./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/valid-memsafety.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/openbsd_cstrpbrk-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 84cfde4a Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/openbsd_cstrpbrk-alloca-2.i -s /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d450427152972d80716d02c80706dd3b248a3fc7c05c71ffd29d66e32e1e82f2 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-11 17:48:20,946 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-11 17:48:21,045 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-11 17:48:21,051 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-11 17:48:21,054 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-11 17:48:21,083 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-11 17:48:21,085 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-11 17:48:21,086 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-11 17:48:21,087 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-11 17:48:21,088 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-11 17:48:21,089 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-11 17:48:21,089 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-11 17:48:21,090 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-11 17:48:21,090 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-11 17:48:21,092 INFO L153 SettingsManager]: * Use SBE=true [2024-10-11 17:48:21,092 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-11 17:48:21,092 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-11 17:48:21,093 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-11 17:48:21,093 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-11 17:48:21,093 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-11 17:48:21,094 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-11 17:48:21,094 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-11 17:48:21,094 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-11 17:48:21,095 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-11 17:48:21,095 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-11 17:48:21,095 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-11 17:48:21,096 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-11 17:48:21,096 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-11 17:48:21,096 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-11 17:48:21,097 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-11 17:48:21,097 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-11 17:48:21,097 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-11 17:48:21,097 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-11 17:48:21,097 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 17:48:21,098 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-11 17:48:21,098 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-11 17:48:21,098 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-11 17:48:21,098 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-11 17:48:21,099 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-11 17:48:21,099 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-11 17:48:21,099 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-11 17:48:21,100 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-11 17:48:21,101 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d450427152972d80716d02c80706dd3b248a3fc7c05c71ffd29d66e32e1e82f2 [2024-10-11 17:48:21,347 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-11 17:48:21,366 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-11 17:48:21,369 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-11 17:48:21,370 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-11 17:48:21,372 INFO L274 PluginConnector]: CDTParser initialized [2024-10-11 17:48:21,373 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/openbsd_cstrpbrk-alloca-2.i [2024-10-11 17:48:22,763 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-11 17:48:22,980 INFO L384 CDTParser]: Found 1 translation units. [2024-10-11 17:48:22,982 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/openbsd_cstrpbrk-alloca-2.i [2024-10-11 17:48:23,000 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/948a45aba/e366f3a4e9734b8db83e38928ec17b26/FLAG6c9069da2 [2024-10-11 17:48:23,013 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/948a45aba/e366f3a4e9734b8db83e38928ec17b26 [2024-10-11 17:48:23,015 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-11 17:48:23,017 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-11 17:48:23,019 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-11 17:48:23,019 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-11 17:48:23,026 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-11 17:48:23,026 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 05:48:23" (1/1) ... [2024-10-11 17:48:23,029 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48d17d57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:48:23, skipping insertion in model container [2024-10-11 17:48:23,029 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 05:48:23" (1/1) ... [2024-10-11 17:48:23,069 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-11 17:48:23,355 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 17:48:23,366 INFO L200 MainTranslator]: Completed pre-run [2024-10-11 17:48:23,404 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 17:48:23,437 INFO L204 MainTranslator]: Completed translation [2024-10-11 17:48:23,438 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:48:23 WrapperNode [2024-10-11 17:48:23,438 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-11 17:48:23,439 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-11 17:48:23,439 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-11 17:48:23,440 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-11 17:48:23,447 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:48:23" (1/1) ... [2024-10-11 17:48:23,459 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:48:23" (1/1) ... [2024-10-11 17:48:23,481 INFO L138 Inliner]: procedures = 117, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 95 [2024-10-11 17:48:23,482 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-11 17:48:23,482 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-11 17:48:23,483 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-11 17:48:23,483 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-11 17:48:23,492 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:48:23" (1/1) ... [2024-10-11 17:48:23,493 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:48:23" (1/1) ... [2024-10-11 17:48:23,497 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:48:23" (1/1) ... [2024-10-11 17:48:23,520 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [3, 3]. 50 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]. [2024-10-11 17:48:23,520 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:48:23" (1/1) ... [2024-10-11 17:48:23,520 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:48:23" (1/1) ... [2024-10-11 17:48:23,527 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:48:23" (1/1) ... [2024-10-11 17:48:23,530 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:48:23" (1/1) ... [2024-10-11 17:48:23,532 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:48:23" (1/1) ... [2024-10-11 17:48:23,533 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:48:23" (1/1) ... [2024-10-11 17:48:23,536 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-11 17:48:23,537 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-11 17:48:23,537 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-11 17:48:23,537 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-11 17:48:23,538 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:48:23" (1/1) ... [2024-10-11 17:48:23,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 17:48:23,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:48:23,576 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-11 17:48:23,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-11 17:48:23,634 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-11 17:48:23,634 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-11 17:48:23,634 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-11 17:48:23,634 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-11 17:48:23,635 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-11 17:48:23,635 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-11 17:48:23,635 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-11 17:48:23,635 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-11 17:48:23,755 INFO L238 CfgBuilder]: Building ICFG [2024-10-11 17:48:23,758 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-11 17:48:23,995 INFO L? ?]: Removed 59 outVars from TransFormulas that were not future-live. [2024-10-11 17:48:23,996 INFO L287 CfgBuilder]: Performing block encoding [2024-10-11 17:48:24,048 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-11 17:48:24,052 INFO L314 CfgBuilder]: Removed 4 assume(true) statements. [2024-10-11 17:48:24,052 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 05:48:24 BoogieIcfgContainer [2024-10-11 17:48:24,053 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-11 17:48:24,055 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-11 17:48:24,055 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-11 17:48:24,059 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-11 17:48:24,060 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 05:48:23" (1/3) ... [2024-10-11 17:48:24,060 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c4e6dc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 05:48:24, skipping insertion in model container [2024-10-11 17:48:24,061 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:48:23" (2/3) ... [2024-10-11 17:48:24,062 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c4e6dc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 05:48:24, skipping insertion in model container [2024-10-11 17:48:24,062 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 05:48:24" (3/3) ... [2024-10-11 17:48:24,063 INFO L112 eAbstractionObserver]: Analyzing ICFG openbsd_cstrpbrk-alloca-2.i [2024-10-11 17:48:24,079 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-11 17:48:24,080 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations. [2024-10-11 17:48:24,130 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 17:48:24,138 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;@214ad1de, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 17:48:24,138 INFO L334 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2024-10-11 17:48:24,143 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 22 states have (on average 2.090909090909091) internal successors, (46), 35 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:48:24,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-10-11 17:48:24,151 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:48:24,151 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-11 17:48:24,152 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-10-11 17:48:24,157 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:48:24,157 INFO L85 PathProgramCache]: Analyzing trace with hash -310554848, now seen corresponding path program 1 times [2024-10-11 17:48:24,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:48:24,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080702637] [2024-10-11 17:48:24,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:48:24,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:48:24,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:48:24,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:48:24,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:48:24,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080702637] [2024-10-11 17:48:24,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080702637] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 17:48:24,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 17:48:24,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 17:48:24,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469434720] [2024-10-11 17:48:24,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 17:48:24,595 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 17:48:24,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:48:24,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 17:48:24,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 17:48:24,627 INFO L87 Difference]: Start difference. First operand has 36 states, 22 states have (on average 2.090909090909091) internal successors, (46), 35 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:48:24,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:48:24,680 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2024-10-11 17:48:24,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 17:48:24,683 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-10-11 17:48:24,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:48:24,689 INFO L225 Difference]: With dead ends: 34 [2024-10-11 17:48:24,689 INFO L226 Difference]: Without dead ends: 33 [2024-10-11 17:48:24,691 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 17:48:24,696 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 12 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 17:48:24,697 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 43 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 17:48:24,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-10-11 17:48:24,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2024-10-11 17:48:24,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 32 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:48:24,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2024-10-11 17:48:24,733 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 6 [2024-10-11 17:48:24,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:48:24,735 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2024-10-11 17:48:24,735 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:48:24,735 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2024-10-11 17:48:24,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-10-11 17:48:24,736 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:48:24,736 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-11 17:48:24,736 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-11 17:48:24,736 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-10-11 17:48:24,737 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:48:24,737 INFO L85 PathProgramCache]: Analyzing trace with hash -310554847, now seen corresponding path program 1 times [2024-10-11 17:48:24,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:48:24,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581783108] [2024-10-11 17:48:24,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:48:24,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:48:24,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:48:25,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:48:25,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:48:25,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581783108] [2024-10-11 17:48:25,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581783108] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 17:48:25,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 17:48:25,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-11 17:48:25,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33033152] [2024-10-11 17:48:25,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 17:48:25,018 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 17:48:25,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:48:25,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 17:48:25,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-11 17:48:25,019 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:48:25,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:48:25,136 INFO L93 Difference]: Finished difference Result 47 states and 57 transitions. [2024-10-11 17:48:25,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 17:48:25,137 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-10-11 17:48:25,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:48:25,138 INFO L225 Difference]: With dead ends: 47 [2024-10-11 17:48:25,138 INFO L226 Difference]: Without dead ends: 47 [2024-10-11 17:48:25,139 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-10-11 17:48:25,140 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 16 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 17:48:25,140 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 90 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 17:48:25,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-10-11 17:48:25,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 37. [2024-10-11 17:48:25,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 36 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:48:25,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2024-10-11 17:48:25,146 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 6 [2024-10-11 17:48:25,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:48:25,147 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2024-10-11 17:48:25,147 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:48:25,148 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2024-10-11 17:48:25,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-10-11 17:48:25,148 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:48:25,148 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-11 17:48:25,148 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-11 17:48:25,149 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-10-11 17:48:25,149 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:48:25,150 INFO L85 PathProgramCache]: Analyzing trace with hash -308707805, now seen corresponding path program 1 times [2024-10-11 17:48:25,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:48:25,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868504715] [2024-10-11 17:48:25,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:48:25,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:48:25,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:48:25,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:48:25,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:48:25,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868504715] [2024-10-11 17:48:25,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868504715] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 17:48:25,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 17:48:25,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-11 17:48:25,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361486539] [2024-10-11 17:48:25,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 17:48:25,459 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-11 17:48:25,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:48:25,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-11 17:48:25,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-10-11 17:48:25,460 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:48:25,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:48:25,526 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2024-10-11 17:48:25,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 17:48:25,527 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-10-11 17:48:25,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:48:25,527 INFO L225 Difference]: With dead ends: 39 [2024-10-11 17:48:25,529 INFO L226 Difference]: Without dead ends: 39 [2024-10-11 17:48:25,529 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-10-11 17:48:25,530 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 29 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 17:48:25,531 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 63 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 17:48:25,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-10-11 17:48:25,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2024-10-11 17:48:25,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 34 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:48:25,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2024-10-11 17:48:25,539 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 6 [2024-10-11 17:48:25,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:48:25,540 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2024-10-11 17:48:25,540 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:48:25,541 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2024-10-11 17:48:25,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-10-11 17:48:25,541 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:48:25,541 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-10-11 17:48:25,542 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-11 17:48:25,542 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-10-11 17:48:25,543 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:48:25,546 INFO L85 PathProgramCache]: Analyzing trace with hash -2090382119, now seen corresponding path program 1 times [2024-10-11 17:48:25,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:48:25,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579979296] [2024-10-11 17:48:25,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:48:25,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:48:25,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:48:25,602 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:48:25,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:48:25,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579979296] [2024-10-11 17:48:25,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579979296] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:48:25,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143636298] [2024-10-11 17:48:25,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:48:25,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:48:25,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:48:25,606 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:48:25,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-11 17:48:25,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:48:25,677 INFO L255 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-11 17:48:25,681 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:48:25,750 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:48:25,751 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 17:48:25,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143636298] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 17:48:25,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-11 17:48:25,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2024-10-11 17:48:25,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895273147] [2024-10-11 17:48:25,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 17:48:25,752 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 17:48:25,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:48:25,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 17:48:25,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-10-11 17:48:25,753 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:48:25,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:48:25,793 INFO L93 Difference]: Finished difference Result 47 states and 56 transitions. [2024-10-11 17:48:25,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 17:48:25,795 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-10-11 17:48:25,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:48:25,795 INFO L225 Difference]: With dead ends: 47 [2024-10-11 17:48:25,796 INFO L226 Difference]: Without dead ends: 47 [2024-10-11 17:48:25,796 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-10-11 17:48:25,797 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 9 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 17:48:25,797 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 78 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 17:48:25,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-10-11 17:48:25,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2024-10-11 17:48:25,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 29 states have (on average 1.6206896551724137) internal successors, (47), 39 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) [2024-10-11 17:48:25,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2024-10-11 17:48:25,807 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 8 [2024-10-11 17:48:25,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:48:25,808 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2024-10-11 17:48:25,808 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:48:25,808 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2024-10-11 17:48:25,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-10-11 17:48:25,809 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:48:25,809 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-10-11 17:48:25,826 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-11 17:48:26,014 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:48:26,014 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-10-11 17:48:26,015 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:48:26,015 INFO L85 PathProgramCache]: Analyzing trace with hash -315374757, now seen corresponding path program 1 times [2024-10-11 17:48:26,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:48:26,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334783180] [2024-10-11 17:48:26,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:48:26,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:48:26,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:48:26,286 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:48:26,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:48:26,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334783180] [2024-10-11 17:48:26,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334783180] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:48:26,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642047453] [2024-10-11 17:48:26,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:48:26,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:48:26,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:48:26,289 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:48:26,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-11 17:48:26,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:48:26,356 INFO L255 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-11 17:48:26,358 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:48:26,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-11 17:48:26,421 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 [2024-10-11 17:48:26,432 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 [2024-10-11 17:48:26,567 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:48:26,567 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:48:26,719 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-11 17:48:26,757 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:48:26,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642047453] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:48:26,758 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:48:26,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2024-10-11 17:48:26,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871229488] [2024-10-11 17:48:26,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:48:26,758 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-11 17:48:26,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:48:26,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-11 17:48:26,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2024-10-11 17:48:26,760 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:48:26,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:48:26,936 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2024-10-11 17:48:26,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-11 17:48:26,937 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-10-11 17:48:26,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:48:26,937 INFO L225 Difference]: With dead ends: 39 [2024-10-11 17:48:26,937 INFO L226 Difference]: Without dead ends: 39 [2024-10-11 17:48:26,938 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2024-10-11 17:48:26,938 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 20 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 17:48:26,939 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 99 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 17:48:26,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-10-11 17:48:26,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2024-10-11 17:48:26,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 28 states have (on average 1.6071428571428572) internal successors, (45), 37 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:48:26,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2024-10-11 17:48:26,948 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 8 [2024-10-11 17:48:26,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:48:26,948 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2024-10-11 17:48:26,948 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:48:26,951 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2024-10-11 17:48:26,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-10-11 17:48:26,951 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:48:26,951 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:48:26,969 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-11 17:48:27,152 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:48:27,152 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-10-11 17:48:27,153 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:48:27,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1187426628, now seen corresponding path program 1 times [2024-10-11 17:48:27,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:48:27,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553297944] [2024-10-11 17:48:27,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:48:27,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:48:27,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:48:27,209 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 17:48:27,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:48:27,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553297944] [2024-10-11 