./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/valid-memsafety.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version fca748b1 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 13ad8bc9cfa3954c0bae4db0509cb11733a45600a9e4ff56ca5bdd4aceeb1fc0 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dd.update-z3-fca748b-m [2024-11-20 14:41:49,340 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-20 14:41:49,411 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-20 14:41:49,415 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-20 14:41:49,416 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-20 14:41:49,446 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-20 14:41:49,447 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-20 14:41:49,447 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-20 14:41:49,448 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-20 14:41:49,448 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-20 14:41:49,448 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-20 14:41:49,449 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-20 14:41:49,449 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-20 14:41:49,450 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-20 14:41:49,450 INFO L153 SettingsManager]: * Use SBE=true [2024-11-20 14:41:49,452 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-20 14:41:49,454 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-20 14:41:49,455 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-20 14:41:49,455 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-20 14:41:49,455 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-20 14:41:49,455 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-20 14:41:49,456 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-20 14:41:49,459 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-20 14:41:49,459 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-20 14:41:49,459 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-20 14:41:49,460 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-20 14:41:49,460 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-20 14:41:49,460 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-20 14:41:49,461 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-20 14:41:49,461 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-20 14:41:49,461 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-20 14:41:49,461 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-20 14:41:49,462 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-20 14:41:49,462 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-20 14:41:49,462 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-20 14:41:49,463 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-20 14:41:49,463 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-20 14:41:49,463 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-20 14:41:49,463 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-20 14:41:49,464 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-20 14:41:49,464 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-20 14:41:49,465 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-20 14:41:49,465 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 13ad8bc9cfa3954c0bae4db0509cb11733a45600a9e4ff56ca5bdd4aceeb1fc0 [2024-11-20 14:41:49,725 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-20 14:41:49,749 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-20 14:41:49,752 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-20 14:41:49,753 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-20 14:41:49,754 INFO L274 PluginConnector]: CDTParser initialized [2024-11-20 14:41:49,755 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength2.c [2024-11-20 14:41:51,188 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-20 14:41:51,380 INFO L384 CDTParser]: Found 1 translation units. [2024-11-20 14:41:51,382 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength2.c [2024-11-20 14:41:51,390 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b8623cca9/9552c52a1b7a4748a4ad2713e3d26d20/FLAG3cef4de96 [2024-11-20 14:41:51,402 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b8623cca9/9552c52a1b7a4748a4ad2713e3d26d20 [2024-11-20 14:41:51,405 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-20 14:41:51,406 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-20 14:41:51,407 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-20 14:41:51,407 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-20 14:41:51,414 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-20 14:41:51,415 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 02:41:51" (1/1) ... [2024-11-20 14:41:51,418 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1cf6bffb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:41:51, skipping insertion in model container [2024-11-20 14:41:51,418 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 02:41:51" (1/1) ... [2024-11-20 14:41:51,440 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-20 14:41:51,627 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-20 14:41:51,638 INFO L200 MainTranslator]: Completed pre-run [2024-11-20 14:41:51,652 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-20 14:41:51,667 INFO L204 MainTranslator]: Completed translation [2024-11-20 14:41:51,667 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:41:51 WrapperNode [2024-11-20 14:41:51,667 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-20 14:41:51,668 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-20 14:41:51,668 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-20 14:41:51,668 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-20 14:41:51,675 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:41:51" (1/1) ... [2024-11-20 14:41:51,681 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:41:51" (1/1) ... [2024-11-20 14:41:51,697 INFO L138 Inliner]: procedures = 9, calls = 17, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 86 [2024-11-20 14:41:51,697 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-20 14:41:51,698 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-20 14:41:51,698 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-20 14:41:51,698 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-20 14:41:51,711 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:41:51" (1/1) ... [2024-11-20 14:41:51,711 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:41:51" (1/1) ... [2024-11-20 14:41:51,716 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:41:51" (1/1) ... [2024-11-20 14:41:51,728 INFO L175 MemorySlicer]: Split 5 memory accesses to 2 slices as follows [2, 3]. 60 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0, 0]. The 2 writes are split as follows [1, 1]. [2024-11-20 14:41:51,729 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:41:51" (1/1) ... [2024-11-20 14:41:51,729 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:41:51" (1/1) ... [2024-11-20 14:41:51,734 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:41:51" (1/1) ... [2024-11-20 14:41:51,737 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:41:51" (1/1) ... [2024-11-20 14:41:51,738 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:41:51" (1/1) ... [2024-11-20 14:41:51,739 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:41:51" (1/1) ... [2024-11-20 14:41:51,741 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-20 14:41:51,745 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-20 14:41:51,745 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-20 14:41:51,745 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-20 14:41:51,746 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:41:51" (1/1) ... [2024-11-20 14:41:51,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-20 14:41:51,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:41:51,777 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-20 14:41:51,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-20 14:41:51,827 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-20 14:41:51,828 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-20 14:41:51,828 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-20 14:41:51,828 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-20 14:41:51,828 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-20 14:41:51,828 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-20 14:41:51,828 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-20 14:41:51,829 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-20 14:41:51,898 INFO L238 CfgBuilder]: Building ICFG [2024-11-20 14:41:51,900 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-20 14:41:52,180 INFO L? ?]: Removed 45 outVars from TransFormulas that were not future-live. [2024-11-20 14:41:52,180 INFO L287 CfgBuilder]: Performing block encoding [2024-11-20 14:41:52,191 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-20 14:41:52,192 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-20 14:41:52,192 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 02:41:52 BoogieIcfgContainer [2024-11-20 14:41:52,192 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-20 14:41:52,194 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-20 14:41:52,194 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-20 14:41:52,197 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-20 14:41:52,198 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 02:41:51" (1/3) ... [2024-11-20 14:41:52,198 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f9e898f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 02:41:52, skipping insertion in model container [2024-11-20 14:41:52,198 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:41:51" (2/3) ... [2024-11-20 14:41:52,199 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f9e898f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 02:41:52, skipping insertion in model container [2024-11-20 14:41:52,199 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 02:41:52" (3/3) ... [2024-11-20 14:41:52,200 INFO L112 eAbstractionObserver]: Analyzing ICFG ArraysOfVariableLength2.c [2024-11-20 14:41:52,218 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-20 14:41:52,218 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2024-11-20 14:41:52,282 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-20 14:41:52,289 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;@38aade54, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-20 14:41:52,290 INFO L334 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2024-11-20 14:41:52,294 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 28 states have (on average 1.75) internal successors, (49), 39 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:41:52,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-11-20 14:41:52,299 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:41:52,299 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-11-20 14:41:52,300 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-20 14:41:52,304 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:41:52,305 INFO L85 PathProgramCache]: Analyzing trace with hash 28698921, now seen corresponding path program 1 times [2024-11-20 14:41:52,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:41:52,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445074696] [2024-11-20 14:41:52,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:41:52,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:41:52,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:41:52,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:41:52,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:41:52,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445074696] [2024-11-20 14:41:52,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445074696] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 14:41:52,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 14:41:52,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-20 14:41:52,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722201955] [2024-11-20 14:41:52,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 14:41:52,619 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 14:41:52,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:41:52,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 14:41:52,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 14:41:52,644 INFO L87 Difference]: Start difference. First operand has 40 states, 28 states have (on average 1.75) internal successors, (49), 39 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:41:52,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:41:52,743 INFO L93 Difference]: Finished difference Result 56 states and 63 transitions. [2024-11-20 14:41:52,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 14:41:52,746 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2024-11-20 14:41:52,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:41:52,753 INFO L225 Difference]: With dead ends: 56 [2024-11-20 14:41:52,753 INFO L226 Difference]: Without dead ends: 54 [2024-11-20 14:41:52,755 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-20 14:41:52,760 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 33 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-20 14:41:52,761 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 82 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-20 14:41:52,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-11-20 14:41:52,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 39. [2024-11-20 14:41:52,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 38 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:41:52,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2024-11-20 14:41:52,796 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 5 [2024-11-20 14:41:52,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:41:52,796 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2024-11-20 14:41:52,796 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:41:52,796 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2024-11-20 14:41:52,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-20 14:41:52,797 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:41:52,797 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:41:52,797 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-20 14:41:52,797 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-20 14:41:52,798 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:41:52,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1809811544, now seen corresponding path program 1 times [2024-11-20 14:41:52,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:41:52,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787362812] [2024-11-20 14:41:52,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:41:52,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:41:52,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:41:52,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:41:52,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:41:52,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787362812] [2024-11-20 14:41:52,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787362812] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 