:47:02,170 INFO L87 Difference]: Start difference. First operand 192 states and 219 transitions. Second operand has 50 states, 50 states have (on average 2.3) internal successors, (115), 50 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:47:03,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 17:47:03,215 INFO L93 Difference]: Finished difference Result 282 states and 315 transitions. [2024-10-14 17:47:03,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-10-14 17:47:03,215 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.3) internal successors, (115), 50 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2024-10-14 17:47:03,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 17:47:03,216 INFO L225 Difference]: With dead ends: 282 [2024-10-14 17:47:03,216 INFO L226 Difference]: Without dead ends: 282 [2024-10-14 17:47:03,217 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1312 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=472, Invalid=4640, Unknown=0, NotChecked=0, Total=5112 [2024-10-14 17:47:03,220 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 56 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 1362 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 1368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-14 17:47:03,220 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 321 Invalid, 1368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1362 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-14 17:47:03,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2024-10-14 17:47:03,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 239. [2024-10-14 17:47:03,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 1.134453781512605) internal successors, (270), 238 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:47:03,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 270 transitions. [2024-10-14 17:47:03,224 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 270 transitions. Word has length 45 [2024-10-14 17:47:03,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 17:47:03,224 INFO L471 AbstractCegarLoop]: Abstraction has 239 states and 270 transitions. [2024-10-14 17:47:03,224 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.3) internal successors, (115), 50 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:47:03,224 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 270 transitions. [2024-10-14 17:47:03,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-10-14 17:47:03,228 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 17:47:03,228 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 17:47:03,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-10-14 17:47:03,432 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:47:03,432 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-14 17:47:03,433 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 17:47:03,433 INFO L85 PathProgramCache]: Analyzing trace with hash 261370750, now seen corresponding path program 4 times [2024-10-14 17:47:03,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 17:47:03,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102263387] [2024-10-14 17:47:03,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 17:47:03,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 17:47:03,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 17:47:03,643 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-14 17:47:03,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 17:47:03,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102263387] [2024-10-14 17:47:03,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102263387] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 17:47:03,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739666842] [2024-10-14 17:47:03,644 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-14 17:47:03,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 17:47:03,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 17:47:03,645 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) [2024-10-14 17:47:03,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-10-14 17:47:03,733 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-14 17:47:03,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 17:47:03,735 INFO L255 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 76 conjuncts are in the unsatisfiable core [2024-10-14 17:47:03,737 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 17:47:03,804 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 19 treesize of output 1 [2024-10-14 17:47:03,823 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 19 treesize of output 1 [2024-10-14 17:47:03,829 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 [2024-10-14 17:47:03,857 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 [2024-10-14 17:47:24,312 INFO L349 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2024-10-14 17:47:24,313 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 66 treesize of output 45 [2024-10-14 17:47:24,384 INFO L349 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2024-10-14 17:47:24,384 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 41 [2024-10-14 17:47:24,466 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 40 refuted. 3 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-14 17:47:24,466 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 17:47:25,400 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 82 treesize of output 74 [2024-10-14 17:47:25,407 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 110 [2024-10-14 17:47:25,411 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 [2024-10-14 17:47:25,661 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 74 treesize of output 68 [2024-10-14 17:47:25,670 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 17:47:25,670 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 966 treesize of output 934 [2024-10-14 17:47:25,779 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-14 17:47:25,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739666842] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 17:47:25,779 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 17:47:25,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 23, 21] total 51 [2024-10-14 17:47:25,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035079944] [2024-10-14 17:47:25,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 17:47:25,779 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2024-10-14 17:47:25,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 17:47:25,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2024-10-14 17:47:25,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=2389, Unknown=5, NotChecked=0, Total=2652 [2024-10-14 17:47:25,780 INFO L87 Difference]: Start difference. First operand 239 states and 270 transitions. Second operand has 52 states, 51 states have (on average 2.0784313725490198) internal successors, (106), 52 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 17:47:32,702 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-14 17:47:42,129 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-14 17:48:02,815 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]