17:48:27,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553297944] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 17:48:27,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 17:48:27,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 17:48:27,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19736227] [2024-10-11 17:48:27,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 17:48:27,211 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 17:48:27,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:48:27,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 17:48:27,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 17:48:27,213 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 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) [2024-10-11 17:48:27,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:48:27,238 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2024-10-11 17:48:27,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 17:48:27,238 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 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 [2024-10-11 17:48:27,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:48:27,239 INFO L225 Difference]: With dead ends: 36 [2024-10-11 17:48:27,239 INFO L226 Difference]: Without dead ends: 36 [2024-10-11 17:48:27,239 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 17:48:27,243 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 5 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 17:48:27,243 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 42 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 17:48:27,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-10-11 17:48:27,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2024-10-11 17:48:27,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 35 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) [2024-10-11 17:48:27,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2024-10-11 17:48:27,247 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 10 [2024-10-11 17:48:27,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:48:27,247 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2024-10-11 17:48:27,247 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 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) [2024-10-11 17:48:27,249 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2024-10-11 17:48:27,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-10-11 17:48:27,250 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:48:27,251 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:48:27,251 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-11 17:48:27,251 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-10-11 17:48:27,252 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:48:27,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1187426629, now seen corresponding path program 1 times [2024-10-11 17:48:27,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:48:27,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543242862] [2024-10-11 17:48:27,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:48:27,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:48:27,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:48:27,406 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 17:48:27,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:48:27,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543242862] [2024-10-11 17:48:27,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543242862] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 17:48:27,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 17:48:27,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-11 17:48:27,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989164866] [2024-10-11 17:48:27,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 17:48:27,407 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-11 17:48:27,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:48:27,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-11 17:48:27,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-10-11 17:48:27,408 INFO L87 Difference]: Start difference. First operand 36 states and 43 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) [2024-10-11 17:48:27,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:48:27,472 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2024-10-11 17:48:27,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 17:48:27,472 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 [2024-10-11 17:48:27,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:48:27,473 INFO L225 Difference]: With dead ends: 54 [2024-10-11 17:48:27,473 INFO L226 Difference]: Without dead ends: 54 [2024-10-11 17:48:27,473 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-10-11 17:48:27,474 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 18 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 17:48:27,476 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 72 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 17:48:27,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-10-11 17:48:27,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2024-10-11 17:48:27,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 44 states have (on average 1.4318181818181819) internal successors, (63), 51 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:48:27,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 63 transitions. [2024-10-11 17:48:27,483 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 63 transitions. Word has length 10 [2024-10-11 17:48:27,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:48:27,486 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 63 transitions. [2024-10-11 17:48:27,486 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) [2024-10-11 17:48:27,486 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 63 transitions. [2024-10-11 17:48:27,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-10-11 17:48:27,487 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:48:27,487 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:48:27,487 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-11 17:48:27,487 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-10-11 17:48:27,487 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:48:27,488 INFO L85 PathProgramCache]: Analyzing trace with hash 378080003, now seen corresponding path program 1 times [2024-10-11 17:48:27,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:48:27,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565240187] [2024-10-11 17:48:27,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:48:27,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:48:27,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:48:27,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 17:48:27,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:48:27,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565240187] [2024-10-11 17:48:27,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565240187] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 17:48:27,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 17:48:27,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-11 17:48:27,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807376879] [2024-10-11 17:48:27,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 17:48:27,641 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-11 17:48:27,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:48:27,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-11 17:48:27,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-10-11 17:48:27,643 INFO L87 Difference]: Start difference. First operand 52 states and 63 transitions. Second operand has 7 states, 6 states have (on average 1.6666666666666667) 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) [2024-10-11 17:48:27,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:48:27,712 INFO L93 Difference]: Finished difference Result 54 states and 65 transitions. [2024-10-11 17:48:27,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 17:48:27,712 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.6666666666666667) 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 [2024-10-11 17:48:27,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:48:27,713 INFO L225 Difference]: With dead ends: 54 [2024-10-11 17:48:27,713 INFO L226 Difference]: Without dead ends: 54 [2024-10-11 17:48:27,713 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2024-10-11 17:48:27,714 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 32 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 17:48:27,714 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 57 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 17:48:27,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-10-11 17:48:27,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2024-10-11 17:48:27,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 46 states have (on average 1.4130434782608696) internal successors, (65), 53 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:48:27,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2024-10-11 17:48:27,718 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 10 [2024-10-11 17:48:27,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:48:27,718 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2024-10-11 17:48:27,718 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.6666666666666667) 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) [2024-10-11 17:48:27,719 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2024-10-11 17:48:27,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-10-11 17:48:27,720 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:48:27,720 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:48:27,720 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-11 17:48:27,722 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-10-11 17:48:27,723 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:48:27,723 INFO L85 PathProgramCache]: Analyzing trace with hash -1344245526, now seen corresponding path program 1 times [2024-10-11 17:48:27,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:48:27,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265469313] [2024-10-11 17:48:27,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:48:27,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:48:27,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:48:27,778 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 17:48:27,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:48:27,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265469313] [2024-10-11 17:48:27,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265469313] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:48:27,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245080717] [2024-10-11 17:48:27,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:48:27,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:48:27,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:48:27,782 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:48:27,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-11 17:48:27,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:48:27,844 INFO L255 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-11 17:48:27,845 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:48:27,879 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 17:48:27,880 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 17:48:27,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245080717] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 17:48:27,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-11 17:48:27,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2024-10-11 17:48:27,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988580115] [2024-10-11 17:48:27,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 17:48:27,882 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 17:48:27,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:48:27,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 17:48:27,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-10-11 17:48:27,883 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:48:27,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:48:27,923 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2024-10-11 17:48:27,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 17:48:27,923 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-10-11 17:48:27,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:48:27,924 INFO L225 Difference]: With dead ends: 54 [2024-10-11 17:48:27,924 INFO L226 Difference]: Without dead ends: 54 [2024-10-11 17:48:27,924 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-10-11 17:48:27,925 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 4 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 17:48:27,925 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 72 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 17:48:27,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-10-11 17:48:27,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2024-10-11 17:48:27,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 45 states have (on average 1.3777777777777778) internal successors, (62), 52 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) [2024-10-11 17:48:27,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2024-10-11 17:48:27,932 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 12 [2024-10-11 17:48:27,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:48:27,933 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2024-10-11 17:48:27,933 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:48:27,933 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2024-10-11 17:48:27,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-10-11 17:48:27,934 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:48:27,934 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:48:27,951 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-11 17:48:28,137 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:48:28,138 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-10-11 17:48:28,138 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:48:28,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1737272536, now seen corresponding path program 1 times [2024-10-11 17:48:28,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:48:28,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70150500] [2024-10-11 17:48:28,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:48:28,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:48:28,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:48:28,326 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 17:48:28,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:48:28,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70150500] [2024-10-11 17:48:28,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70150500] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:48:28,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676568539] [2024-10-11 17:48:28,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:48:28,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:48:28,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:48:28,329 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:48:28,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-11 17:48:28,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:48:28,390 INFO L255 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-11 17:48:28,392 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:48:28,422 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 [2024-10-11 17:48:28,431 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 8 treesize of output 1 [2024-10-11 17:48:28,592 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 17:48:28,592 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:48:28,801 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 17:48:28,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676568539] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:48:28,801 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:48:28,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2024-10-11 17:48:28,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297397257] [2024-10-11 17:48:28,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:48:28,802 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-11 17:48:28,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:48:28,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-11 17:48:28,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2024-10-11 17:48:28,803 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand has 17 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:48:28,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:48:28,974 INFO L93 Difference]: Finished difference Result 52 states and 61 transitions. [2024-10-11 17:48:28,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-11 17:48:28,975 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-10-11 17:48:28,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:48:28,975 INFO L225 Difference]: With dead ends: 52 [2024-10-11 17:48:28,975 INFO L226 Difference]: Without dead ends: 52 [2024-10-11 17:48:28,976 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=288, Unknown=0, NotChecked=0, Total=420 [2024-10-11 17:48:28,976 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 28 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 17:48:28,977 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 142 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 17:48:28,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-10-11 17:48:28,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2024-10-11 17:48:28,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 44 states have (on average 1.3636363636363635) 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) [2024-10-11 17:48:28,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 60 transitions. [2024-10-11 17:48:28,980 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 60 transitions. Word has length 12 [2024-10-11 17:48:28,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:48:28,980 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 60 transitions. [2024-10-11 17:48:28,980 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:48:28,981 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 60 transitions. [2024-10-11 17:48:28,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-10-11 17:48:28,981 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:48:28,981 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:48:28,998 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-11 17:48:29,181 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-10-11 17:48:29,183 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-10-11 17:48:29,184 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:48:29,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1278060003, now seen corresponding path program 1 times [2024-10-11 17:48:29,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:48:29,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564877644] [2024-10-11 17:48:29,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:48:29,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:48:29,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:48:29,267 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 17:48:29,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:48:29,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564877644] [2024-10-11 17:48:29,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564877644] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:48:29,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305570567] [2024-10-11 17:48:29,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:48:29,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:48:29,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:48:29,270 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:48:29,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-11 17:48:29,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:48:29,328 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-11 17:48:29,329 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:48:29,397 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 17:48:29,398 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:48:29,437 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-10-11 17:48:29,475 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 17:48:29,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305570567] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:48:29,476 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:48:29,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2024-10-11 17:48:29,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61853635] [2024-10-11 17:48:29,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:48:29,478 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-11 17:48:29,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:48:29,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-11 17:48:29,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-10-11 17:48:29,479 INFO L87 Difference]: Start difference. First operand 51 states and 60 transitions. Second operand has 9 states, 8 states have (on average 4.125) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:48:29,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:48:29,557 INFO L93 Difference]: Finished difference Result 63 states and 73 transitions. [2024-10-11 17:48:29,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 17:48:29,557 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.125) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-10-11 17:48:29,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:48:29,558 INFO L225 Difference]: With dead ends: 63 [2024-10-11 17:48:29,559 INFO L226 Difference]: Without dead ends: 63 [2024-10-11 17:48:29,559 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2024-10-11 17:48:29,560 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 3 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 17:48:29,560 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 111 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 17:48:29,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-10-11 17:48:29,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2024-10-11 17:48:29,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 56 states have (on average 1.3035714285714286) internal successors, (73), 62 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:48:29,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 73 transitions. [2024-10-11 17:48:29,567 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 73 transitions. Word has length 13 [2024-10-11 17:48:29,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:48:29,567 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 73 transitions. [2024-10-11 17:48:29,567 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.125) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:48:29,567 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 73 transitions. [2024-10-11 17:48:29,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-10-11 17:48:29,568 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:48:29,568 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:48:29,588 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-11 17:48:29,768 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-10-11 17:48:29,769 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-10-11 17:48:29,769 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:48:29,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1536225441, now seen corresponding path program 1 times [2024-10-11 17:48:29,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:48:29,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090224903] [2024-10-11 17:48:29,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:48:29,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:48:29,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:48:29,857 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 17:48:29,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:48:29,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090224903] [2024-10-11 17:48:29,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090224903] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 17:48:29,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 17:48:29,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-11 17:48:29,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677207374] [2024-10-11 17:48:29,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 17:48:29,859 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-11 17:48:29,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:48:29,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-11 17:48:29,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-10-11 17:48:29,859 INFO L87 Difference]: Start difference. First operand 63 states and 73 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) [2024-10-11 17:48:29,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:48:29,886 INFO L93 Difference]: Finished difference Result 62 states and 71 transitions. [2024-10-11 17:48:29,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 17:48:29,886 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 [2024-10-11 17:48:29,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:48:29,887 INFO L225 Difference]: With dead ends: 62 [2024-10-11 17:48:29,887 INFO L226 Difference]: Without dead ends: 62 [2024-10-11 17:48:29,887 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-10-11 17:48:29,887 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 2 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 17:48:29,888 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 61 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 17:48:29,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-10-11 17:48:29,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 50. [2024-10-11 17:48:29,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 44 states have (on average 1.3181818181818181) internal successors, (58), 49 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) [2024-10-11 17:48:29,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2024-10-11 17:48:29,895 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 13 [2024-10-11 17:48:29,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:48:29,895 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2024-10-11 17:48:29,895 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) [2024-10-11 17:48:29,895 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2024-10-11 17:48:29,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-10-11 17:48:29,896 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:48:29,896 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:48:29,896 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-10-11 17:48:29,896 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-10-11 17:48:29,896 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:48:29,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1223319862, now seen corresponding path program 1 times [2024-10-11 17:48:29,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:48:29,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356545837] [2024-10-11 17:48:29,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:48:29,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:48:29,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:48:29,975 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 17:48:29,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:48:29,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356545837] [2024-10-11 17:48:29,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356545837] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 17:48:29,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 17:48:29,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-11 17:48:29,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941311647] [2024-10-11 17:48:29,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 17:48:29,976 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-11 17:48:29,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:48:29,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-11 17:48:29,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-10-11 17:48:29,977 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:48:30,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:48:30,009 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2024-10-11 17:48:30,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 17:48:30,010 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-10-11 17:48:30,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:48:30,011 INFO L225 Difference]: With dead ends: 50 [2024-10-11 17:48:30,011 INFO L226 Difference]: Without dead ends: 50 [2024-10-11 17:48:30,011 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-10-11 17:48:30,012 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 1 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 17:48:30,012 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 60 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 17:48:30,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-10-11 17:48:30,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2024-10-11 17:48:30,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.3170731707317074) 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) [2024-10-11 17:48:30,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2024-10-11 17:48:30,014 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 14 [2024-10-11 17:48:30,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:48:30,015 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2024-10-11 17:48:30,015 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:48:30,015 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2024-10-11 17:48:30,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-10-11 17:48:30,016 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:48:30,016 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:48:30,016 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-10-11 17:48:30,016 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-10-11 17:48:30,016 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:48:30,017 INFO L85 PathProgramCache]: Analyzing trace with hash -199478638, now seen corresponding path program 1 times [2024-10-11 