14:41:52,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 14:41:52,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-20 14:41:52,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708951974] [2024-11-20 14:41:52,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 14:41:52,947 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 14:41:52,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:41:52,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 14:41:52,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-20 14:41:52,948 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:41:53,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:41:53,043 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2024-11-20 14:41:53,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 14:41:53,044 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-20 14:41:53,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:41:53,045 INFO L225 Difference]: With dead ends: 50 [2024-11-20 14:41:53,045 INFO L226 Difference]: Without dead ends: 50 [2024-11-20 14:41:53,045 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-11-20 14:41:53,046 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 21 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-20 14:41:53,047 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 108 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-20 14:41:53,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-11-20 14:41:53,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 41. [2024-11-20 14:41:53,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 30 states have (on average 1.5) internal successors, (45), 40 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) [2024-11-20 14:41:53,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2024-11-20 14:41:53,052 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 7 [2024-11-20 14:41:53,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:41:53,052 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2024-11-20 14:41:53,053 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:41:53,053 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2024-11-20 14:41:53,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-20 14:41:53,053 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:41:53,053 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:41:53,054 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-20 14:41:53,054 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-20 14:41:53,054 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:41:53,055 INFO L85 PathProgramCache]: Analyzing trace with hash -489510905, now seen corresponding path program 1 times [2024-11-20 14:41:53,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:41:53,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571854325] [2024-11-20 14:41:53,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:41:53,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:41:53,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:41:53,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:41:53,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:41:53,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571854325] [2024-11-20 14:41:53,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571854325] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 14:41:53,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 14:41:53,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-20 14:41:53,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230279954] [2024-11-20 14:41:53,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 14:41:53,163 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 14:41:53,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:41:53,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 14:41:53,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-20 14:41:53,164 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:41:53,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:41:53,198 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2024-11-20 14:41:53,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 14:41:53,199 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-11-20 14:41:53,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:41:53,201 INFO L225 Difference]: With dead ends: 49 [2024-11-20 14:41:53,201 INFO L226 Difference]: Without dead ends: 49 [2024-11-20 14:41:53,202 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-20 14:41:53,203 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 4 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-20 14:41:53,203 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 143 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-20 14:41:53,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-11-20 14:41:53,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2024-11-20 14:41:53,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 34 states have (on average 1.4705882352941178) internal successors, (50), 44 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:41:53,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2024-11-20 14:41:53,208 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 11 [2024-11-20 14:41:53,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:41:53,209 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2024-11-20 14:41:53,209 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:41:53,209 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2024-11-20 14:41:53,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-20 14:41:53,210 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:41:53,210 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:41:53,210 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-20 14:41:53,210 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-20 14:41:53,211 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:41:53,211 INFO L85 PathProgramCache]: Analyzing trace with hash -489508983, now seen corresponding path program 1 times [2024-11-20 14:41:53,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:41:53,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400035093] [2024-11-20 14:41:53,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:41:53,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:41:53,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:41:53,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:41:53,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:41:53,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400035093] [2024-11-20 14:41:53,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400035093] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 14:41:53,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 14:41:53,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-20 14:41:53,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230726061] [2024-11-20 14:41:53,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 14:41:53,390 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 14:41:53,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:41:53,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 14:41:53,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-20 14:41:53,395 INFO L87 Difference]: Start difference. First operand 45 states and 50 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:41:53,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:41:53,451 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2024-11-20 14:41:53,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 14:41:53,452 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-11-20 14:41:53,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:41:53,453 INFO L225 Difference]: With dead ends: 43 [2024-11-20 14:41:53,453 INFO L226 Difference]: Without dead ends: 43 [2024-11-20 14:41:53,453 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-20 14:41:53,454 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 24 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-20 14:41:53,454 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 30 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-20 14:41:53,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-11-20 14:41:53,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2024-11-20 14:41:53,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 34 states have (on average 1.411764705882353) internal successors, (48), 42 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) [2024-11-20 14:41:53,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2024-11-20 14:41:53,463 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 11 [2024-11-20 14:41:53,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:41:53,463 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2024-11-20 14:41:53,464 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:41:53,464 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2024-11-20 14:41:53,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-20 14:41:53,464 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:41:53,465 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:41:53,465 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-20 14:41:53,465 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-20 14:41:53,466 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:41:53,466 INFO L85 PathProgramCache]: Analyzing trace with hash -489508982, now seen corresponding path program 1 times [2024-11-20 14:41:53,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:41:53,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48115491] [2024-11-20 14:41:53,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:41:53,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:41:53,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:41:53,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:41:53,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:41:53,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48115491] [2024-11-20 14:41:53,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48115491] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 14:41:53,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 14:41:53,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-20 14:41:53,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495051659] [2024-11-20 14:41:53,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 14:41:53,685 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 14:41:53,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:41:53,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 14:41:53,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-20 14:41:53,686 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:41:53,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:41:53,785 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2024-11-20 14:41:53,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 14:41:53,785 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-11-20 14:41:53,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:41:53,787 INFO L225 Difference]: With dead ends: 50 [2024-11-20 14:41:53,787 INFO L226 Difference]: Without dead ends: 50 [2024-11-20 14:41:53,790 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-11-20 14:41:53,791 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 8 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-20 14:41:53,791 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 68 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-20 14:41:53,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-11-20 14:41:53,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2024-11-20 14:41:53,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 39 states have (on average 1.358974358974359) internal successors, (53), 47 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) [2024-11-20 14:41:53,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2024-11-20 14:41:53,800 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 11 [2024-11-20 14:41:53,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:41:53,801 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2024-11-20 14:41:53,801 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:41:53,801 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2024-11-20 14:41:53,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-20 14:41:53,801 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:41:53,802 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:41:53,802 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-20 14:41:53,802 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-20 14:41:53,803 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:41:53,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1675839934, now seen corresponding path program 1 times [2024-11-20 14:41:53,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:41:53,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029205910] [2024-11-20 14:41:53,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:41:53,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:41:53,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:41:53,899 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:41:53,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:41:53,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029205910] [2024-11-20 14:41:53,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029205910] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 14:41:53,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 14:41:53,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-20 14:41:53,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103285297] [2024-11-20 14:41:53,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 14:41:53,902 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 14:41:53,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:41:53,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 14:41:53,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 14:41:53,904 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:41:53,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:41:53,944 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2024-11-20 14:41:53,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 14:41:53,945 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2024-11-20 14:41:53,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:41:53,946 INFO L225 Difference]: With dead ends: 47 [2024-11-20 14:41:53,946 INFO L226 Difference]: Without dead ends: 47 [2024-11-20 14:41:53,946 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-20 14:41:53,950 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 42 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-20 14:41:53,951 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 35 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-20 14:41:53,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-11-20 14:41:53,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2024-11-20 14:41:53,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 46 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:41:53,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 52 transitions. [2024-11-20 14:41:53,959 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 52 transitions. Word has length 16 [2024-11-20 14:41:53,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:41:53,959 