17:48:30,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:48:30,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72295565] [2024-10-11 17:48:30,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:48:30,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:48:30,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:48:30,071 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 17:48:30,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:48:30,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72295565] [2024-10-11 17:48:30,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72295565] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 17:48:30,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 17:48:30,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-11 17:48:30,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436649495] [2024-10-11 17:48:30,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 17:48:30,072 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 17:48:30,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:48:30,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 17:48:30,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-11 17:48:30,073 INFO L87 Difference]: Start difference. First operand 46 states and 54 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) [2024-10-11 17:48:30,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:48:30,112 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2024-10-11 17:48:30,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 17:48:30,113 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 [2024-10-11 17:48:30,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:48:30,113 INFO L225 Difference]: With dead ends: 46 [2024-10-11 17:48:30,113 INFO L226 Difference]: Without dead ends: 46 [2024-10-11 17:48:30,113 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 [2024-10-11 17:48:30,114 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 13 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 58 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 [2024-10-11 17:48:30,114 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 58 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 17:48:30,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-10-11 17:48:30,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2024-10-11 17:48:30,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 44 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:48:30,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2024-10-11 17:48:30,116 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 16 [2024-10-11 17:48:30,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:48:30,117 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2024-10-11 17:48:30,117 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) [2024-10-11 17:48:30,117 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2024-10-11 17:48:30,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-10-11 17:48:30,117 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:48:30,117 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:48:30,118 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-10-11 17:48:30,118 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-10-11 17:48:30,118 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:48:30,118 INFO L85 PathProgramCache]: Analyzing trace with hash -199478637, now seen corresponding path program 1 times [2024-10-11 17:48:30,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:48:30,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549252865] [2024-10-11 17:48:30,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:48:30,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:48:30,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:48:30,242 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 17:48:30,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:48:30,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549252865] [2024-10-11 17:48:30,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549252865] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:48:30,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452423158] [2024-10-11 17:48:30,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:48:30,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:48:30,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:48:30,245 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:48:30,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-11 17:48:30,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:48:30,333 INFO L255 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-10-11 17:48:30,336 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:48:30,379 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-10-11 17:48:30,379 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 1 case distinctions, treesize of input 9 treesize of output 11 [2024-10-11 17:48:30,573 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 17:48:30,574 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:48:30,775 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 17:48:30,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452423158] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-11 17:48:30,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-10-11 17:48:30,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5, 8] total 19 [2024-10-11 17:48:30,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718335631] [2024-10-11 17:48:30,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 17:48:30,776 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-11 17:48:30,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:48:30,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-11 17:48:30,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2024-10-11 17:48:30,777 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand has 9 states, 8 states have (on average 2.0) internal successors, (16), 9 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) [2024-10-11 17:48:30,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:48:30,863 INFO L93 Difference]: Finished difference Result 58 states and 67 transitions. [2024-10-11 17:48:30,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-11 17:48:30,863 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 9 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 [2024-10-11 17:48:30,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:48:30,864 INFO L225 Difference]: With dead ends: 58 [2024-10-11 17:48:30,864 INFO L226 Difference]: Without dead ends: 58 [2024-10-11 17:48:30,864 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2024-10-11 17:48:30,865 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 21 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 17:48:30,865 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 126 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 17:48:30,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-10-11 17:48:30,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2024-10-11 17:48:30,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 54 states have (on average 1.2407407407407407) internal successors, (67), 57 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) [2024-10-11 17:48:30,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 67 transitions. [2024-10-11 17:48:30,867 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 67 transitions. Word has length 16 [2024-10-11 17:48:30,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:48:30,868 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 67 transitions. [2024-10-11 17:48:30,868 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 9 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) [2024-10-11 17:48:30,868 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 67 transitions. [2024-10-11 17:48:30,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-10-11 17:48:30,868 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:48:30,868 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:48:30,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-10-11 17:48:31,069 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-10-11 17:48:31,069 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-10-11 17:48:31,070 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:48:31,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1479342315, now seen corresponding path program 1 times [2024-10-11 17:48:31,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:48:31,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023068310] [2024-10-11 17:48:31,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:48:31,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:48:31,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:48:31,181 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 17:48:31,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:48:31,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023068310] [2024-10-11 17:48:31,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023068310] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:48:31,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118886045] [2024-10-11 17:48:31,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:48:31,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:48:31,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:48:31,183 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:48:31,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-11 17:48:31,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:48:31,253 INFO L255 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-11 17:48:31,254 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:48:31,342 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 17:48:31,342 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:48:31,388 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2024-10-11 17:48:31,399 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 17:48:31,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118886045] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:48:31,399 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:48:31,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2024-10-11 17:48:31,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412767474] [2024-10-11 17:48:31,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:48:31,400 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-11 17:48:31,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:48:31,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-11 17:48:31,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-10-11 17:48:31,401 INFO L87 Difference]: Start difference. First operand 58 states and 67 transitions. Second operand has 10 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:48:31,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:48:31,480 INFO L93 Difference]: Finished difference Result 62 states and 71 transitions. [2024-10-11 17:48:31,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-11 17:48:31,481 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2024-10-11 17:48:31,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:48:31,481 INFO L225 Difference]: With dead ends: 62 [2024-10-11 17:48:31,481 INFO L226 Difference]: Without dead ends: 62 [2024-10-11 17:48:31,482 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-10-11 17:48:31,482 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 2 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 17:48:31,482 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 141 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 17:48:31,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-10-11 17:48:31,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 47. [2024-10-11 17:48:31,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 43 states have (on average 1.2790697674418605) 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) [2024-10-11 17:48:31,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2024-10-11 17:48:31,487 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 16 [2024-10-11 17:48:31,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:48:31,488 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2024-10-11 17:48:31,488 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:48:31,488 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2024-10-11 17:48:31,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-10-11 17:48:31,488 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:48:31,488 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:48:31,506 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-11 17:48:31,689 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:48:31,689 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-10-11 17:48:31,690 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:48:31,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1568104809, now seen corresponding path program 1 times [2024-10-11 17:48:31,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:48:31,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825702932] [2024-10-11 17:48:31,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:48:31,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:48:31,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:48:31,795 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 17:48:31,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:48:31,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825702932] [2024-10-11 17:48:31,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825702932] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 17:48:31,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 17:48:31,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-11 17:48:31,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813176702] [2024-10-11 17:48:31,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 17:48:31,797 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-11 17:48:31,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:48:31,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-11 17:48:31,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-10-11 17:48:31,799 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:48:31,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:48:31,853 INFO L93 Difference]: Finished difference Result 49 states and 58 transitions. [2024-10-11 17:48:31,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 17:48:31,854 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2024-10-11 17:48:31,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:48:31,854 INFO L225 Difference]: With dead ends: 49 [2024-10-11 17:48:31,854 INFO L226 Difference]: Without dead ends: 49 [2024-10-11 17:48:31,855 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-10-11 17:48:31,855 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 27 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 17:48:31,856 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 80 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 17:48:31,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-10-11 17:48:31,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2024-10-11 17:48:31,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 43 states have (on average 1.255813953488372) 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) [2024-10-11 17:48:31,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2024-10-11 17:48:31,858 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 19 [2024-10-11 17:48:31,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:48:31,858 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2024-10-11 17:48:31,858 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:48:31,858 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2024-10-11 17:48:31,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-10-11 17:48:31,859 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:48:31,859 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:48:31,859 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-10-11 17:48:31,859 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-10-11 17:48:31,860 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:48:31,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1568104810, now seen corresponding path program 1 times [2024-10-11 17:48:31,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:48:31,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278340628] [2024-10-11 17:48:31,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:48:31,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:48:31,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:48:31,998 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 17:48:31,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:48:31,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278340628] [2024-10-11 17:48:31,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278340628] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:48:31,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417251213] [2024-10-11 17:48:31,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:48:31,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:48:32,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:48:32,001 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:48:32,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-11 17:48:32,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:48:32,078 INFO L255 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-11 17:48:32,079 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:48:32,190 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 17:48:32,191 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:48:32,237 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2024-10-11 17:48:32,257 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 17:48:32,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417251213] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:48:32,258 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:48:32,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-10-11 17:48:32,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719242808] [2024-10-11 17:48:32,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:48:32,259 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-11 17:48:32,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:48:32,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-11 17:48:32,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2024-10-11 17:48:32,260 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand has 14 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:48:32,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:48:32,391 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2024-10-11 17:48:32,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-11 17:48:32,392 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2024-10-11 17:48:32,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:48:32,393 INFO L225 Difference]: With dead ends: 49 [2024-10-11 17:48:32,393 INFO L226 Difference]: Without dead ends: 49 [2024-10-11 17:48:32,393 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2024-10-11 17:48:32,394 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 28 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 17:48:32,394 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 134 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 17:48:32,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-10-11 17:48:32,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2024-10-11 17:48:32,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 45 states have (on average 1.2444444444444445) internal successors, (56), 47 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:48:32,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2024-10-11 17:48:32,396 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 19 [2024-10-11 17:48:32,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:48:32,396 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2024-10-11 17:48:32,397 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:48:32,397 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2024-10-11 17:48:32,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-10-11 17:48:32,397 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:48:32,397 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] [2024-10-11 17:48:32,415 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-11 17:48:32,598 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-10-11 17:48:32,598 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-10-11 17:48:32,599 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:48:32,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1366571167, now seen corresponding path program 1 times [2024-10-11 17:48:32,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:48:32,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385890371] [2024-10-11 17:48:32,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:48:32,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:48:32,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:48:32,714 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 17:48:32,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:48:32,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385890371] [2024-10-11 17:48:32,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385890371] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 17:48:32,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 17:48:32,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 17:48:32,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949470834] [2024-10-11 17:48:32,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 17:48:32,715 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 17:48:32,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:48:32,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 17:48:32,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 17:48:32,716 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:48:32,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:48:32,736 INFO L93 Difference]: Finished difference Result 47 states and 55 transitions. [2024-10-11 17:48:32,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 17:48:32,736 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 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 [2024-10-11 17:48:32,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:48:32,737 INFO L225 Difference]: With dead ends: 47 [2024-10-11 17:48:32,737 INFO L226 Difference]: Without dead ends: 44 [2024-10-11 17:48:32,737 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 17:48:32,738 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 11 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 17:48:32,738 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 42 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 17:48:32,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-10-11 17:48:32,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2024-10-11 17:48:32,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 42 states have (on average 1.2142857142857142) internal successors, (51), 43 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) [2024-10-11 17:48:32,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2024-10-11 17:48:32,740 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 20 [2024-10-11 17:48:32,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:48:32,740 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2024-10-11 17:48:32,740 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:48:32,740 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2024-10-11 17:48:32,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-10-11 17:48:32,741 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:48:32,741 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:48:32,741 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-10-11 17:48:32,741 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-10-11 17:48:32,742 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:48:32,742 INFO L85 PathProgramCache]: Analyzing trace with hash -947967952, now seen corresponding path program 1 times [2024-10-11 17:48:32,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:48:32,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992510954] [2024-10-11 17:48:32,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:48:32,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:48:32,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:48:32,971 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 17:48:32,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:48:32,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992510954] [2024-10-11 17:48:32,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992510954] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:48:32,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226845416] [2024-10-11 17:48:32,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:48:32,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:48:32,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:48:32,974 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:48:32,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-11 17:48:33,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:48:33,058 INFO L255 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-11 17:48:33,060 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:48:33,078 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-11 17:48:33,099 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 17:48:33,099 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 17:48:33,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226845416] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 17:48:33,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-11 17:48:33,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 10 [2024-10-11 17:48:33,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291097723] [2024-10-11 17:48:33,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 17:48:33,100 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-11 17:48:33,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:48:33,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-11 17:48:33,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-10-11 17:48:33,101 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:48:33,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:48:33,147 INFO L93 Difference]: Finished difference Result 58 states and 65 transitions. [2024-10-11 17:48:33,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-11 17:48:33,147 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 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 [2024-10-11 17:48:33,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:48:33,148 INFO L225 Difference]: With dead ends: 58 [2024-10-11 17:48:33,149 INFO L226 Difference]: Without dead ends: 35 [2024-10-11 17:48:33,149 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-10-11 17:48:33,149 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 1 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 17:48:33,150 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 84 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 17:48:33,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-10-11 17:48:33,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2024-10-11 17:48:33,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:48:33,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2024-10-11 17:48:33,155 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 22 [2024-10-11 17:48:33,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:48:33,155 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2024-10-11 17:48:33,155 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:48:33,155 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2024-10-11 17:48:33,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-10-11 17:48:33,156 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:48:33,156 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:48:33,175 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-11 17:48:33,356 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:48:33,357 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-10-11 17:48:33,358 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:48:33,358 INFO L85 PathProgramCache]: Analyzing trace with hash -525266126, now seen corresponding path program 1 times [2024-10-11 17:48:33,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:48:33,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879899999] [2024-10-11 17:48:33,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:48:33,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:48:33,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:48:33,605 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 17:48:33,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:48:33,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879899999] [2024-10-11 17:48:33,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879899999] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:48:33,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014019015] [2024-10-11 17:48:33,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:48:33,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:48:33,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:48:33,607 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:48:33,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-11 17:48:33,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:48:33,685 INFO L255 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-11 17:48:33,688 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:48:33,746 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-11 17:48:33,766 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 17:48:33,766 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:48:33,779 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2024-10-11 17:48:33,781 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2024-10-11 17:48:33,842 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 17:48:33,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014019015] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:48:33,843 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:48:33,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 16 [2024-10-11 17:48:33,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441103826] [2024-10-11 17:48:33,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:48:33,843 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-11 17:48:33,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:48:33,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-11 17:48:33,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2024-10-11 17:48:33,844 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:48:33,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:48:33,969 INFO L93 Difference]: Finished difference Result 55 states and 62 transitions. [2024-10-11 17:48:33,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-11 17:48:33,970 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-10-11 17:48:33,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:48:33,970 INFO L225 Difference]: With dead ends: 55 [2024-10-11 17:48:33,970 INFO L226 Difference]: Without dead ends: 41 [2024-10-11 17:48:33,971 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2024-10-11 17:48:33,971 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 13 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 17:48:33,972 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 117 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 17:48:33,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-10-11 17:48:33,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2024-10-11 17:48:33,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 38 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:48:33,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2024-10-11 17:48:33,975 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 22 [2024-10-11 17:48:33,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:48:33,975 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2024-10-11 17:48:33,976 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:48:33,976 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2024-10-11 17:48:33,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-10-11 17:48:33,978 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:48:33,978 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] [2024-10-11 17:48:33,996 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-10-11 17:48:34,179 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-10-11 17:48:34,180 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-10-11 17:48:34,180 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:48:34,180 INFO L85 PathProgramCache]: Analyzing trace with hash -632690582, now seen corresponding path program 2 times [2024-10-11 17:48:34,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:48:34,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491279371] [2024-10-11 17:48:34,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:48:34,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:48:34,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:48:34,373 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 17:48:34,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:48:34,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491279371] [2024-10-11 17:48:34,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491279371] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:48:34,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274032249] [2024-10-11 17:48:34,374 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 17:48:34,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:48:34,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:48:34,376 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:48:34,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-11 17:48:34,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 17:48:34,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 17:48:34,461 INFO L255 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-10-11 17:48:34,462 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:48:34,592 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 17:48:34,592 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:48:34,697 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 21 treesize of output 17 [2024-10-11 17:48:34,789 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 17:48:34,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274032249] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:48:34,790 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:48:34,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2024-10-11 17:48:34,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861151610] [2024-10-11 17:48:34,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:48:34,791 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-11 17:48:34,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:48:34,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-11 17:48:34,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2024-10-11 17:48:34,792 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand has 21 states, 20 states have (on average 3.0) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:48:34,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:48:34,946 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2024-10-11 17:48:34,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-11 17:48:34,948 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.0) internal successors, (60), 21 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) Word has length 24 [2024-10-11 17:48:34,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:48:34,949 INFO L225 Difference]: With dead ends: 51 [2024-10-11 17:48:34,949 INFO L226 Difference]: Without dead ends: 51 [2024-10-11 17:48:34,949 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2024-10-11 17:48:34,950 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 5 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 17:48:34,950 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 128 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 17:48:34,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-10-11 17:48:34,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2024-10-11 17:48:34,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 46 states have (on average 1.1956521739130435) internal successors, (55), 47 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:48:34,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2024-10-11 17:48:34,951 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 24 [2024-10-11 17:48:34,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:48:34,952 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2024-10-11 17:48:34,952 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.0) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:48:34,952 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2024-10-11 17:48:34,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-10-11 17:48:34,953 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:48:34,953 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] [2024-10-11 17:48:34,970 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-10-11 17:48:35,157 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-10-11 17:48:35,158 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-10-11 17:48:35,158 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:48:35,158 INFO L85 PathProgramCache]: Analyzing trace with hash 1861514356, now seen corresponding path program 1 times [2024-10-11 17:48:35,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:48:35,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165901502] [2024-10-11 17:48:35,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:48:35,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:48:35,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:48:35,373 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 17:48:35,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:48:35,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165901502] [2024-10-11 17:48:35,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165901502] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:48:35,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418810404] [2024-10-11 17:48:35,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:48:35,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:48:35,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:48:35,376 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:48:35,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-11 17:48:35,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:48:35,461 INFO L255 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-10-11 17:48:35,463 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:48:35,495 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-11 17:48:35,506 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-11 17:48:35,507 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 17:48:35,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418810404] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 17:48:35,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-11 17:48:35,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 12 [2024-10-11 17:48:35,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447633857] [2024-10-11 17:48:35,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 17:48:35,509 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-11 17:48:35,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:48:35,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-11 17:48:35,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2024-10-11 17:48:35,511 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:48:35,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:48:35,575 INFO L93 Difference]: Finished difference Result 66 states and 73 transitions. [2024-10-11 17:48:35,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-11 17:48:35,576 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2024-10-11 17:48:35,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:48:35,576 INFO L225 Difference]: With dead ends: 66 [2024-10-11 17:48:35,576 INFO L226 Difference]: Without dead ends: 66 [2024-10-11 17:48:35,577 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2024-10-11 17:48:35,577 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 5 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 17:48:35,578 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 74 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 17:48:35,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-10-11 17:48:35,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2024-10-11 17:48:35,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 63 states have (on average 1.1587301587301588) internal successors, (73), 64 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:48:35,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 73 transitions. [2024-10-11 17:48:35,582 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 73 transitions. Word has length 25 [2024-10-11 17:48:35,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:48:35,582 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 73 transitions. [2024-10-11 17:48:35,582 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:48:35,582 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 73 transitions. [2024-10-11 17:48:35,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-10-11 17:48:35,583 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:48:35,583 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] [2024-10-11 17:48:35,601 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-10-11 17:48:35,783 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,13 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:48:35,784 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-10-11 17:48:35,784 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:48:35,784 INFO L85 PathProgramCache]: Analyzing trace with hash 56076022, now seen corresponding path program 1 times [2024-10-11 17:48:35,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:48:35,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025720679] [2024-10-11 17:48:35,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:48:35,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:48:35,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:48:36,045 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 17:48:36,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:48:36,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025720679] [2024-10-11 17:48:36,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025720679] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:48:36,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356518678] [2024-10-11 17:48:36,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:48:36,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:48:36,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:48:36,048 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:48:36,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-11 17:48:36,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:48:36,131 INFO L255 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-10-11 17:48:36,133 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:48:36,201 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-11 17:48:36,213 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 17:48:36,214 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:48:36,227 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2024-10-11 17:48:36,229 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2024-10-11 17:48:36,291 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 17:48:36,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356518678] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:48:36,291 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:48:36,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 17 [2024-10-11 17:48:36,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841423563] [2024-10-11 17:48:36,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:48:36,292 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-11 17:48:36,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:48:36,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-11 17:48:36,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2024-10-11 17:48:36,293 INFO L87 Difference]: Start difference. First operand 65 states and 73 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:48:36,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:48:36,498 INFO L93 Difference]: Finished difference Result 86 states and 95 transitions. [2024-10-11 17:48:36,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-11 17:48:36,498 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2024-10-11 17:48:36,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:48:36,499 INFO L225 Difference]: With dead ends: 86 [2024-10-11 17:48:36,499 INFO L226 Difference]: Without dead ends: 86 [2024-10-11 17:48:36,499 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2024-10-11 17:48:36,499 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 43 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 17:48:36,500 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 107 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 17:48:36,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2024-10-11 17:48:36,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 67. [2024-10-11 17:48:36,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 65 states have (on average 1.1692307692307693) internal successors, (76), 66 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) [2024-10-11 17:48:36,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 76 transitions. [2024-10-11 17:48:36,502 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 76 transitions. Word has length 25 [2024-10-11 17:48:36,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:48:36,504 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 76 transitions. [2024-10-11 17:48:36,504 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:48:36,504 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 76 transitions. [2024-10-11 17:48:36,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-10-11 17:48:36,505 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:48:36,505 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] [2024-10-11 17:48:36,522 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-10-11 17:48:36,706 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,14 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:48:36,707 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-10-11 17:48:36,707 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:48:36,707 INFO L85 PathProgramCache]: Analyzing trace with hash -33097359, now seen corresponding path program 2 times [2024-10-11 17:48:36,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:48:36,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033974597] [2024-10-11 17:48:36,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:48:36,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:48:36,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:48:36,981 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 17:48:36,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:48:36,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033974597] [2024-10-11 17:48:36,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033974597] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:48:36,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106318992] [2024-10-11 17:48:36,982 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 17:48:36,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:48:36,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:48:36,984 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:48:36,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-11 17:48:37,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 17:48:37,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 17:48:37,075 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-10-11 17:48:37,077 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:48:37,182 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 17:48:37,183 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:48:37,332 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 [2024-10-11 17:48:37,376 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 17:48:37,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106318992] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:48:37,376 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:48:37,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2024-10-11 17:48:37,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587364562] [2024-10-11 17:48:37,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:48:37,377 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-11 17:48:37,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:48:37,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-11 17:48:37,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2024-10-11 17:48:37,378 INFO L87 Difference]: Start difference. First operand 67 states and 76 transitions. Second operand has 22 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:48:37,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:48:37,673 INFO L93 Difference]: Finished difference Result 83 states and 93 transitions. [2024-10-11 17:48:37,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-11 17:48:37,673 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2024-10-11 17:48:37,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:48:37,674 INFO L225 Difference]: With dead ends: 83 [2024-10-11 17:48:37,674 INFO L226 Difference]: Without dead ends: 83 [2024-10-11 17:48:37,674 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=689, Unknown=0, NotChecked=0, Total=812 [2024-10-11 17:48:37,675 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 56 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-11 17:48:37,675 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 183 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-11 17:48:37,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2024-10-11 17:48:37,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 75. [2024-10-11 17:48:37,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 73 states have (on average 1.178082191780822) internal successors, (86), 74 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:48:37,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 86 transitions. [2024-10-11 17:48:37,677 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 86 transitions. Word has length 27 [2024-10-11 17:48:37,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:48:37,678 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 86 transitions. [2024-10-11 17:48:37,678 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:48:37,678 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 86 transitions. [2024-10-11 17:48:37,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-10-11 17:48:37,678 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:48:37,678 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:48:37,692 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-10-11 17:48:37,879 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-10-11 17:48:37,879 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-10-11 17:48:37,880 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:48:37,880 INFO L85 PathProgramCache]: Analyzing trace with hash -852696889, now seen corresponding path program 3 times [2024-10-11 17:48:37,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:48:37,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376516799] [2024-10-11 17:48:37,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:48:37,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:48:37,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:48:38,287 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 17:48:38,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:48:38,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376516799] [2024-10-11 17:48:38,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376516799] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:48:38,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239466724] [2024-10-11 17:48:38,288 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 17:48:38,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:48:38,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:48:38,290 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:48:38,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-10-11 17:48:38,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-11 17:48:38,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 17:48:38,391 INFO L255 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-10-11 17:48:38,393 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:48:38,472 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 [2024-10-11 17:48:38,518 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 17:48:38,519 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:48:38,535 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 [2024-10-11 17:48:38,537 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 [2024-10-11 17:48:38,591 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 17:48:38,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239466724] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:48:38,592 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:48:38,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 22 [2024-10-11 17:48:38,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584052213] [2024-10-11 17:48:38,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:48:38,593 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-11 17:48:38,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:48:38,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-11 17:48:38,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2024-10-11 17:48:38,594 INFO L87 Difference]: Start difference. First operand 75 states and 86 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:48:38,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:48:38,794 INFO L93 Difference]: Finished difference Result 123 states and 138 transitions. [2024-10-11 17:48:38,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-11 17:48:38,794 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 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) Word has length 30 [2024-10-11 17:48:38,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:48:38,795 INFO L225 Difference]: With dead ends: 123 [2024-10-11 17:48:38,795 INFO L226 Difference]: Without dead ends: 104 [2024-10-11 17:48:38,796 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2024-10-11 17:48:38,796 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 5 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 17:48:38,798 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 189 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 17:48:38,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2024-10-11 17:48:38,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 101. [2024-10-11 17:48:38,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 99 states have (on average 1.1616161616161615) internal successors, (115), 100 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) [2024-10-11 17:48:38,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 115 transitions. [2024-10-11 17:48:38,805 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 115 transitions. Word has length 30 [2024-10-11 17:48:38,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:48:38,805 INFO L471 AbstractCegarLoop]: Abstraction has 101 states and 115 transitions. [2024-10-11 17:48:38,805 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:48:38,806 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 115 transitions. [2024-10-11 17:48:38,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-10-11 17:48:38,806 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:48:38,806 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:48:38,824 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-10-11 17:48:39,006 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-10-11 17:48:39,007 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-10-11 17:48:39,007 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:48:39,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1204644341, now seen corresponding path program 3 times [2024-10-11 17:48:39,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:48:39,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72573510] [2024-10-11 17:48:39,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:48:39,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:48:39,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:48:39,353 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 17:48:39,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:48:39,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72573510] [2024-10-11 17:48:39,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72573510] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:48:39,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537263297] [2024-10-11 17:48:39,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 17:48:39,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:48:39,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:48:39,356 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:48:39,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-10-11 17:48:39,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-11 17:48:39,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 17:48:39,459 INFO L255 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-10-11 17:48:39,460 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:48:39,538 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 [2024-10-11 17:48:39,614 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 17:48:39,614 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:48:39,632 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 [2024-10-11 17:48:39,634 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 [2024-10-11 17:48:39,684 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 17:48:39,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537263297] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:48:39,685 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:48:39,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 25 [2024-10-11 17:48:39,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570898810] [2024-10-11 17:48:39,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:48:39,686 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-10-11 17:48:39,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:48:39,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-10-11 17:48:39,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2024-10-11 17:48:39,686 INFO L87 Difference]: Start difference. First operand 101 states and 115 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:48:40,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:48:40,020 INFO L93 Difference]: Finished difference Result 152 states and 169 transitions. [2024-10-11 17:48:40,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-11 17:48:40,021 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2024-10-11 17:48:40,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:48:40,022 INFO L225 Difference]: With dead ends: 152 [2024-10-11 17:48:40,022 INFO L226 Difference]: Without dead ends: 139 [2024-10-11 17:48:40,023 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=149, Invalid=1041, Unknown=0, NotChecked=0, Total=1190 [2024-10-11 17:48:40,023 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 39 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-11 17:48:40,023 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 317 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-11 17:48:40,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2024-10-11 17:48:40,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 130. [2024-10-11 17:48:40,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 128 states have (on average 1.15625) internal successors, (148), 129 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:48:40,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 148 transitions. [2024-10-11 17:48:40,026 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 148 transitions. Word has length 31 [2024-10-11 17:48:40,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:48:40,026 INFO L471 AbstractCegarLoop]: Abstraction has 130 states and 148 transitions. [2024-10-11 17:48:40,027 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:48:40,027 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 148 transitions. [2024-10-11 17:48:40,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-10-11 17:48:40,027 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:48:40,027 