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 52 transitions. [2024-11-20 14:41:53,959 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:41:53,960 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 52 transitions. [2024-11-20 14:41:53,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-20 14:41:53,960 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:41:53,961 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:41:53,961 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-20 14:41:53,961 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-20 14:41:53,963 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:41:53,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1675839933, now seen corresponding path program 1 times [2024-11-20 14:41:53,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:41:53,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893031258] [2024-11-20 14:41:53,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:41:53,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:41:53,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:41:54,134 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:41:54,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:41:54,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893031258] [2024-11-20 14:41:54,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893031258] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:41:54,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729091168] [2024-11-20 14:41:54,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:41:54,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:41:54,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:41:54,140 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 14:41:54,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-20 14:41:54,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:41:54,234 INFO L255 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-20 14:41:54,239 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 14:41:54,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-20 14:41:54,425 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-20 14:41:54,441 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-20 14:41:54,442 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-20 14:41:54,470 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:41:54,471 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 14:41:54,696 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 52 treesize of output 48 [2024-11-20 14:41:54,723 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 14:41:54,724 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 64 [2024-11-20 14:41:54,816 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:41:54,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729091168] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 14:41:54,817 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 14:41:54,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 10 [2024-11-20 14:41:54,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690387613] [2024-11-20 14:41:54,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 14:41:54,818 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-20 14:41:54,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:41:54,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-20 14:41:54,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-11-20 14:41:54,819 INFO L87 Difference]: Start difference. First operand 47 states and 52 transitions. Second operand has 11 states, 10 states have (on average 3.7) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:41:55,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:41:55,161 INFO L93 Difference]: Finished difference Result 119 states and 140 transitions. [2024-11-20 14:41:55,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-20 14:41:55,161 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.7) internal successors, (37), 11 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 16 [2024-11-20 14:41:55,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:41:55,163 INFO L225 Difference]: With dead ends: 119 [2024-11-20 14:41:55,164 INFO L226 Difference]: Without dead ends: 119 [2024-11-20 14:41:55,165 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=119, Invalid=261, Unknown=0, NotChecked=0, Total=380 [2024-11-20 14:41:55,166 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 268 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-20 14:41:55,168 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [268 Valid, 82 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-20 14:41:55,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2024-11-20 14:41:55,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 56. [2024-11-20 14:41:55,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 48 states have (on average 1.3333333333333333) internal successors, (64), 55 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:41:55,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 64 transitions. [2024-11-20 14:41:55,177 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 64 transitions. Word has length 16 [2024-11-20 14:41:55,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:41:55,177 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 64 transitions. [2024-11-20 14:41:55,177 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.7) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:41:55,177 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 64 transitions. [2024-11-20 14:41:55,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-20 14:41:55,178 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:41:55,178 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:41:55,187 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-20 14:41:55,379 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:41:55,380 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-20 14:41:55,380 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:41:55,381 INFO L85 PathProgramCache]: Analyzing trace with hash -411430410, now seen corresponding path program 1 times [2024-11-20 14:41:55,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:41:55,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474471766] [2024-11-20 14:41:55,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:41:55,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:41:55,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:41:55,451 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 14:41:55,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:41:55,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474471766] [2024-11-20 14:41:55,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474471766] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 14:41:55,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 14:41:55,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-20 14:41:55,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13428908] [2024-11-20 14:41:55,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 14:41:55,453 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 14:41:55,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:41:55,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 14:41:55,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 14:41:55,454 INFO L87 Difference]: Start difference. First operand 56 states and 64 transitions. Second operand has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:41:55,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:41:55,474 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2024-11-20 14:41:55,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 14:41:55,474 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2024-11-20 14:41:55,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:41:55,475 INFO L225 Difference]: With dead ends: 55 [2024-11-20 14:41:55,477 INFO L226 Difference]: Without dead ends: 55 [2024-11-20 14:41:55,478 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 14:41:55,478 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 15 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 38 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 [2024-11-20 14:41:55,479 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 38 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-20 14:41:55,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-11-20 14:41:55,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2024-11-20 14:41:55,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 48 states have (on average 1.3125) internal successors, (63), 54 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:41:55,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2024-11-20 14:41:55,485 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 17 [2024-11-20 14:41:55,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:41:55,486 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2024-11-20 14:41:55,486 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:41:55,487 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2024-11-20 14:41:55,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-20 14:41:55,487 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:41:55,487 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:41:55,488 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-20 14:41:55,488 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-20 14:41:55,488 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:41:55,490 INFO L85 PathProgramCache]: Analyzing trace with hash -411430409, now seen corresponding path program 1 times [2024-11-20 14:41:55,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:41:55,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582487787] [2024-11-20 14:41:55,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:41:55,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:41:55,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:41:55,654 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:41:55,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:41:55,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582487787] [2024-11-20 14:41:55,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582487787] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:41:55,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673109583] [2024-11-20 14:41:55,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:41:55,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:41:55,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:41:55,658 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 14:41:55,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-20 14:41:55,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:41:55,724 INFO L255 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-20 14:41:55,726 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 14:41:55,754 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-20 14:41:55,772 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:41:55,772 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 14:41:55,850 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:41:55,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673109583] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 14:41:55,850 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 14:41:55,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-11-20 14:41:55,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752288796] [2024-11-20 14:41:55,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 14:41:55,851 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-20 14:41:55,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:41:55,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-20 14:41:55,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-20 14:41:55,852 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:41:56,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:41:56,097 INFO L93 Difference]: Finished difference Result 146 states and 172 transitions. [2024-11-20 14:41:56,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-20 14:41:56,097 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 8 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 17 [2024-11-20 14:41:56,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:41:56,098 INFO L225 Difference]: With dead ends: 146 [2024-11-20 14:41:56,098 INFO L226 Difference]: Without dead ends: 146 [2024-11-20 14:41:56,099 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2024-11-20 14:41:56,099 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 178 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-20 14:41:56,099 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 140 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-20 14:41:56,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2024-11-20 14:41:56,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 104. [2024-11-20 14:41:56,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 97 states have (on average 1.3711340206185567) internal successors, (133), 103 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:41:56,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 133 transitions. [2024-11-20 14:41:56,110 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 133 transitions. Word has length 17 [2024-11-20 14:41:56,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:41:56,110 INFO L471 AbstractCegarLoop]: Abstraction has 104 states and 133 transitions. [2024-11-20 14:41:56,110 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:41:56,111 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 133 transitions. [2024-11-20 14:41:56,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-20 14:41:56,111 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:41:56,111 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:41:56,120 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-20 14:41:56,315 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-11-20 14:41:56,316 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-20 14:41:56,316 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:41:56,316 INFO L85 PathProgramCache]: Analyzing trace with hash 130511665, now seen corresponding path program 1 times [2024-11-20 14:41:56,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:41:56,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645627202] [2024-11-20 14:41:56,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:41:56,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:41:56,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:41:56,365 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 14:41:56,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:41:56,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645627202] [2024-11-20 14:41:56,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645627202] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 14:41:56,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 14:41:56,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-20 14:41:56,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613710205] [2024-11-20 14:41:56,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 14:41:56,367 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 