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:48:40,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-10-11 17:48:40,228 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-10-11 17:48:40,228 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-10-11 17:48:40,229 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:48:40,229 INFO L85 PathProgramCache]: Analyzing trace with hash 236518911, now seen corresponding path program 4 times [2024-10-11 17:48:40,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:48:40,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311185171] [2024-10-11 17:48:40,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:48:40,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:48:40,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:48:40,464 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 17:48:40,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:48:40,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311185171] [2024-10-11 17:48:40,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311185171] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:48:40,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546266075] [2024-10-11 17:48:40,465 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-11 17:48:40,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:48:40,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:48:40,467 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:48:40,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-10-11 17:48:40,562 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-11 17:48:40,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 17:48:40,563 INFO L255 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-10-11 17:48:40,565 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:48:40,690 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 [2024-10-11 17:48:41,125 INFO L349 Elim1Store]: treesize reduction 4, result has 81.8 percent of original size [2024-10-11 17:48:41,126 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 28 [2024-10-11 17:48:41,206 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-11 17:48:41,206 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:48:41,640 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2024-10-11 17:48:41,644 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 39 [2024-10-11 17:48:41,889 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 [2024-10-11 17:48:41,909 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-11 17:48:41,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546266075] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:48:41,910 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:48:41,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13] total 31 [2024-10-11 17:48:41,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925464373] [2024-10-11 17:48:41,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:48:41,911 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-10-11 17:48:41,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:48:41,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-10-11 17:48:41,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=873, Unknown=0, NotChecked=0, Total=992 [2024-10-11 17:48:41,912 INFO L87 Difference]: Start difference. First operand 130 states and 148 transitions. Second operand has 32 states, 31 states have (on average 2.5161290322580645) 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) [2024-10-11 17:48:42,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:48:42,730 INFO L93 Difference]: Finished difference Result 136 states and 150 transitions. [2024-10-11 17:48:42,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-10-11 17:48:42,731 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.5161290322580645) 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 32 [2024-10-11 17:48:42,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:48:42,731 INFO L225 Difference]: With dead ends: 136 [2024-10-11 17:48:42,731 INFO L226 Difference]: Without dead ends: 79 [2024-10-11 17:48:42,732 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=278, Invalid=1978, Unknown=0, NotChecked=0, Total=2256 [2024-10-11 17:48:42,733 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 44 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-11 17:48:42,733 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 220 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 468 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-11 17:48:42,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2024-10-11 17:48:42,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 60. [2024-10-11 17:48:42,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.1355932203389831) internal successors, (67), 59 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) [2024-10-11 17:48:42,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 67 transitions. [2024-10-11 17:48:42,735 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 67 transitions. Word has length 32 [2024-10-11 17:48:42,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:48:42,735 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 67 transitions. [2024-10-11 17:48:42,735 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.5161290322580645) 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) [2024-10-11 17:48:42,735 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 67 transitions. [2024-10-11 17:48:42,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-10-11 17:48:42,736 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:48:42,736 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:48:42,753 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-10-11 17:48:42,939 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-10-11 17:48:42,940 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-10-11 17:48:42,940 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:48:42,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1825944624, now seen corresponding path program 4 times [2024-10-11 17:48:42,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:48:42,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859233525] [2024-10-11 17:48:42,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:48:42,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:48:42,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:48:43,290 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 17:48:43,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:48:43,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859233525] [2024-10-11 17:48:43,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859233525] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:48:43,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480956693] [2024-10-11 17:48:43,291 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-11 17:48:43,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:48:43,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:48:43,293 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:48:43,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-10-11 17:48:43,390 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-11 17:48:43,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 17:48:43,392 INFO L255 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-10-11 17:48:43,412 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:48:43,569 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 17:48:43,569 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:48:43,800 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2024-10-11 17:48:43,847 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 17:48:43,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480956693] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:48:43,848 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:48:43,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 26 [2024-10-11 17:48:43,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020281903] [2024-10-11 17:48:43,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:48:43,849 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-10-11 17:48:43,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:48:43,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-10-11 17:48:43,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2024-10-11 17:48:43,851 INFO L87 Difference]: Start difference. First operand 60 states and 67 transitions. Second operand has 27 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:48:44,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:48:44,165 INFO L93 Difference]: Finished difference Result 76 states and 84 transitions. [2024-10-11 17:48:44,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-11 17:48:44,165 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 27 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 33 [2024-10-11 17:48:44,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:48:44,166 INFO L225 Difference]: With dead ends: 76 [2024-10-11 17:48:44,166 INFO L226 Difference]: Without dead ends: 76 [2024-10-11 17:48:44,167 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=155, Invalid=967, Unknown=0, NotChecked=0, Total=1122 [2024-10-11 17:48:44,168 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 35 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-11 17:48:44,168 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 159 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-11 17:48:44,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-10-11 17:48:44,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 68. [2024-10-11 17:48:44,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.1343283582089552) internal successors, (76), 67 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) [2024-10-11 17:48:44,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 76 transitions. [2024-10-11 17:48:44,170 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 76 transitions. Word has length 33 [2024-10-11 17:48:44,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:48:44,171 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 76 transitions. [2024-10-11 17:48:44,171 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:48:44,171 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 76 transitions. [2024-10-11 17:48:44,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-10-11 17:48:44,172 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:48:44,172 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:48:44,188 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-10-11 17:48:44,376 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-10-11 17:48:44,377 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-10-11 17:48:44,377 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:48:44,377 INFO L85 PathProgramCache]: Analyzing trace with hash -416109260, now seen corresponding path program 5 times [2024-10-11 17:48:44,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:48:44,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832871146] [2024-10-11 17:48:44,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:48:44,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:48:44,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:48:45,359 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:48:45,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:48:45,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832871146] [2024-10-11 17:48:45,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832871146] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:48:45,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484617543] [2024-10-11 17:48:45,360 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-11 17:48:45,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:48:45,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:48:45,362 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:48:45,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-10-11 17:48:45,473 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-10-11 17:48:45,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 17:48:45,475 INFO L255 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-10-11 17:48:45,477 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:48:45,625 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 [2024-10-11 17:48:45,696 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 17:48:45,696 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:48:45,721 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 [2024-10-11 17:48:45,723 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 [2024-10-11 17:48:45,794 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 17:48:45,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484617543] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:48:45,795 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:48:45,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 14, 14] total 31 [2024-10-11 17:48:45,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927645383] [2024-10-11 17:48:45,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:48:45,795 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-10-11 17:48:45,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:48:45,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-10-11 17:48:45,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=837, Unknown=0, NotChecked=0, Total=930 [2024-10-11 17:48:45,797 INFO L87 Difference]: Start difference. First operand 68 states and 76 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:48:46,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:48:46,457 INFO L93 Difference]: Finished difference Result 115 states and 126 transitions. [2024-10-11 17:48:46,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-10-11 17:48:46,458 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 31 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) Word has length 37 [2024-10-11 17:48:46,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:48:46,459 INFO L225 Difference]: With dead ends: 115 [2024-10-11 17:48:46,460 INFO L226 Difference]: Without dead ends: 75 [2024-10-11 17:48:46,461 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=215, Invalid=2437, Unknown=0, NotChecked=0, Total=2652 [2024-10-11 17:48:46,461 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 53 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 676 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-11 17:48:46,462 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 257 Invalid, 688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 676 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-11 17:48:46,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-10-11 17:48:46,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2024-10-11 17:48:46,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.1267605633802817) internal successors, (80), 71 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:48:46,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 80 transitions. [2024-10-11 17:48:46,465 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 80 transitions. Word has length 37 [2024-10-11 17:48:46,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:48:46,465 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 80 transitions. [2024-10-11 17:48:46,465 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:48:46,465 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 80 transitions. [2024-10-11 17:48:46,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-10-11 17:48:46,466 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:48:46,466 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:48:46,483 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-10-11 17:48:46,670 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,20 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:48:46,671 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-10-11 17:48:46,671 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:48:46,671 INFO L85 PathProgramCache]: Analyzing trace with hash -462741713, now seen corresponding path program 6 times [2024-10-11 17:48:46,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:48:46,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283649081] [2024-10-11 17:48:46,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:48:46,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:48:46,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:48:47,041 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 17:48:47,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:48:47,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283649081] [2024-10-11 17:48:47,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283649081] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:48:47,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753108054] [2024-10-11 17:48:47,042 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-11 17:48:47,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:48:47,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:48:47,044 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:48:47,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-10-11 17:48:47,204 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-10-11 17:48:47,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 17:48:47,205 INFO L255 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-10-11 17:48:47,207 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:48:47,420 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 17:48:47,420 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:48:47,594 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-10-11 17:48:47,711 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 17:48:47,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753108054] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:48:47,711 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:48:47,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 34 [2024-10-11 17:48:47,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129189473] [2024-10-11 17:48:47,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:48:47,712 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-10-11 17:48:47,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:48:47,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-10-11 17:48:47,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1019, Unknown=0, NotChecked=0, Total=1190 [2024-10-11 17:48:47,713 INFO L87 Difference]: Start difference. First operand 72 states and 80 transitions. Second operand has 35 states, 34 states have (on average 2.735294117647059) internal successors, (93), 35 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:48:48,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:48:48,104 INFO L93 Difference]: Finished difference Result 91 states and 100 transitions. [2024-10-11 17:48:48,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-11 17:48:48,104 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.735294117647059) internal successors, (93), 35 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2024-10-11 17:48:48,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:48:48,105 INFO L225 Difference]: With dead ends: 91 [2024-10-11 17:48:48,105 INFO L226 Difference]: Without dead ends: 91 [2024-10-11 17:48:48,106 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=263, Invalid=1629, Unknown=0, NotChecked=0, Total=1892 [2024-10-11 17:48:48,106 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 49 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-11 17:48:48,106 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 267 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 469 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-11 17:48:48,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2024-10-11 17:48:48,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 80. [2024-10-11 17:48:48,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.1265822784810127) internal successors, (89), 79 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:48:48,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 89 transitions. [2024-10-11 17:48:48,109 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 89 transitions. Word has length 39 [2024-10-11 17:48:48,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:48:48,109 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 89 transitions. [2024-10-11 17:48:48,109 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.735294117647059) internal successors, (93), 35 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:48:48,109 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 89 transitions. [2024-10-11 17:48:48,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-10-11 17:48:48,110 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:48:48,110 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:48:48,127 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-10-11 17:48:48,310 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,21 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:48:48,311 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-10-11 17:48:48,311 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:48:48,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1879867571, now seen corresponding path program 7 times [2024-10-11 17:48:48,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:48:48,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514019412] [2024-10-11 17:48:48,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:48:48,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:48:48,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:48:48,800 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 11 proven. 37 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 17:48:48,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:48:48,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514019412] [2024-10-11 17:48:48,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514019412] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:48:48,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900799209] [2024-10-11 17:48:48,801 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-11 17:48:48,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:48:48,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:48:48,803 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:48:48,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-10-11 17:48:48,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:48:48,917 INFO L255 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 56 conjuncts are in the unsatisfiable core [2024-10-11 17:48:48,919 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:48:49,019 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 [2024-10-11 17:48:49,072 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 11 proven. 37 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 17:48:49,073 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:48:49,105 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 [2024-10-11 17:48:49,107 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 [2024-10-11 17:48:49,158 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 11 proven. 37 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 17:48:49,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900799209] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:48:49,159 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:48:49,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 29 [2024-10-11 17:48:49,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571785049] [2024-10-11 17:48:49,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:48:49,159 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-10-11 17:48:49,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:48:49,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-10-11 17:48:49,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=726, Unknown=0, NotChecked=0, Total=812 [2024-10-11 17:48:49,161 INFO L87 Difference]: Start difference. First operand 80 states and 89 transitions. Second operand has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 29 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:48:49,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:48:49,589 INFO L93 Difference]: Finished difference Result 137 states and 150 transitions. [2024-10-11 17:48:49,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-11 17:48:49,589 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 29 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 43 [2024-10-11 17:48:49,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:48:49,590 INFO L225 Difference]: With dead ends: 137 [2024-10-11 17:48:49,590 INFO L226 Difference]: Without dead ends: 86 [2024-10-11 17:48:49,590 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=169, Invalid=1553, Unknown=0, NotChecked=0, Total=1722 [2024-10-11 17:48:49,591 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 37 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-11 17:48:49,591 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 373 Invalid, 591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 587 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-11 17:48:49,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2024-10-11 17:48:49,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2024-10-11 17:48:49,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.1204819277108433) internal successors, (93), 83 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:48:49,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 93 transitions. [2024-10-11 17:48:49,593 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 93 transitions. Word has length 43 [2024-10-11 17:48:49,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:48:49,593 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 93 transitions. [2024-10-11 17:48:49,593 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 29 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:48:49,593 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 93 transitions. [2024-10-11 17:48:49,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-10-11 17:48:49,594 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:48:49,594 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:48:49,611 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-10-11 17:48:49,797 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2024-10-11 17:48:49,798 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-10-11 17:48:49,798 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:48:49,798 INFO L85 PathProgramCache]: Analyzing trace with hash 556288622, now seen corresponding path program 8 times [2024-10-11 17:48:49,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:48:49,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427000981] [2024-10-11 17:48:49,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:48:49,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:48:49,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:48:50,194 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 45 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 17:48:50,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:48:50,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427000981] [2024-10-11 17:48:50,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427000981] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:48:50,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290028198] [2024-10-11 17:48:50,195 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 17:48:50,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:48:50,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:48:50,197 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:48:50,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-10-11 17:48:50,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 17:48:50,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 17:48:50,315 INFO L255 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-10-11 17:48:50,316 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:48:50,492 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 16 proven. 41 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 17:48:50,493 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:48:50,702 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 [2024-10-11 17:48:50,777 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 16 proven. 41 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 17:48:50,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290028198] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:48:50,778 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:48:50,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 33 [2024-10-11 17:48:50,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288483008] [2024-10-11 17:48:50,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:48:50,786 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-10-11 17:48:50,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:48:50,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-10-11 17:48:50,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=988, Unknown=0, NotChecked=0, Total=1122 [2024-10-11 17:48:50,788 INFO L87 Difference]: Start difference. First operand 84 states and 93 transitions. Second operand has 34 states, 33 states have (on average 2.696969696969697) internal successors, (89), 34 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:48:51,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:48:51,186 INFO L93 Difference]: Finished difference Result 106 states and 116 transitions. [2024-10-11 17:48:51,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-11 17:48:51,187 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.696969696969697) internal successors, (89), 34 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2024-10-11 17:48:51,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:48:51,187 INFO L225 Difference]: With dead ends: 106 [2024-10-11 17:48:51,187 INFO L226 Difference]: Without dead ends: 106 [2024-10-11 17:48:51,188 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 658 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=268, Invalid=1894, Unknown=0, NotChecked=0, Total=2162 [2024-10-11 17:48:51,189 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 115 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-11 17:48:51,189 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 288 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-11 17:48:51,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2024-10-11 17:48:51,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 92. [2024-10-11 17:48:51,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.120879120879121) internal successors, (102), 91 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:48:51,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 102 transitions. [2024-10-11 17:48:51,195 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 102 transitions. Word has length 45 [2024-10-11 17:48:51,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:48:51,195 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 102 transitions. [2024-10-11 17:48:51,195 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.696969696969697) internal successors, (89), 34 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:48:51,195 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 102 transitions. [2024-10-11 17:48:51,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-10-11 17:48:51,196 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:48:51,196 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:48:51,214 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-10-11 17:48:51,396 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,23 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:48:51,397 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-10-11 17:48:51,397 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:48:51,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1739846770, now seen corresponding path program 9 times [2024-10-11 17:48:51,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:48:51,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648083902] [2024-10-11 17:48:51,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:48:51,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:48:51,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:48:51,936 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 14 proven. 61 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 17:48:51,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:48:51,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648083902] [2024-10-11 17:48:51,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648083902] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:48:51,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841741763] [2024-10-11 17:48:51,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 17:48:51,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:48:51,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:48:51,939 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:48:51,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-10-11 17:48:52,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-10-11 17:48:52,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 17:48:52,090 INFO L255 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 70 conjuncts are in the unsatisfiable core [2024-10-11 17:48:52,091 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:48:52,178 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-11 17:48:52,311 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 14 proven. 61 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 17:48:52,311 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:48:52,367 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 [2024-10-11 17:48:52,370 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 [2024-10-11 17:48:52,510 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 14 proven. 61 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 17:48:52,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841741763] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:48:52,510 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:48:52,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 18] total 38 [2024-10-11 17:48:52,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332281021] [2024-10-11 17:48:52,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:48:52,511 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-10-11 17:48:52,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:48:52,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-10-11 17:48:52,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1285, Unknown=0, NotChecked=0, Total=1406 [2024-10-11 17:48:52,512 INFO L87 Difference]: Start difference. First operand 92 states and 102 transitions. Second operand has 38 states, 38 states have (on average 2.4473684210526314) internal successors, (93), 38 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:48:52,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:48:52,949 INFO L93 Difference]: Finished difference Result 160 states and 175 transitions. [2024-10-11 17:48:52,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-10-11 17:48:52,949 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.4473684210526314) internal successors, (93), 38 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2024-10-11 17:48:52,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:48:52,950 INFO L225 Difference]: With dead ends: 160 [2024-10-11 17:48:52,950 INFO L226 Difference]: Without dead ends: 98 [2024-10-11 17:48:52,951 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=198, Invalid=2252, Unknown=0, NotChecked=0, Total=2450 [2024-10-11 17:48:52,951 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 73 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 815 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-11 17:48:52,951 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 494 Invalid, 820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 815 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-11 17:48:52,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2024-10-11 17:48:52,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 96. [2024-10-11 17:48:52,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.1157894736842104) internal successors, (106), 95 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) [2024-10-11 17:48:52,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 106 transitions. [2024-10-11 17:48:52,954 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 106 transitions. Word has length 49 [2024-10-11 17:48:52,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:48:52,954 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 106 transitions. [2024-10-11 17:48:52,954 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.4473684210526314) internal successors, (93), 38 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:48:52,954 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 106 transitions. [2024-10-11 17:48:52,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-10-11 17:48:52,955 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:48:52,955 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:48:52,970 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-10-11 17:48:53,155 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,24 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:48:53,156 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-10-11 17:48:53,156 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:48:53,156 INFO L85 PathProgramCache]: Analyzing trace with hash 21120493, now seen corresponding path program 10 times [2024-10-11 17:48:53,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:48:53,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460290060] [2024-10-11 17:48:53,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:48:53,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:48:53,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:48:53,599 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 20 proven. 66 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 17:48:53,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:48:53,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460290060] [2024-10-11 17:48:53,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460290060] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:48:53,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759060770] [2024-10-11 17:48:53,599 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-11 17:48:53,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:48:53,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:48:53,601 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:48:53,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-10-11 17:48:53,705 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-11 17:48:53,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 17:48:53,707 INFO L255 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 58 conjuncts are in the unsatisfiable core [2024-10-11 17:48:53,709 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:48:53,908 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 30 proven. 56 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 17:48:53,908 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:48:54,190 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2024-10-11 17:48:54,272 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 30 proven. 56 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 17:48:54,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759060770] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:48:54,273 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:48:54,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 38 [2024-10-11 17:48:54,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408436940] [2024-10-11 17:48:54,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:48:54,273 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-10-11 17:48:54,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:48:54,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-10-11 17:48:54,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1312, Unknown=0, NotChecked=0, Total=1482 [2024-10-11 17:48:54,275 INFO L87 Difference]: Start difference. First operand 96 states and 106 transitions. Second operand has 39 states, 38 states have (on average 2.763157894736842) internal successors, (105), 39 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:48:54,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:48:54,755 INFO L93 Difference]: Finished difference Result 121 states and 132 transitions. [2024-10-11 17:48:54,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-10-11 17:48:54,755 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.763157894736842) internal successors, (105), 39 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2024-10-11 17:48:54,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:48:54,756 INFO L225 Difference]: With dead ends: 121 [2024-10-11 17:48:54,756 INFO L226 Difference]: Without dead ends: 121 [2024-10-11 17:48:54,757 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 75 SyntacticMatches, 6 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 871 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=312, Invalid=2340, Unknown=0, NotChecked=0, Total=2652 [2024-10-11 17:48:54,757 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 109 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 665 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-11 17:48:54,757 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 357 Invalid, 665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 665 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-11 17:48:54,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2024-10-11 17:48:54,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 104. [2024-10-11 17:48:54,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.116504854368932) internal successors, (115), 103 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) [2024-10-11 17:48:54,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 115 transitions. [2024-10-11 17:48:54,760 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 115 transitions. Word has length 51 [2024-10-11 17:48:54,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:48:54,761 INFO L471 AbstractCegarLoop]: Abstraction has 104 states and 115 transitions. [2024-10-11 17:48:54,761 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.763157894736842) internal successors, (105), 39 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:48:54,761 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 115 transitions. [2024-10-11 17:48:54,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-10-11 17:48:54,762 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:48:54,762 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:48:54,776 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-10-11 17:48:54,962 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-10-11 17:48:54,962 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-10-11 17:48:54,963 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:48:54,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1800804465, now seen corresponding path program 11 times [2024-10-11 17:48:54,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:48:54,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041875262] [2024-10-11 17:48:54,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:48:54,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:48:54,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:48:55,543 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 17 proven. 91 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 17:48:55,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:48:55,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041875262] [2024-10-11 17:48:55,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041875262] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:48:55,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236039157] [2024-10-11 17:48:55,544 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-11 17:48:55,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:48:55,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:48:55,545 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:48:55,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-10-11 17:48:55,662 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-10-11 17:48:55,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 17:48:55,664 INFO L255 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 74 conjuncts are in the unsatisfiable core [2024-10-11 17:48:55,666 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:48:55,806 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 [2024-10-11 17:48:55,886 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 17 proven. 91 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 17:48:55,886 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:48:55,917 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 [2024-10-11 17:48:55,918 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 [2024-10-11 17:48:55,975 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 17 proven. 91 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 17:48:55,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236039157] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:48:55,976 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:48:55,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 20] total 35 [2024-10-11 17:48:55,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115722086] [2024-10-11 17:48:55,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:48:55,977 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-10-11 17:48:55,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:48:55,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-10-11 17:48:55,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1088, Unknown=0, NotChecked=0, Total=1190 [2024-10-11 17:48:55,978 INFO L87 Difference]: Start difference. First operand 104 states and 115 transitions. Second operand has 35 states, 35 states have (on average 2.342857142857143) internal successors, (82), 35 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) [2024-10-11 17:48:56,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:48:56,590 INFO L93 Difference]: Finished difference Result 183 states and 200 transitions. [2024-10-11 17:48:56,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-10-11 17:48:56,591 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.342857142857143) internal successors, (82), 35 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) Word has length 55 [2024-10-11 17:48:56,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:48:56,591 INFO L225 Difference]: With dead ends: 183 [2024-10-11 17:48:56,591 INFO L226 Difference]: Without dead ends: 110 [2024-10-11 17:48:56,592 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 571 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=209, Invalid=2443, Unknown=0, NotChecked=0, Total=2652 [2024-10-11 17:48:56,592 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 80 mSDsluCounter, 622 mSDsCounter, 0 mSdLazyCounter, 1031 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 652 SdHoareTripleChecker+Invalid, 1037 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1031 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-11 17:48:56,592 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 652 Invalid, 1037 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1031 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-11 17:48:56,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2024-10-11 17:48:56,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 108. [2024-10-11 17:48:56,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.1121495327102804) internal successors, (119), 107 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:48:56,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 119 transitions. [2024-10-11 17:48:56,595 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 119 transitions. Word has length 55 [2024-10-11 17:48:56,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:48:56,595 INFO L471 AbstractCegarLoop]: Abstraction has 108 states and 119 transitions. [2024-10-11 17:48:56,596 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.342857142857143) internal successors, (82), 35 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) [2024-10-11 17:48:56,596 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 119 transitions. [2024-10-11 17:48:56,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-10-11 17:48:56,596 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:48:56,596 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:48:56,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-10-11 17:48:56,796 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-10-11 17:48:56,797 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-10-11 17:48:56,797 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:48:56,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1707221420, now seen corresponding path program 12 times [2024-10-11 17:48:56,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:48:56,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517056373] [2024-10-11 17:48:56,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:48:56,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:48:56,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:48:57,313 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 30 proven. 91 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 17:48:57,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:48:57,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517056373] [2024-10-11 17:48:57,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517056373] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:48:57,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626947992] [2024-10-11 17:48:57,313 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-11 17:48:57,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:48:57,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:48:57,314 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:48:57,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-10-11 17:48:57,562 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2024-10-11 17:48:57,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 17:48:57,564 INFO L255 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-10-11 17:48:57,565 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:48:57,905 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 42 proven. 79 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 17:48:57,905 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:48:58,288 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2024-10-11 17:48:58,391 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 42 proven. 79 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 17:48:58,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626947992] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:48:58,391 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:48:58,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 49 [2024-10-11 17:48:58,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380155763] [2024-10-11 17:48:58,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:48:58,392 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-10-11 17:48:58,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:48:58,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-10-11 17:48:58,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=310, Invalid=2140, Unknown=0, NotChecked=0, Total=2450 [2024-10-11 17:48:58,394 INFO L87 Difference]: Start difference. First operand 108 states and 119 transitions. Second operand has 50 states, 49 states have (on average 2.877551020408163) internal successors, (141), 50 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:48:58,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:48:58,962 INFO L93 Difference]: Finished difference Result 136 states and 148 transitions. [2024-10-11 17:48:58,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-10-11 17:48:58,962 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 2.877551020408163) internal successors, (141), 50 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2024-10-11 17:48:58,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:48:58,963 INFO L225 Difference]: With dead ends: 136 [2024-10-11 17:48:58,963 INFO L226 Difference]: Without dead ends: 136 [2024-10-11 17:48:58,964 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 77 SyntacticMatches, 7 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1462 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=549, Invalid=3611, Unknown=0, NotChecked=0, Total=4160 [2024-10-11 17:48:58,965 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 169 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 767 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 767 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-11 17:48:58,965 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 424 Invalid, 767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 767 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-11 17:48:58,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2024-10-11 17:48:58,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 116. [2024-10-11 17:48:58,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.1130434782608696) internal successors, (128), 115 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:48:58,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 128 transitions. [2024-10-11 17:48:58,967 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 128 transitions. Word has length 57 [2024-10-11 17:48:58,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:48:58,968 INFO L471 AbstractCegarLoop]: Abstraction has 116 states and 128 transitions. [2024-10-11 17:48:58,968 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 2.877551020408163) internal successors, (141), 50 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:48:58,968 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 128 transitions. [2024-10-11 17:48:58,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-10-11 17:48:58,968 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:48:58,968 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:48:58,981 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-10-11 17:48:59,169 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,27 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:48:59,169 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-10-11 17:48:59,169 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:48:59,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1863058256, now seen corresponding path program 13 times [2024-10-11 17:48:59,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:48:59,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448327162] [2024-10-11 17:48:59,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:48:59,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:48:59,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:48:59,804 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 20 proven. 127 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 17:48:59,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:48:59,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448327162] [2024-10-11 17:48:59,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448327162] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:48:59,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890902455] [2024-10-11 17:48:59,805 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-11 17:48:59,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:48:59,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:48:59,806 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:48:59,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-10-11 17:48:59,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:48:59,930 INFO L255 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 86 conjuncts are in the unsatisfiable core [2024-10-11 17:48:59,931 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:49:00,100 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 [2024-10-11 17:49:00,173 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 20 proven. 127 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 17:49:00,174 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:49:00,209 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 [2024-10-11 17:49:00,211 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 [2024-10-11 17:49:00,274 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 20 proven. 127 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 17:49:00,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890902455] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:49:00,275 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:49:00,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22, 22] total 38 [2024-10-11 17:49:00,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851611898] [2024-10-11 17:49:00,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:49:00,275 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-10-11 17:49:00,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:49:00,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-10-11 17:49:00,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1296, Unknown=0, NotChecked=0, Total=1406 [2024-10-11 17:49:00,276 INFO L87 Difference]: Start difference. First operand 116 states and 128 transitions. Second operand has 38 states, 38 states have (on average 2.3684210526315788) internal successors, (90), 38 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:49:01,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:49:01,072 INFO L93 Difference]: Finished difference Result 206 states and 225 transitions. [2024-10-11 17:49:01,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-10-11 17:49:01,072 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.3684210526315788) internal successors, (90), 38 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2024-10-11 17:49:01,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:49:01,073 INFO L225 Difference]: With dead ends: 206 [2024-10-11 17:49:01,073 INFO L226 Difference]: Without dead ends: 122 [2024-10-11 17:49:01,074 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=229, Invalid=2963, Unknown=0, NotChecked=0, Total=3192 [2024-10-11 17:49:01,075 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 93 mSDsluCounter, 775 mSDsCounter, 0 mSdLazyCounter, 1294 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 809 SdHoareTripleChecker+Invalid, 1308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-11 17:49:01,075 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 809 Invalid, 1308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1294 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-11 17:49:01,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2024-10-11 17:49:01,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 120. [2024-10-11 17:49:01,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 1.1092436974789917) internal successors, (132), 119 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:49:01,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 132 transitions. [2024-10-11 17:49:01,078 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 132 transitions. Word has length 61 [2024-10-11 17:49:01,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:49:01,078 INFO L471 AbstractCegarLoop]: Abstraction has 120 states and 132 transitions. [2024-10-11 17:49:01,078 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.3684210526315788) internal successors, (90), 38 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:49:01,078 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 132 transitions. [2024-10-11 17:49:01,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-10-11 17:49:01,079 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:49:01,079 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:49:01,097 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-10-11 17:49:01,279 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,28 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:49:01,280 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-10-11 17:49:01,280 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:49:01,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1401220523, now seen corresponding path program 14 times [2024-10-11 17:49:01,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:49:01,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049802710] [2024-10-11 17:49:01,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:49:01,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:49:01,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:49:01,986 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 42 proven. 