14:41:56,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:41:56,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 14:41:56,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 14:41:56,368 INFO L87 Difference]: Start difference. First operand 104 states and 133 transitions. Second operand has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:41:56,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:41:56,402 INFO L93 Difference]: Finished difference Result 103 states and 130 transitions. [2024-11-20 14:41:56,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 14:41:56,403 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2024-11-20 14:41:56,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:41:56,404 INFO L225 Difference]: With dead ends: 103 [2024-11-20 14:41:56,404 INFO L226 Difference]: Without dead ends: 103 [2024-11-20 14:41:56,404 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-20 14:41:56,404 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 20 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-20 14:41:56,405 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 52 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-20 14:41:56,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2024-11-20 14:41:56,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2024-11-20 14:41:56,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 97 states have (on average 1.3402061855670102) internal successors, (130), 102 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:41:56,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 130 transitions. [2024-11-20 14:41:56,418 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 130 transitions. Word has length 18 [2024-11-20 14:41:56,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:41:56,418 INFO L471 AbstractCegarLoop]: Abstraction has 103 states and 130 transitions. [2024-11-20 14:41:56,418 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:41:56,418 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 130 transitions. [2024-11-20 14:41:56,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-20 14:41:56,419 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:41:56,419 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:41:56,419 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-20 14:41:56,419 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-20 14:41:56,420 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:41:56,420 INFO L85 PathProgramCache]: Analyzing trace with hash 130511666, now seen corresponding path program 1 times [2024-11-20 14:41:56,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:41:56,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080089846] [2024-11-20 14:41:56,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:41:56,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:41:56,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:41:56,502 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:41:56,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:41:56,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080089846] [2024-11-20 14:41:56,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080089846] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:41:56,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652940499] [2024-11-20 14:41:56,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:41:56,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:41:56,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:41:56,507 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 14:41:56,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-20 14:41:56,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:41:56,581 INFO L255 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-20 14:41:56,582 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 14:41:56,619 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:41:56,621 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 14:41:56,660 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:41:56,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652940499] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 14:41:56,661 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 14:41:56,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2024-11-20 14:41:56,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485125471] [2024-11-20 14:41:56,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 14:41:56,661 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-20 14:41:56,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:41:56,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-20 14:41:56,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-11-20 14:41:56,662 INFO L87 Difference]: Start difference. First operand 103 states and 130 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:41:56,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:41:56,741 INFO L93 Difference]: Finished difference Result 110 states and 134 transitions. [2024-11-20 14:41:56,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-20 14:41:56,741 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2024-11-20 14:41:56,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:41:56,742 INFO L225 Difference]: With dead ends: 110 [2024-11-20 14:41:56,742 INFO L226 Difference]: Without dead ends: 110 [2024-11-20 14:41:56,742 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-11-20 14:41:56,743 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 63 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-20 14:41:56,743 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 74 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-20 14:41:56,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2024-11-20 14:41:56,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 103. [2024-11-20 14:41:56,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 97 states have (on average 1.2989690721649485) internal successors, (126), 102 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:41:56,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 126 transitions. [2024-11-20 14:41:56,749 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 126 transitions. Word has length 18 [2024-11-20 14:41:56,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:41:56,750 INFO L471 AbstractCegarLoop]: Abstraction has 103 states and 126 transitions. [2024-11-20 14:41:56,750 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:41:56,750 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 126 transitions. [2024-11-20 14:41:56,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-20 14:41:56,756 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:41:56,756 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:41:56,765 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-20 14:41:56,957 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:41:56,957 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-20 14:41:56,958 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:41:56,958 INFO L85 PathProgramCache]: Analyzing trace with hash -1752050598, now seen corresponding path program 1 times [2024-11-20 14:41:56,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:41:56,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94754553] [2024-11-20 14:41:56,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:41:56,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:41:56,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:41:57,049 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:41:57,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:41:57,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94754553] [2024-11-20 14:41:57,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94754553] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:41:57,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060375157] [2024-11-20 14:41:57,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:41:57,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:41:57,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:41:57,053 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 14:41:57,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-20 14:41:57,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:41:57,125 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-20 14:41:57,129 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 14:41:57,193 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:41:57,194 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 14:41:57,263 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 14:41:57,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060375157] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 14:41:57,264 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 14:41:57,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2024-11-20 14:41:57,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611210785] [2024-11-20 14:41:57,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 14:41:57,266 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-20 14:41:57,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:41:57,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-20 14:41:57,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-11-20 14:41:57,267 INFO L87 Difference]: Start difference. First operand 103 states and 126 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 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) [2024-11-20 14:41:57,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:41:57,386 INFO L93 Difference]: Finished difference Result 102 states and 121 transitions. [2024-11-20 14:41:57,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-20 14:41:57,386 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 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) Word has length 21 [2024-11-20 14:41:57,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:41:57,387 INFO L225 Difference]: With dead ends: 102 [2024-11-20 14:41:57,387 INFO L226 Difference]: Without dead ends: 102 [2024-11-20 14:41:57,387 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2024-11-20 14:41:57,388 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 56 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-20 14:41:57,388 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 123 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-20 14:41:57,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2024-11-20 14:41:57,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2024-11-20 14:41:57,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 95 states have (on average 1.2736842105263158) internal successors, (121), 100 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:41:57,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 121 transitions. [2024-11-20 14:41:57,392 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 121 transitions. Word has length 21 [2024-11-20 14:41:57,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:41:57,392 INFO L471 AbstractCegarLoop]: Abstraction has 101 states and 121 transitions. [2024-11-20 14:41:57,392 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 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) [2024-11-20 14:41:57,392 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 121 transitions. [2024-11-20 14:41:57,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-20 14:41:57,392 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:41:57,393 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] [2024-11-20 14:41:57,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-20 14:41:57,593 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:41:57,594 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-20 14:41:57,594 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:41:57,594 INFO L85 PathProgramCache]: Analyzing trace with hash -93493367, now seen corresponding path program 1 times [2024-11-20 14:41:57,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:41:57,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515821110] [2024-11-20 14:41:57,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:41:57,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:41:57,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:41:57,726 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 14:41:57,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:41:57,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515821110] [2024-11-20 14:41:57,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515821110] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:41:57,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730063835] [2024-11-20 14:41:57,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:41:57,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:41:57,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:41:57,730 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 14:41:57,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-20 14:41:57,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:41:57,805 INFO L255 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-20 14:41:57,807 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 14:41:57,821 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-20 14:41:57,881 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 14:41:57,882 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 14:41:57,960 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 14:41:57,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730063835] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-20 14:41:57,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-20 14:41:57,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 10 [2024-11-20 14:41:57,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982574196] [2024-11-20 14:41:57,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 14:41:57,961 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 14:41:57,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:41:57,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 14:41:57,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-11-20 14:41:57,962 INFO L87 Difference]: Start difference. First operand 101 states and 121 transitions. Second operand has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:41:58,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:41:58,011 INFO L93 Difference]: Finished difference Result 105 states and 126 transitions. [2024-11-20 14:41:58,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 14:41:58,011 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2024-11-20 14:41:58,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:41:58,012 INFO L225 Difference]: With dead ends: 105 [2024-11-20 14:41:58,012 INFO L226 Difference]: Without dead ends: 105 [2024-11-20 14:41:58,012 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-11-20 14:41:58,013 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 7 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-20 14:41:58,013 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 60 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-20 14:41:58,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2024-11-20 14:41:58,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2024-11-20 14:41:58,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 98 states have (on average 1.2653061224489797) internal