120 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 17:49:01,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:49:01,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049802710] [2024-10-11 17:49:01,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049802710] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:49:01,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415096146] [2024-10-11 17:49:01,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 17:49:01,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:49:01,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:49:01,988 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:49:01,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-10-11 17:49:02,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 17:49:02,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 17:49:02,116 INFO L255 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 79 conjuncts are in the unsatisfiable core [2024-10-11 17:49:02,117 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:49:02,396 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 49 proven. 113 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 17:49:02,396 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:49:02,774 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 [2024-10-11 17:49:02,921 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 49 proven. 113 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 17:49:02,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415096146] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:49:02,922 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:49:02,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 45 [2024-10-11 17:49:02,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117731178] [2024-10-11 17:49:02,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:49:02,922 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-10-11 17:49:02,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:49:02,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-10-11 17:49:02,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=1832, Unknown=0, NotChecked=0, Total=2070 [2024-10-11 17:49:02,923 INFO L87 Difference]: Start difference. First operand 120 states and 132 transitions. Second operand has 46 states, 45 states have (on average 2.7777777777777777) internal successors, (125), 46 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:49:03,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:49:03,726 INFO L93 Difference]: Finished difference Result 151 states and 164 transitions. [2024-10-11 17:49:03,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-10-11 17:49:03,726 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 2.7777777777777777) internal successors, (125), 46 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2024-10-11 17:49:03,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:49:03,727 INFO L225 Difference]: With dead ends: 151 [2024-10-11 17:49:03,727 INFO L226 Difference]: Without dead ends: 151 [2024-10-11 17:49:03,728 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 93 SyntacticMatches, 9 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1427 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=465, Invalid=3695, Unknown=0, NotChecked=0, Total=4160 [2024-10-11 17:49:03,728 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 199 mSDsluCounter, 624 mSDsCounter, 0 mSdLazyCounter, 1205 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 660 SdHoareTripleChecker+Invalid, 1205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-11 17:49:03,729 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 660 Invalid, 1205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1205 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-11 17:49:03,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2024-10-11 17:49:03,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 128. [2024-10-11 17:49:03,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 1.110236220472441) internal successors, (141), 127 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:49:03,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 141 transitions. [2024-10-11 17:49:03,731 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 141 transitions. Word has length 63 [2024-10-11 17:49:03,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:49:03,732 INFO L471 AbstractCegarLoop]: Abstraction has 128 states and 141 transitions. [2024-10-11 17:49:03,732 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 2.7777777777777777) internal successors, (125), 46 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:49:03,732 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 141 transitions. [2024-10-11 17:49:03,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-10-11 17:49:03,732 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:49:03,732 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:49:03,747 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-10-11 17:49:03,933 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-10-11 17:49:03,933 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-10-11 17:49:03,934 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:49:03,934 INFO L85 PathProgramCache]: Analyzing trace with hash 140685615, now seen corresponding path program 15 times [2024-10-11 17:49:03,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:49:03,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779601578] [2024-10-11 17:49:03,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:49:03,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:49:03,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:49:04,723 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 23 proven. 169 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 17:49:04,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:49:04,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779601578] [2024-10-11 17:49:04,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779601578] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:49:04,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409564285] [2024-10-11 17:49:04,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 17:49:04,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:49:04,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:49:04,725 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:49:04,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-10-11 17:49:04,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2024-10-11 17:49:04,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 17:49:04,994 INFO L255 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 94 conjuncts are in the unsatisfiable core [2024-10-11 17:49:04,996 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:49:05,204 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 13 treesize of output 9 [2024-10-11 17:49:05,284 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 23 proven. 169 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 17:49:05,284 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:49:05,326 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 [2024-10-11 17:49:05,327 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 [2024-10-11 17:49:05,399 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 23 proven. 169 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 17:49:05,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409564285] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:49:05,400 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:49:05,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 24, 24] total 41 [2024-10-11 17:49:05,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872950504] [2024-10-11 17:49:05,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:49:05,400 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-10-11 17:49:05,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:49:05,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-10-11 17:49:05,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1522, Unknown=0, NotChecked=0, Total=1640 [2024-10-11 17:49:05,402 INFO L87 Difference]: Start difference. First operand 128 states and 141 transitions. Second operand has 41 states, 41 states have (on average 2.3902439024390243) internal successors, (98), 41 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:49:06,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:49:06,402 INFO L93 Difference]: Finished difference Result 229 states and 250 transitions. [2024-10-11 17:49:06,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-10-11 17:49:06,403 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.3902439024390243) internal successors, (98), 41 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2024-10-11 17:49:06,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:49:06,404 INFO L225 Difference]: With dead ends: 229 [2024-10-11 17:49:06,404 INFO L226 Difference]: Without dead ends: 134 [2024-10-11 17:49:06,406 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 820 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=249, Invalid=3533, Unknown=0, NotChecked=0, Total=3782 [2024-10-11 17:49:06,407 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 108 mSDsluCounter, 905 mSDsCounter, 0 mSdLazyCounter, 1510 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 943 SdHoareTripleChecker+Invalid, 1526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-11 17:49:06,407 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 943 Invalid, 1526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1510 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-11 17:49:06,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2024-10-11 17:49:06,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 132. [2024-10-11 17:49:06,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 1.1068702290076335) internal successors, (145), 131 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:49:06,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 145 transitions. [2024-10-11 17:49:06,411 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 145 transitions. Word has length 67 [2024-10-11 17:49:06,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:49:06,413 INFO L471 AbstractCegarLoop]: Abstraction has 132 states and 145 transitions. [2024-10-11 17:49:06,413 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.3902439024390243) internal successors, (98), 41 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:49:06,413 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 145 transitions. [2024-10-11 17:49:06,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-10-11 17:49:06,413 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:49:06,416 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:49:06,434 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2024-10-11 17:49:06,616 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39,30 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:49:06,617 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-10-11 17:49:06,617 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:49:06,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1413200362, now seen corresponding path program 16 times [2024-10-11 17:49:06,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:49:06,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695104227] [2024-10-11 17:49:06,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:49:06,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:49:06,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:49:07,340 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 56 proven. 153 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 17:49:07,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:49:07,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695104227] [2024-10-11 17:49:07,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695104227] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:49:07,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863285115] [2024-10-11 17:49:07,341 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-11 17:49:07,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:49:07,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:49:07,343 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:49:07,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-10-11 17:49:07,603 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-11 17:49:07,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 17:49:07,607 INFO L255 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 85 conjuncts are in the unsatisfiable core [2024-10-11 17:49:07,609 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:49:08,003 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 72 proven. 137 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 17:49:08,003 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:49:08,461 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2024-10-11 17:49:08,652 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 72 proven. 137 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 17:49:08,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863285115] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:49:08,652 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:49:08,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 50 [2024-10-11 17:49:08,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504682272] [2024-10-11 17:49:08,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:49:08,653 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-10-11 17:49:08,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:49:08,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-10-11 17:49:08,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=2263, Unknown=0, NotChecked=0, Total=2550 [2024-10-11 17:49:08,655 INFO L87 Difference]: Start difference. First operand 132 states and 145 transitions. Second operand has 51 states, 50 states have (on average 2.82) internal successors, (141), 51 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:49:09,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:49:09,603 INFO L93 Difference]: Finished difference Result 166 states and 180 transitions. [2024-10-11 17:49:09,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-10-11 17:49:09,603 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 2.82) internal successors, (141), 51 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2024-10-11 17:49:09,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:49:09,604 INFO L225 Difference]: With dead ends: 166 [2024-10-11 17:49:09,604 INFO L226 Difference]: Without dead ends: 166 [2024-10-11 17:49:09,604 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 102 SyntacticMatches, 9 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1726 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=522, Invalid=4308, Unknown=0, NotChecked=0, Total=4830 [2024-10-11 17:49:09,605 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 174 mSDsluCounter, 970 mSDsCounter, 0 mSdLazyCounter, 1741 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 1010 SdHoareTripleChecker+Invalid, 1741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-11 17:49:09,605 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 1010 Invalid, 1741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1741 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-11 17:49:09,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2024-10-11 17:49:09,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 140. [2024-10-11 17:49:09,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 1.1079136690647482) internal successors, (154), 139 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:49:09,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 154 transitions. [2024-10-11 17:49:09,608 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 154 transitions. Word has length 69 [2024-10-11 17:49:09,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:49:09,608 INFO L471 AbstractCegarLoop]: Abstraction has 140 states and 154 transitions. [2024-10-11 17:49:09,608 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 2.82) internal successors, (141), 51 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:49:09,608 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 154 transitions. [2024-10-11 17:49:09,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-10-11 17:49:09,609 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:49:09,609 INFO L215 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:49:09,628 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2024-10-11 17:49:09,809 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,31 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:49:09,809 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-10-11 17:49:09,810 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:49:09,810 INFO L85 PathProgramCache]: Analyzing trace with hash -62175762, now seen corresponding path program 17 times [2024-10-11 17:49:09,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:49:09,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804009936] [2024-10-11 17:49:09,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:49:09,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:49:09,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:49:10,587 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 26 proven. 217 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 17:49:10,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:49:10,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804009936] [2024-10-11 17:49:10,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804009936] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:49:10,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388308723] [2024-10-11 17:49:10,587 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-11 17:49:10,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:49:10,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:49:10,592 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:49:10,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-10-11 17:49:10,784 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2024-10-11 17:49:10,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 17:49:10,787 INFO L255 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 104 conjuncts are in the unsatisfiable core [2024-10-11 17:49:10,789 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:49:11,089 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 [2024-10-11 17:49:11,173 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 26 proven. 217 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 17:49:11,173 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:49:11,218 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 [2024-10-11 17:49:11,220 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 [2024-10-11 17:49:11,293 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 26 proven. 217 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 17:49:11,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388308723] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:49:11,293 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:49:11,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 26, 26] total 44 [2024-10-11 17:49:11,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409921221] [2024-10-11 17:49:11,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:49:11,294 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-10-11 17:49:11,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:49:11,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-10-11 17:49:11,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1766, Unknown=0, NotChecked=0, Total=1892 [2024-10-11 17:49:11,295 INFO L87 Difference]: Start difference. First operand 140 states and 154 transitions. Second operand has 44 states, 44 states have (on average 2.409090909090909) internal successors, (106), 44 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) [2024-10-11 17:49:12,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:49:12,330 INFO L93 Difference]: Finished difference Result 252 states and 275 transitions. [2024-10-11 17:49:12,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-10-11 17:49:12,330 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.409090909090909) internal successors, (106), 44 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2024-10-11 17:49:12,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:49:12,331 INFO L225 Difference]: With dead ends: 252 [2024-10-11 17:49:12,331 INFO L226 Difference]: Without dead ends: 146 [2024-10-11 17:49:12,332 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 961 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=269, Invalid=4153, Unknown=0, NotChecked=0, Total=4422 [2024-10-11 17:49:12,332 INFO L432 NwaCegarLoop]: 42 mSDtfsCounter, 77 mSDsluCounter, 1119 mSDsCounter, 0 mSdLazyCounter, 1917 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 1161 SdHoareTripleChecker+Invalid, 1935 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-11 17:49:12,332 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 1161 Invalid, 1935 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1917 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-11 17:49:12,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2024-10-11 17:49:12,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 144. [2024-10-11 17:49:12,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 1.1048951048951048) internal successors, (158), 143 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:49:12,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 158 transitions. [2024-10-11 17:49:12,336 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 158 transitions. Word has length 73 [2024-10-11 17:49:12,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:49:12,336 INFO L471 AbstractCegarLoop]: Abstraction has 144 states and 158 transitions. [2024-10-11 17:49:12,336 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.409090909090909) internal successors, (106), 44 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) [2024-10-11 17:49:12,336 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 158 transitions. [2024-10-11 17:49:12,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2024-10-11 17:49:12,336 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:49:12,337 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:49:12,352 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-10-11 17:49:12,537 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,32 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:49:12,537 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-10-11 17:49:12,538 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:49:12,538 INFO L85 PathProgramCache]: Analyzing trace with hash 392926825, now seen corresponding path program 18 times [2024-10-11 17:49:12,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:49:12,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096417391] [2024-10-11 17:49:12,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:49:12,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:49:12,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:49:13,335 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 72 proven. 190 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 17:49:13,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:49:13,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096417391] [2024-10-11 17:49:13,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096417391] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:49:13,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272492460] [2024-10-11 17:49:13,336 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-11 17:49:13,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:49:13,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:49:13,338 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:49:13,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-10-11 17:49:13,705 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2024-10-11 17:49:13,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 17:49:13,708 INFO L255 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 81 conjuncts are in the unsatisfiable core [2024-10-11 17:49:13,709 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:49:14,246 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 81 proven. 181 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 17:49:14,246 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:49:14,853 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2024-10-11 17:49:15,068 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 81 proven. 181 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 17:49:15,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272492460] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:49:15,069 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:49:15,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 63 [2024-10-11 17:49:15,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948003596] [2024-10-11 17:49:15,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:49:15,070 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2024-10-11 17:49:15,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:49:15,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2024-10-11 17:49:15,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=539, Invalid=3493, Unknown=0, NotChecked=0, Total=4032 [2024-10-11 17:49:15,071 INFO L87 Difference]: Start difference. First operand 144 states and 158 transitions. Second operand has 64 states, 63 states have (on average 2.9365079365079363) internal successors, (185), 64 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:49:15,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:49:15,994 INFO L93 Difference]: Finished difference Result 181 states and 196 transitions. [2024-10-11 17:49:15,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-10-11 17:49:15,995 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 63 states have (on average 2.9365079365079363) internal successors, (185), 64 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2024-10-11 17:49:15,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:49:15,996 INFO L225 Difference]: With dead ends: 181 [2024-10-11 17:49:15,996 INFO L226 Difference]: Without dead ends: 181 [2024-10-11 17:49:15,997 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 101 SyntacticMatches, 11 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2749 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=969, Invalid=6513, Unknown=0, NotChecked=0, Total=7482 [2024-10-11 17:49:15,997 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 151 mSDsluCounter, 694 mSDsCounter, 0 mSdLazyCounter, 1271 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 738 SdHoareTripleChecker+Invalid, 1271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-11 17:49:15,997 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 738 Invalid, 1271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1271 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-11 17:49:15,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2024-10-11 17:49:16,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 152. [2024-10-11 17:49:16,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.1059602649006623) internal successors, (167), 151 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:49:16,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 167 transitions. [2024-10-11 17:49:16,002 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 167 transitions. Word has length 75 [2024-10-11 17:49:16,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:49:16,003 INFO L471 AbstractCegarLoop]: Abstraction has 152 states and 167 transitions. [2024-10-11 17:49:16,003 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 63 states have (on average 2.9365079365079363) internal successors, (185), 64 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:49:16,003 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 167 transitions. [2024-10-11 17:49:16,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-10-11 17:49:16,004 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:49:16,004 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:49:16,018 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2024-10-11 17:49:16,204 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2024-10-11 17:49:16,205 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-10-11 17:49:16,205 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:49:16,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1289041171, now seen corresponding path program 19 times [2024-10-11 17:49:16,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:49:16,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172887249] [2024-10-11 17:49:16,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:49:16,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:49:16,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:49:17,035 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 29 proven. 271 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 17:49:17,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:49:17,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172887249] [2024-10-11 17:49:17,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172887249] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:49:17,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095858750] [2024-10-11 17:49:17,036 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-11 17:49:17,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:49:17,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:49:17,037 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:49:17,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-10-11 17:49:17,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:49:17,188 INFO L255 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 116 conjuncts are in the unsatisfiable core [2024-10-11 17:49:17,190 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:49:17,445 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 [2024-10-11 17:49:17,537 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 29 proven. 271 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 17:49:17,537 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:49:17,597 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 [2024-10-11 17:49:17,599 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 [2024-10-11 17:49:17,677 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 29 proven. 271 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 17:49:17,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095858750] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:49:17,677 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:49:17,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 28, 28] total 47 [2024-10-11 17:49:17,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294553379] [2024-10-11 17:49:17,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:49:17,678 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-10-11 17:49:17,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:49:17,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-10-11 17:49:17,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=2028, Unknown=0, NotChecked=0, Total=2162 [2024-10-11 17:49:17,679 INFO L87 Difference]: Start difference. First operand 152 states and 167 transitions. Second operand has 47 states, 47 states have (on average 2.425531914893617) internal successors, (114), 47 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) [2024-10-11 17:49:18,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:49:18,938 INFO L93 Difference]: Finished difference Result 275 states and 300 transitions. [2024-10-11 17:49:18,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-10-11 17:49:18,938 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.425531914893617) internal successors, (114), 47 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) Word has length 79 [2024-10-11 17:49:18,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:49:18,939 INFO L225 Difference]: With dead ends: 275 [2024-10-11 17:49:18,939 INFO L226 Difference]: Without dead ends: 158 [2024-10-11 17:49:18,940 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1113 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=289, Invalid=4823, Unknown=0, NotChecked=0, Total=5112 [2024-10-11 17:49:18,940 INFO L432 NwaCegarLoop]: 46 mSDtfsCounter, 83 mSDsluCounter, 1440 mSDsCounter, 0 mSdLazyCounter, 2387 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 1486 SdHoareTripleChecker+Invalid, 2397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 2387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-10-11 17:49:18,941 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 1486 Invalid, 2397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 2387 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-10-11 17:49:18,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2024-10-11 17:49:18,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 156. [2024-10-11 17:49:18,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 1.103225806451613) internal successors, (171), 155 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:49:18,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 171 transitions. [2024-10-11 17:49:18,944 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 171 transitions. Word has length 79 [2024-10-11 17:49:18,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:49:18,944 INFO L471 AbstractCegarLoop]: Abstraction has 156 states and 171 transitions. [2024-10-11 17:49:18,944 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.425531914893617) internal successors, (114), 47 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) [2024-10-11 17:49:18,945 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 171 transitions. [2024-10-11 17:49:18,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-10-11 17:49:18,945 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:49:18,945 INFO L215 NwaCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:49:18,961 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2024-10-11 17:49:19,146 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,34 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:49:19,146 INFO L396 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-10-11 17:49:19,146 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:49:19,147 INFO L85 PathProgramCache]: Analyzing trace with hash 1399690024, now seen corresponding path program 20 times [2024-10-11 17:49:19,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:49:19,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048022258] [2024-10-11 17:49:19,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:49:19,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:49:19,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:49:19,999 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 90 proven. 231 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 17:49:20,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:49:20,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048022258] [2024-10-11 17:49:20,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048022258] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:49:20,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381385577] [2024-10-11 17:49:20,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 17:49:20,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:49:20,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:49:20,002 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:49:20,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-10-11 17:49:20,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 17:49:20,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 17:49:20,172 INFO L255 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 106 conjuncts are in the unsatisfiable core [2024-10-11 17:49:20,175 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:49:20,618 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 100 proven. 221 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 17:49:20,618 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:49:21,111 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 [2024-10-11 17:49:21,327 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 100 proven. 221 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 17:49:21,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381385577] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:49:21,327 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:49:21,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 57 [2024-10-11 17:49:21,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269316689] [2024-10-11 17:49:21,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:49:21,328 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2024-10-11 17:49:21,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:49:21,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2024-10-11 17:49:21,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=379, Invalid=2927, Unknown=0, NotChecked=0, Total=3306 [2024-10-11 17:49:21,329 INFO L87 Difference]: Start difference. First operand 156 states and 171 transitions. Second operand has 58 states, 57 states have (on average 2.824561403508772) internal successors, (161), 58 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:49:22,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:49:22,492 INFO L93 Difference]: Finished difference Result 196 states and 212 transitions. [2024-10-11 17:49:22,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-10-11 17:49:22,493 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 57 states have (on average 2.824561403508772) internal successors, (161), 58 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2024-10-11 17:49:22,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:49:22,493 INFO L225 Difference]: With dead ends: 196 [2024-10-11 17:49:22,493 INFO L226 Difference]: Without dead ends: 196 [2024-10-11 17:49:22,494 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 120 SyntacticMatches, 12 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2483 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=717, Invalid=6089, Unknown=0, NotChecked=0, Total=6806 [2024-10-11 17:49:22,495 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 138 mSDsluCounter, 1115 mSDsCounter, 0 mSdLazyCounter, 1934 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 1163 SdHoareTripleChecker+Invalid, 1934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1934 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-10-11 17:49:22,495 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 1163 Invalid, 1934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1934 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-10-11 17:49:22,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2024-10-11 17:49:22,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 164. [2024-10-11 17:49:22,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 1.1042944785276074) internal successors, (180), 163 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:49:22,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 180 transitions. [2024-10-11 17:49:22,498 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 180 transitions. Word has length 81 [2024-10-11 17:49:22,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:49:22,499 INFO L471 AbstractCegarLoop]: Abstraction has 164 states and 180 transitions. [2024-10-11 17:49:22,499 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 57 states have (on average 2.824561403508772) internal successors, (161), 58 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:49:22,499 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 180 transitions. [2024-10-11 17:49:22,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2024-10-11 17:49:22,500 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:49:22,500 INFO L215 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:49:22,514 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2024-10-11 17:49:22,703 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2024-10-11 17:49:22,704 INFO L396 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-10-11 17:49:22,704 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:49:22,704 INFO L85 PathProgramCache]: Analyzing trace with hash -263040980, now seen corresponding path program 21 times [2024-10-11 17:49:22,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:49:22,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047681060] [2024-10-11 17:49:22,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:49:22,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:49:22,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:49:23,581 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 32 proven. 331 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 17:49:23,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:49:23,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047681060] [2024-10-11 17:49:23,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047681060] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:49:23,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51866920] [2024-10-11 17:49:23,582 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 17:49:23,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:49:23,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:49:23,583 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:49:23,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-10-11 17:49:23,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2024-10-11 17:49:23,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 17:49:23,889 INFO L255 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 128 conjuncts are in the unsatisfiable core [2024-10-11 17:49:23,891 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:49:24,048 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-11 17:49:24,474 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 32 proven. 331 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 17:49:24,475 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:49:24,577 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 [2024-10-11 17:49:24,579 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 [2024-10-11 17:49:24,945 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 32 proven. 331 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 17:49:24,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51866920] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:49:24,945 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:49:24,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 30] total 62 [2024-10-11 17:49:24,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108564348] [2024-10-11 17:49:24,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:49:24,946 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2024-10-11 17:49:24,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:49:24,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2024-10-11 17:49:24,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=3595, Unknown=0, NotChecked=0, Total=3782 [2024-10-11 17:49:24,947 INFO L87 Difference]: Start difference. First operand 164 states and 180 transitions. Second operand has 62 states, 62 states have (on average 2.661290322580645) internal successors, (165), 62 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:49:26,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:49:26,399 INFO L93 Difference]: Finished difference Result 298 states and 325 transitions. [2024-10-11 17:49:26,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-10-11 17:49:26,400 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.661290322580645) internal successors, (165), 62 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2024-10-11 17:49:26,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:49:26,400 INFO L225 Difference]: With dead ends: 298 [2024-10-11 17:49:26,400 INFO L226 Difference]: Without dead ends: 170 [2024-10-11 17:49:26,401 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1970 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=342, Invalid=6968, Unknown=0, NotChecked=0, Total=7310 [2024-10-11 17:49:26,402 INFO L432 NwaCegarLoop]: 50 mSDtfsCounter, 103 mSDsluCounter, 1757 mSDsCounter, 0 mSdLazyCounter, 2918 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 1807 SdHoareTripleChecker+Invalid, 2940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 2918 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-10-11 17:49:26,402 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 1807 Invalid, 2940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 2918 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-10-11 17:49:26,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2024-10-11 17:49:26,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 168. [2024-10-11 17:49:26,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 1.1017964071856288) internal successors, (184), 167 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:49:26,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 184 transitions. [2024-10-11 17:49:26,406 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 184 transitions. Word has length 85 [2024-10-11 17:49:26,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:49:26,406 INFO L471 AbstractCegarLoop]: Abstraction has 168 states and 184 transitions. [2024-10-11 17:49:26,407 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.661290322580645) internal successors, (165), 62 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:49:26,407 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 184 transitions. [2024-10-11 17:49:26,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-10-11 17:49:26,407 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:49:26,408 INFO L215 NwaCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:49:26,427 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2024-10-11 17:49:26,608 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2024-10-11 17:49:26,609 INFO L396 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-10-11 17:49:26,609 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:49:26,609 INFO L85 PathProgramCache]: Analyzing trace with hash -428949465, now seen corresponding path program 22 times [2024-10-11 17:49:26,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:49:26,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134463984] [2024-10-11 17:49:26,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:49:26,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:49:26,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:49:27,630 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 110 proven. 276 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 17:49:27,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:49:27,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134463984] [2024-10-11 17:49:27,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134463984] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:49:27,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795660084] [2024-10-11 17:49:27,631 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-11 17:49:27,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:49:27,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:49:27,632 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:49:27,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-10-11 17:49:27,818 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-11 17:49:27,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 17:49:27,821 INFO L255 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 112 conjuncts are in the unsatisfiable core [2024-10-11 17:49:27,823 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:49:28,336 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 132 proven. 254 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 17:49:28,337 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:49:29,025 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2024-10-11 17:49:29,286 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 132 proven. 254 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 17:49:29,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795660084] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:49:29,286 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:49:29,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 62 [2024-10-11 17:49:29,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337670056] [2024-10-11 17:49:29,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:49:29,286 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2024-10-11 17:49:29,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:49:29,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2024-10-11 17:49:29,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=439, Invalid=3467, Unknown=0, NotChecked=0, Total=3906 [2024-10-11 17:49:29,287 INFO L87 Difference]: Start difference. First operand 168 states and 184 transitions. Second operand has 63 states, 62 states have (on average 2.8548387096774195) internal successors, (177), 63 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:49:30,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:49:30,466 INFO L93 Difference]: Finished difference Result 211 states and 228 transitions. [2024-10-11 17:49:30,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-10-11 17:49:30,467 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 62 states have (on average 2.8548387096774195) internal successors, (177), 63 states have internal predecessors, (177), 0 states have call successors, (0), 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 87 [2024-10-11 17:49:30,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:49:30,468 INFO L225 Difference]: With dead ends: 211 [2024-10-11 17:49:30,468 INFO L226 Difference]: Without dead ends: 211 [2024-10-11 17:49:30,469 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 129 SyntacticMatches, 12 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2870 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=785, Invalid=6871, Unknown=0, NotChecked=0, Total=7656 [2024-10-11 17:49:30,469 INFO L432 NwaCegarLoop]: 52 mSDtfsCounter, 347 mSDsluCounter, 926 mSDsCounter, 0 mSdLazyCounter, 1780 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 978 SdHoareTripleChecker+Invalid, 1780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1780 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-11 17:49:30,469 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [347 Valid, 978 Invalid, 1780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1780 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-11 17:49:30,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2024-10-11 17:49:30,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 176. [2024-10-11 17:49:30,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 1.1028571428571428) internal successors, (193), 175 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:49:30,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 193 transitions. [2024-10-11 17:49:30,474 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 193 transitions. Word has length 87 [2024-10-11 17:49:30,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:49:30,474 INFO L471 AbstractCegarLoop]: Abstraction has 176 states and 193 transitions. [2024-10-11 17:49:30,474 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 62 states have (on average 2.8548387096774195) internal successors, (177), 63 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:49:30,474 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 193 transitions. [2024-10-11 17:49:30,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2024-10-11 17:49:30,475 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:49:30,475 INFO L215 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:49:30,493 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2024-10-11 17:49:30,675 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,37 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:49:30,676 INFO L396 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-10-11 17:49:30,676 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:49:30,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1796807253, now seen corresponding path program 23 times [2024-10-11 17:49:30,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:49:30,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789431791] [2024-10-11 17:49:30,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:49:30,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:49:30,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:49:31,797 INFO L134 CoverageAnalysis]: Checked inductivity of 436 backedges. 35 proven. 397 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 17:49:31,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:49:31,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789431791] [2024-10-11 17:49:31,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789431791] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:49:31,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606469625] [2024-10-11 17:49:31,798 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-11 17:49:31,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:49:31,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:49:31,799 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:49:31,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-10-11 17:49:32,033 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2024-10-11 17:49:32,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 17:49:32,037 INFO L255 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 134 conjuncts are in the unsatisfiable core [2024-10-11 17:49:32,039 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:49:32,376 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 [2024-10-11 17:49:32,506 INFO L134 CoverageAnalysis]: Checked inductivity of 436 backedges. 35 proven. 397 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 17:49:32,507 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:49:32,575 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 [2024-10-11 17:49:32,576 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 [2024-10-11 17:49:32,666 INFO L134 CoverageAnalysis]: Checked inductivity of 436 backedges. 35 proven. 397 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 17:49:32,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606469625] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:49:32,666 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:49:32,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 32, 32] total 53 [2024-10-11 17:49:32,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242434802] [2024-10-11 17:49:32,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:49:32,667 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2024-10-11 17:49:32,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:49:32,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2024-10-11 17:49:32,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=2606, Unknown=0, NotChecked=0, Total=2756 [2024-10-11 17:49:32,668 INFO L87 Difference]: Start difference. First operand 176 states and 193 transitions. Second operand has 53 states, 53 states have (on average 2.452830188679245) internal successors, (130), 53 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:49:34,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:49:34,284 INFO L93 Difference]: Finished difference Result 321 states and 350 transitions. [2024-10-11 17:49:34,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-10-11 17:49:34,284 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.452830188679245) internal successors, (130), 53 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2024-10-11 17:49:34,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:49:34,285 INFO L225 Difference]: With dead ends: 321 [2024-10-11 17:49:34,285 INFO L226 Difference]: Without dead ends: 182 [2024-10-11 17:49:34,286 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1450 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=329, Invalid=6313, Unknown=0, NotChecked=0, Total=6642 [2024-10-11 17:49:34,286 INFO L432 NwaCegarLoop]: 54 mSDtfsCounter, 161 mSDsluCounter, 1743 mSDsCounter, 0 mSdLazyCounter, 2920 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 1797 SdHoareTripleChecker+Invalid, 2944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 2920 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-10-11 17:49:34,286 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 1797 Invalid, 2944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 2920 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-10-11 17:49:34,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2024-10-11 17:49:34,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 180. [2024-10-11 17:49:34,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 1.100558659217877) internal successors, (197), 179 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:49:34,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 197 transitions. [2024-10-11 17:49:34,289 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 197 transitions. Word has length 91 [2024-10-11 17:49:34,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:49:34,290 INFO L471 AbstractCegarLoop]: Abstraction has 180 states and 197 transitions. [2024-10-11 17:49:34,290 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.452830188679245) internal successors, (130), 53 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:49:34,290 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 197 transitions. [2024-10-11 17:49:34,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2024-10-11 17:49:34,290 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:49:34,291 INFO L215 NwaCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:49:34,310 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2024-10-11 17:49:34,491 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2024-10-11 17:49:34,492 INFO L396 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2024-10-11 17:49:34,492 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:49:34,492 INFO L85 PathProgramCache]: Analyzing trace with hash 930098534, now seen corresponding path program 24 times [2024-10-11 17:49:34,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:49:34,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111099058] [2024-10-11 17:49:34,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:49:34,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:49:34,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:49:35,567 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 132 proven. 325 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 17:49:35,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:49:35,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111099058] [2024-10-11 17:49:35,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111099058] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:49:35,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673941967] [2024-10-11 17:49:35,568 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-11 17:49:35,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:49:35,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:49:35,569 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:49:35,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-10-11 17:49:36,166 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2024-10-11 17:49:36,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 17:49:36,171 INFO L255 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 102 conjuncts are in the unsatisfiable core [2024-10-11 17:49:36,173 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:49:36,996 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 144 proven. 313 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 17:49:36,996 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:49:37,739 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2024-10-11 17:49:38,057 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 144 proven. 313 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 17:49:38,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673941967] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:49:38,057 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:49:38,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 78 [2024-10-11 17:49:38,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989846762] [2024-10-11 17:49:38,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:49:38,058 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2024-10-11 17:49:38,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:49:38,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2024-10-11 17:49:38,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=844, Invalid=5318, Unknown=0, NotChecked=0, Total=6162 [2024-10-11 17:49:38,059 INFO L87 Difference]: Start difference. First operand 180 states and 197 transitions. Second operand has 79 states, 78 states have (on average 2.9871794871794872) internal successors, (233), 79 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)