successors, (124), 103 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:41:58,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 124 transitions. [2024-11-20 14:41:58,016 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 124 transitions. Word has length 23 [2024-11-20 14:41:58,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:41:58,016 INFO L471 AbstractCegarLoop]: Abstraction has 104 states and 124 transitions. [2024-11-20 14:41:58,016 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:41:58,017 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 124 transitions. [2024-11-20 14:41:58,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-20 14:41:58,017 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:41:58,017 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:41:58,026 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-20 14:41:58,218 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-20 14:41:58,219 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-20 14:41:58,219 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:41:58,219 INFO L85 PathProgramCache]: Analyzing trace with hash -1409452358, now seen corresponding path program 1 times [2024-11-20 14:41:58,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:41:58,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077102176] [2024-11-20 14:41:58,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:41:58,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:41:58,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:41:58,356 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 14:41:58,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:41:58,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077102176] [2024-11-20 14:41:58,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077102176] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:41:58,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942822811] [2024-11-20 14:41:58,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:41:58,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:41:58,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:41:58,359 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 14:41:58,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-20 14:41:58,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:41:58,437 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-20 14:41:58,438 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 14:41:58,509 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 14:41:58,510 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 14:41:58,563 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 14:41:58,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942822811] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 14:41:58,563 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 14:41:58,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2024-11-20 14:41:58,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531653200] [2024-11-20 14:41:58,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 14:41:58,564 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-20 14:41:58,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:41:58,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-20 14:41:58,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-11-20 14:41:58,565 INFO L87 Difference]: Start difference. First operand 104 states and 124 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:41:58,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:41:58,644 INFO L93 Difference]: Finished difference Result 104 states and 121 transitions. [2024-11-20 14:41:58,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-20 14:41:58,644 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2024-11-20 14:41:58,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:41:58,645 INFO L225 Difference]: With dead ends: 104 [2024-11-20 14:41:58,645 INFO L226 Difference]: Without dead ends: 104 [2024-11-20 14:41:58,646 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2024-11-20 14:41:58,646 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 81 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-20 14:41:58,646 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 85 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-20 14:41:58,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2024-11-20 14:41:58,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 95. [2024-11-20 14:41:58,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 89 states have (on average 1.2584269662921348) internal successors, (112), 94 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:41:58,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 112 transitions. [2024-11-20 14:41:58,649 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 112 transitions. Word has length 27 [2024-11-20 14:41:58,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:41:58,650 INFO L471 AbstractCegarLoop]: Abstraction has 95 states and 112 transitions. [2024-11-20 14:41:58,650 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:41:58,650 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 112 transitions. [2024-11-20 14:41:58,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-20 14:41:58,650 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:41:58,651 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:41:58,664 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-20 14:41:58,851 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:41:58,852 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-20 14:41:58,852 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:41:58,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1360755252, now seen corresponding path program 1 times [2024-11-20 14:41:58,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:41:58,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120630168] [2024-11-20 14:41:58,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:41:58,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:41:58,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:41:58,973 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 14:41:58,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:41:58,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120630168] [2024-11-20 14:41:58,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120630168] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:41:58,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343910592] [2024-11-20 14:41:58,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:41:58,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:41:58,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:41:58,977 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 14:41:58,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-20 14:41:59,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:41:59,057 INFO L255 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-20 14:41:59,059 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 14:41:59,129 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 14:41:59,130 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 14:41:59,185 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 14:41:59,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343910592] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 14:41:59,186 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 14:41:59,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-11-20 14:41:59,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689047787] [2024-11-20 14:41:59,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 14:41:59,186 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-20 14:41:59,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:41:59,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-20 14:41:59,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-11-20 14:41:59,187 INFO L87 Difference]: Start difference. First operand 95 states and 112 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:41:59,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:41:59,296 INFO L93 Difference]: Finished difference Result 95 states and 110 transitions. [2024-11-20 14:41:59,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-20 14:41:59,296 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2024-11-20 14:41:59,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:41:59,297 INFO L225 Difference]: With dead ends: 95 [2024-11-20 14:41:59,297 INFO L226 Difference]: Without dead ends: 95 [2024-11-20 14:41:59,298 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2024-11-20 14:41:59,298 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 40 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-20 14:41:59,299 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 116 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-20 14:41:59,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-11-20 14:41:59,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2024-11-20 14:41:59,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 88 states have (on average 1.2386363636363635) internal successors, (109), 93 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:41:59,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 109 transitions. [2024-11-20 14:41:59,301 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 109 transitions. Word has length 27 [2024-11-20 14:41:59,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:41:59,301 INFO L471 AbstractCegarLoop]: Abstraction has 94 states and 109 transitions. [2024-11-20 14:41:59,301 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:41:59,301 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 109 transitions. [2024-11-20 14:41:59,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-20 14:41:59,302 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:41:59,302 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:41:59,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-20 14:41:59,502 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:41:59,503 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-20 14:41:59,503 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:41:59,503 INFO L85 PathProgramCache]: Analyzing trace with hash -144329733, now seen corresponding path program 1 times [2024-11-20 14:41:59,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:41:59,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465316389] [2024-11-20 14:41:59,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:41:59,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:41:59,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:41:59,794 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 14:41:59,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:41:59,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465316389] [2024-11-20 14:41:59,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465316389] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:41:59,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694792587] [2024-11-20 14:41:59,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:41:59,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:41:59,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:41:59,797 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 14:41:59,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-20 14:41:59,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:41:59,886 INFO L255 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-20 14:41:59,888 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 14:41:59,899 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-20 14:41:59,909 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-20 14:41:59,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-20 14:41:59,940 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-20 14:41:59,948 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-20 14:41:59,949 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-20 14:42:00,063 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-20 14:42:00,064 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-11-20 14:42:00,076 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-20 14:42:00,076 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-20 14:42:00,218 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 14:42:00,218 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 14:42:00,450 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 14:42:00,451 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2024-11-20 14:42:00,585 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 14:42:00,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694792587] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 14:42:00,585 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 14:42:00,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 5] total 17 [2024-11-20 14:42:00,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13033367] [2024-11-20 14:42:00,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 14:42:00,586 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-20 14:42:00,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:42:00,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-20 14:42:00,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2024-11-20 14:42:00,587 INFO L87 Difference]: Start difference. First operand 94 states and 109 transitions. Second operand has 18 states, 17 states have (on average 5.352941176470588) internal successors, (91), 18 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:42:00,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:42:00,969 INFO L93 Difference]: Finished difference Result 119 states and 132 transitions. [2024-11-20 14:42:00,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-20 14:42:00,970 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 5.352941176470588) internal successors, (91), 18 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2024-11-20 14:42:00,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:42:00,971 INFO L225 Difference]: With dead ends: 119 [2024-11-20 14:42:00,972 INFO L226 Difference]: Without dead ends: 119 [2024-11-20 14:42:00,972 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=128, Invalid=334, Unknown=0, NotChecked=0, Total=462 [2024-11-20 14:42:00,973 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 117 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-20 14:42:00,973 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 187 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-20 14:42:00,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2024-11-20 14:42:00,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 113. [2024-11-20 14:42:00,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 107 states have (on average 1.233644859813084) internal successors, (132), 112 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) [2024-11-20 14:42:00,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 132 transitions. [2024-11-20 14:42:00,976 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 132 transitions. Word has length 31 [2024-11-20 14:42:00,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:42:00,977 INFO L471 AbstractCegarLoop]: Abstraction has 113 states and 132 transitions. [2024-11-20 14:42:00,977 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 5.352941176470588) internal successors, (91), 18 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:42:00,977 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 132 transitions. [2024-11-20 14:42:00,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-20 14:42:00,979 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:42:00,979 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:42:00,988 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-20 14:42:01,183 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-20 14:42:01,184 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-20 14:42:01,184 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:42:01,184 INFO L85 PathProgramCache]: Analyzing trace with hash -195422278, now seen corresponding path program 1 times [2024-11-20 14:42:01,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:42:01,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182998308] [2024-11-20 14:42:01,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:42:01,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:42:01,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:42:01,340 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 14:42:01,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:42:01,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182998308] [2024-11-20 14:42:01,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182998308] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:42:01,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508035130] [2024-11-20 14:42:01,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:42:01,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:42:01,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:42:01,344 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 14:42:01,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-20 14:42:01,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:42:01,432 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-20 14:42:01,434 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 14:42:01,490 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 14:42:01,490 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 14:42:01,553 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 14:42:01,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508035130] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 14:42:01,553 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 14:42:01,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 13 [2024-11-20 14:42:01,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496927534] [2024-11-20 14:42:01,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 14:42:01,554 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-20 14:42:01,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:42:01,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-20 14:42:01,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2024-11-20 14:42:01,555 INFO L87 Difference]: Start difference. First operand 113 states and 132 transitions. Second operand has 13 states, 13 states have (on average 8.153846153846153) internal successors, (106), 13 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:42:01,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:42:01,895 INFO L93 Difference]: Finished difference Result 156 states and 173 transitions. [2024-11-20 14:42:01,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-20 14:42:01,895 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 8.153846153846153) internal successors, (106), 13 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 37 [2024-11-20 14:42:01,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:42:01,897 INFO L225 Difference]: With dead ends: 156 [2024-11-20 14:42:01,897 INFO L226 Difference]: Without dead ends: 156 [2024-11-20 14:42:01,898 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=256, Invalid=614, Unknown=0, NotChecked=0, Total=870 [2024-11-20 14:42:01,899 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 173 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-20 14:42:01,899 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 157 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-20 14:42:01,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2024-11-20 14:42:01,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 135. [2024-11-20 14:42:01,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 130 states have (on average 1.2230769230769232) internal successors, (159), 134 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:42:01,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 159 transitions. [2024-11-20 14:42:01,902 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 159 transitions. Word has length 37 [2024-11-20 14:42:01,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:42:01,902 INFO L471 AbstractCegarLoop]: Abstraction has 135 states and 159 transitions. [2024-11-20 14:42:01,903 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.153846153846153) internal successors, (106), 13 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:42:01,903 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 159 transitions. [2024-11-20 14:42:01,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-20 14:42:01,904 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:42:01,904 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:42:01,912 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-20 14:42:02,105 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-20 14:42:02,105 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-20 14:42:02,105 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:42:02,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1675444341, now seen corresponding path program 1 times [2024-11-20 14:42:02,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:42:02,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973202749] [2024-11-20 14:42:02,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:42:02,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:42:02,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:42:02,415 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 14:42:02,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:42:02,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973202749] [2024-11-20 14:42:02,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973202749] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:42:02,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871237453] [2024-11-20 14:42:02,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:42:02,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:42:02,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:42:02,419 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 14:42:02,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-20 14:42:02,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:42:02,527 INFO L255 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-20 14:42:02,532 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 14:42:02,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-20 14:42:02,675 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-20 14:42:02,682 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-20 14:42:02,682 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-20 14:42:02,744 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 14:42:02,744 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 14:42:02,897 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 52 treesize of output 48 [2024-11-20 14:42:02,913 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 14:42:02,914 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 64 [2024-11-20 14:42:03,091 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 14:42:03,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871237453] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 14:42:03,091 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 14:42:03,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 17 [2024-11-20 14:42:03,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042815684] [2024-11-20 14:42:03,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 14:42:03,092 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-20 14:42:03,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:42:03,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-20 14:42:03,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2024-11-20 14:42:03,093 INFO L87 Difference]: Start difference. First operand 135 states and 159 transitions. Second operand has 18 states, 17 states have (on average 7.117647058823529) internal successors, (121), 18 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:42:03,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:42:03,401 INFO L93 Difference]: Finished difference Result 210 states and 255 transitions. [2024-11-20 14:42:03,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-20 14:42:03,402 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 7.117647058823529) internal successors, (121), 18 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2024-11-20 14:42:03,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:42:03,403 INFO L225 Difference]: With dead ends: 210 [2024-11-20 14:42:03,403 INFO L226 Difference]: Without dead ends: 210 [2024-11-20 14:42:03,404 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=176, Invalid=526, Unknown=0, NotChecked=0, Total=702 [2024-11-20 14:42:03,404 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 130 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-20 14:42:03,405 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 185 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-20 14:42:03,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2024-11-20 14:42:03,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 153. [2024-11-20 14:42:03,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 148 states have (on average 1.2364864864864864) internal successors, (183), 152 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:42:03,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 183 transitions. [2024-11-20 14:42:03,408 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 183 transitions. Word has length 41 [2024-11-20 14:42:03,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:42:03,408 INFO L471 AbstractCegarLoop]: Abstraction has 153 states and 183 transitions. [2024-11-20 14:42:03,409 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 7.117647058823529) internal successors, (121), 18 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:42:03,409 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 183 transitions. [2024-11-20 14:42:03,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-20 14:42:03,409 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:42:03,409 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:42:03,418 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-20 14:42:03,613 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-20 14:42:03,614 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-20 14:42:03,614 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:42:03,614 INFO L85 PathProgramCache]: Analyzing trace with hash -399167057, now seen corresponding path program 1 times [2024-11-20 14:42:03,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:42:03,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789075010] [2024-11-20 14:42:03,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:42:03,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:42:03,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:42:03,849 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 14:42:03,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:42:03,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789075010] [2024-11-20 14:42:03,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789075010] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:42:03,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827827289] [2024-11-20 14:42:03,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:42:03,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:42:03,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:42:03,853 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 14:42:03,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-20 14:42:03,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:42:03,961 INFO L255 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-11-20 14:42:03,964 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 14:42:04,049 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-20 14:42:04,108 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-20 14:42:04,224 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 18 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 14:42:04,224 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 14:42:04,285 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 14 treesize of output 12 [2024-11-20 14:42:04,287 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 18 treesize of output 16 [2024-11-20 14:42:04,304 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 14 treesize of output 12 [2024-11-20 14:42:04,308 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 18 treesize of output 16 [2024-11-20 14:42:04,334 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 18 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 14:42:04,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827827289] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 14:42:04,334 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 14:42:04,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 15, 15] total 22 [2024-11-20 14:42:04,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427958283] [2024-11-20 14:42:04,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 14:42:04,335 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-20 14:42:04,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:42:04,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-20 14:42:04,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=413, Unknown=0, NotChecked=0, Total=462 [2024-11-20 14:42:04,336 INFO L87 Difference]: Start difference. First operand 153 states and 183 transitions. Second operand has 22 states, 22 states have (on average 3.8181818181818183) internal successors, (84), 22 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:42:05,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:42:05,169 INFO L93 Difference]: Finished difference Result 194 states and 222 transitions. [2024-11-20 14:42:05,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-11-20 14:42:05,169 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.8181818181818183) internal successors, (84), 22 states have internal predecessors, (84), 0 states have call successors, (0), 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 42 [2024-11-20 14:42:05,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:42:05,170 INFO L225 Difference]: With dead ends: 194 [2024-11-20 14:42:05,170 INFO L226 Difference]: Without dead ends: 194 [2024-11-20 14:42:05,171 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 718 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=307, Invalid=2773, Unknown=0, NotChecked=0, Total=3080 [2024-11-20 14:42:05,172 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 206 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 731 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-20 14:42:05,172 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 288 Invalid, 746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 731 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-20 14:42:05,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2024-11-20 14:42:05,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 175. [2024-11-20 14:42:05,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 170 states have (on average 1.2176470588235293) internal successors, (207), 174 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:42:05,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 207 transitions. [2024-11-20 14:42:05,177 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 207 transitions. Word has length 42 [2024-11-20 14:42:05,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:42:05,177 INFO L471 AbstractCegarLoop]: Abstraction has 175 states and 207 transitions. [2024-11-20 14:42:05,177 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.8181818181818183) internal successors, (84), 22 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:42:05,177 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 207 transitions. [2024-11-20 14:42:05,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-20 14:42:05,180 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:42:05,180 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:42:05,189 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-20 14:42:05,384 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:42:05,385 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-20 14:42:05,385 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:42:05,385 INFO L85 PathProgramCache]: Analyzing trace with hash 183114832, now seen corresponding path program 1 times [2024-11-20 14:42:05,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:42:05,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197599583] [2024-11-20 14:42:05,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:42:05,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:42:05,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:42:05,553 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 14:42:05,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:42:05,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197599583] [2024-11-20 14:42:05,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197599583] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:42:05,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052897926] [2024-11-20 14:42:05,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:42:05,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:42:05,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:42:05,557 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 14:42:05,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-20 14:42:05,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:42:05,691 INFO L255 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-20 14:42:05,694 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 14:42:05,812 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 14:42:05,813 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 14:42:05,898 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 14:42:05,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052897926] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 14:42:05,899 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 14:42:05,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2024-11-20 14:42:05,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099714415] [2024-11-20 14:42:05,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 14:42:05,899 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-20 14:42:05,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:42:05,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-20 14:42:05,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2024-11-20 14:42:05,900 INFO L87 Difference]: Start difference. First operand 175 states and 207 transitions. Second operand has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 13 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:42:06,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:42:06,079 INFO L93 Difference]: Finished difference Result 185 states and 215 transitions. [2024-11-20 14:42:06,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-20 14:42:06,080 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 13 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2024-11-20 14:42:06,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:42:06,081 INFO L225 Difference]: With dead ends: 185 [2024-11-20 14:42:06,081 INFO L226 Difference]: Without dead ends: 185 [2024-11-20 14:42:06,082 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 83 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2024-11-20 14:42:06,082 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 122 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-20 14:42:06,082 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 187 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-20 14:42:06,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2024-11-20 14:42:06,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 167. [2024-11-20 14:42:06,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 162 states have (on average 1.2037037037037037) internal successors, (195), 166 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:42:06,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 195 transitions. [2024-11-20 14:42:06,086 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 195 transitions. Word has length 46 [2024-11-20 14:42:06,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:42:06,086 INFO L471 AbstractCegarLoop]: Abstraction has 167 states and 195 transitions. [2024-11-20 14:42:06,086 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 13 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:42:06,086 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 195 transitions. [2024-11-20 14:42:06,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-20 14:42:06,087 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:42:06,087 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1] [2024-11-20 14:42:06,096 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-20 14:42:06,291 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:42:06,292 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-20 14:42:06,292 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:42:06,292 INFO L85 PathProgramCache]: Analyzing trace with hash 457132991, now seen corresponding path program 2 times [2024-11-20 14:42:06,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:42:06,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655744373] [2024-11-20 14:42:06,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:42:06,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:42:06,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:42:06,416 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-20 14:42:06,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:42:06,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655744373] [2024-11-20 14:42:06,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655744373] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:42:06,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123751305] [2024-11-20 14:42:06,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 14:42:06,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:42:06,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:42:06,420 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 14:42:06,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-20 14:42:06,528 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 14:42:06,528 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 14:42:06,531 INFO L255 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-20 14:42:06,532 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 14:42:06,609 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 27 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-20 14:42:06,610 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 14:42:06,674 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 27 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-20 14:42:06,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123751305] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 14:42:06,675 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 14:42:06,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-11-20 14:42:06,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647241438] [2024-11-20 14:42:06,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 14:42:06,675 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-20 14:42:06,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:42:06,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-20 14:42:06,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-11-20 14:42:06,676 INFO L87 Difference]: Start difference. First operand 167 states and 195 transitions. Second operand has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:42:06,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:42:06,822 INFO L93 Difference]: Finished difference Result 167 states and 193 transitions. [2024-11-20 14:42:06,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-20 14:42:06,823 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2024-11-20 14:42:06,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:42:06,824 INFO L225 Difference]: With dead ends: 167 [2024-11-20 14:42:06,824 INFO L226 Difference]: Without dead ends: 167 [2024-11-20 14:42:06,824 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 86 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2024-11-20 14:42:06,825 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 53 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-20 14:42:06,825 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 206 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-20 14:42:06,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2024-11-20 14:42:06,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 158. [2024-11-20 14:42:06,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 153 states have (on average 1.1830065359477124) internal successors, (181), 157 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:42:06,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 181 transitions. [2024-11-20 14:42:06,828 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 181 transitions. Word has length 47 [2024-11-20 14:42:06,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:42:06,829 INFO L471 AbstractCegarLoop]: Abstraction has 158 states and 181 transitions. [2024-11-20 14:42:06,829 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:42:06,829 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 181 transitions. [2024-11-20 14:42:06,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-20 14:42:06,829 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:42:06,829 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1] [2024-11-20 14:42:06,838 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-20 14:42:07,033 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-20 14:42:07,034 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-20 14:42:07,034 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:42:07,034 INFO L85 PathProgramCache]: Analyzing trace with hash -269976254, now seen corresponding path program 3 times [2024-11-20 14:42:07,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:42:07,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593890861] [2024-11-20 14:42:07,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:42:07,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:42:07,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:42:07,311 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 1 proven. 49 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-20 14:42:07,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:42:07,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593890861] [2024-11-20 14:42:07,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593890861] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:42:07,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166464047] [2024-11-20 14:42:07,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-20 14:42:07,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:42:07,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:42:07,315 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 14:42:07,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-20 14:42:07,421 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-20 14:42:07,422 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 14:42:07,423 INFO L255 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-20 14:42:07,425 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 14:42:07,583 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 34 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-20 14:42:07,584 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 14:42:07,849 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2024-11-20 14:42:07,880 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 29 proven. 6 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-20 14:42:07,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166464047] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 14:42:07,881 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 14:42:07,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 24 [2024-11-20 14:42:07,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158853732] [2024-11-20 14:42:07,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 14:42:07,881 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-20 14:42:07,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:42:07,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-20 14:42:07,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2024-11-20 14:42:07,883 INFO L87 Difference]: Start difference. First operand 158 states and 181 transitions. Second operand has 25 states, 24 states have (on average 4.375) internal successors, (105), 25 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) [2024-11-20 14:42:08,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:42:08,400 INFO L93 Difference]: Finished difference Result 178 states and 201 transitions. [2024-11-20 14:42:08,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-20 14:42:08,401 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 4.375) internal successors, (105), 25 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 52 [2024-11-20 14:42:08,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:42:08,401 INFO L225 Difference]: With dead ends: 178 [2024-11-20 14:42:08,402 INFO L226 Difference]: Without dead ends: 178 [2024-11-20 14:42:08,402 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=239, Invalid=1243, Unknown=0, NotChecked=0, Total=1482 [2024-11-20 14:42:08,402 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 89 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-20 14:42:08,403 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 274 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-20 14:42:08,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2024-11-20 14:42:08,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 154. [2024-11-20 14:42:08,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 150 states have (on average 1.16) internal successors, (174), 153 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:42:08,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 174 transitions. [2024-11-20 14:42:08,406 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 174 transitions. Word has length 52 [2024-11-20 14:42:08,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:42:08,406 INFO L471 AbstractCegarLoop]: Abstraction has 154 states and 174 transitions. [2024-11-20 14:42:08,406 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 4.375) internal successors, (105), 25 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) [2024-11-20 14:42:08,406 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 174 transitions. [2024-11-20 14:42:08,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-11-20 14:42:08,407 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:42:08,407 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1] [2024-11-20 14:42:08,415 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-20 14:42:08,611 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:42:08,612 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-20 14:42:08,612 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:42:08,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1696845129, now seen corresponding path program 1 times [2024-11-20 14:42:08,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:42:08,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322841860] [2024-11-20 14:42:08,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:42:08,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:42:08,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:42:08,812 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 48 proven. 43 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-20 14:42:08,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:42:08,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322841860] [2024-11-20 14:42:08,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322841860] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:42:08,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106062906] [2024-11-20 14:42:08,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:42:08,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:42:08,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:42:08,816 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 14:42:08,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-20 14:42:08,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:42:08,953 INFO L255 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-20 14:42:08,955 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 14:42:09,042 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 62 proven. 29 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-20 14:42:09,043 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 14:42:09,130 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 62 proven. 29 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-20 14:42:09,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106062906] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 14:42:09,131 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 14:42:09,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2024-11-20 14:42:09,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245484823] [2024-11-20 14:42:09,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 14:42:09,132 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-20 14:42:09,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:42:09,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-20 14:42:09,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-11-20 14:42:09,133 INFO L87 Difference]: Start difference. First operand 154 states and 174 transitions. Second operand has 12 states, 12 states have (on average 6.916666666666667) internal successors, (83), 12 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:42:09,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:42:09,269 INFO L93 Difference]: Finished difference Result 179 states and 198 transitions. [2024-11-20 14:42:09,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-20 14:42:09,269 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.916666666666667) internal successors, (83), 12 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2024-11-20 14:42:09,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:42:09,270 INFO L225 Difference]: With dead ends: 179 [2024-11-20 14:42:09,270 INFO L226 Difference]: Without dead ends: 179 [2024-11-20 14:42:09,270 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 125 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2024-11-20 14:42:09,271 INFO L432 NwaCegarLoop]: 42 mSDtfsCounter, 57 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-20 14:42:09,271 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 201 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-20 14:42:09,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2024-11-20 14:42:09,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 163. [2024-11-20 14:42:09,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 159 states have (on average 1.1446540880503144) internal successors, (182), 162 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:42:09,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 182 transitions. [2024-11-20 14:42:09,274 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 182 transitions. Word has length 67 [2024-11-20 14:42:09,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:42:09,274 INFO L471 AbstractCegarLoop]: Abstraction has 163 states and 182 transitions. [2024-11-20 14:42:09,274 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.916666666666667) internal successors, (83), 12 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:42:09,274 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 182 transitions. [2024-11-20 14:42:09,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-11-20 14:42:09,275 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:42:09,275 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1] [2024-11-20 14:42:09,284 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-20 14:42:09,475 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:42:09,476 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-20 14:42:09,476 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:42:09,477 INFO L85 PathProgramCache]: Analyzing trace with hash 2103699286, now seen corresponding path program 2 times [2024-11-20 14:42:09,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:42:09,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980233413] [2024-11-20 14:42:09,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:42:09,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:42:09,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:42:09,757 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-20 14:42:09,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:42:09,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980233413] [2024-11-20 14:42:09,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980233413] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:42:09,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963763415] [2024-11-20 14:42:09,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 14:42:09,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:42:09,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:42:09,760 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 14:42:09,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-20 14:42:09,865 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-20 14:42:09,865 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 14:42:09,867 INFO L255 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-20 14:42:09,869 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 14:42:09,942 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-20 14:42:10,099 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2024-11-20 14:42:10,099 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 14:42:10,373 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2024-11-20 14:42:10,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963763415] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 14:42:10,373 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 14:42:10,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 16 [2024-11-20 14:42:10,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273401213] [2024-11-20 14:42:10,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 14:42:10,374 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-20 14:42:10,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:42:10,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-20 14:42:10,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2024-11-20 14:42:10,375 INFO L87 Difference]: Start difference. First operand 163 states and 182 transitions. Second operand has 17 states, 16 states have (on average 7.75) internal successors, (124), 17 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:42:11,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:42:11,068 INFO L93 Difference]: Finished difference Result 169 states and 185 transitions. [2024-11-20 14:42:11,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-20 14:42:11,069 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 7.75) internal successors, (124), 17 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2024-11-20 14:42:11,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:42:11,069 INFO L225 Difference]: With dead ends: 169 [2024-11-20 14:42:11,069 INFO L226 Difference]: Without dead ends: 169 [2024-11-20 14:42:11,070 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=240, Invalid=950, Unknown=0, NotChecked=0, Total=1190 [2024-11-20 14:42:11,070 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 128 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-20 14:42:11,070 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 289 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-20 14:42:11,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2024-11-20 14:42:11,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 162. [2024-11-20 14:42:11,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 159 states have (on average 1.1132075471698113) internal successors, (177), 161 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) [2024-11-20 14:42:11,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 177 transitions. [2024-11-20 14:42:11,073 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 177 transitions. Word has length 71 [2024-11-20 14:42:11,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:42:11,073 INFO L471 AbstractCegarLoop]: Abstraction has 162 states and 177 transitions. [2024-11-20 14:42:11,073 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 7.75) internal successors, (124), 17 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:42:11,074 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 177 transitions. [2024-11-20 14:42:11,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2024-11-20 14:42:11,074 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:42:11,075 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1] [2024-11-20 14:42:11,084 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-20 14:42:11,276 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-11-20 14:42:11,276 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-20 14:42:11,276 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:42:11,277 INFO L85 PathProgramCache]: Analyzing trace with hash -809246151, now seen corresponding path program 2 times [2024-11-20 14:42:11,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:42:11,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763716971] [2024-11-20 14:42:11,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:42:11,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:42:11,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:42:11,721 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 33 proven. 92 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-20 14:42:11,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:42:11,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763716971] [2024-11-20 14:42:11,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763716971] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:42:11,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77568213] [2024-11-20 14:42:11,722 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 14:42:11,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:42:11,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:42:11,725 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 14:42:11,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-20 14:42:11,873 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 14:42:11,874 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 14:42:11,881 INFO L255 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-20 14:42:11,883 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 14:42:12,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-20 14:42:12,106 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-20 14:42:12,115 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-20 14:42:12,116 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-20 14:42:12,218 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 59 proven. 61 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-20 14:42:12,218 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 14:42:12,408 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 52 treesize of output 48 [2024-11-20 14:42:12,424 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 14:42:12,425 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 64 [2024-11-20 14:42:12,671 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 59 proven. 61 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-20 14:42:12,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77568213] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 14:42:12,672 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 14:42:12,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 23 [2024-11-20 14:42:12,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377809625] [2024-11-20 14:42:12,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 14:42:12,673 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-20 14:42:12,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:42:12,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-20 14:42:12,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2024-11-20 14:42:12,676 INFO L87 Difference]: Start difference. First operand 162 states and 177 transitions. Second operand has 24 states, 23 states have (on average 8.695652173913043) internal successors, (200), 24 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:42:13,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:42:13,076 INFO L93 Difference]: Finished difference Result 228 states and 252 transitions. [2024-11-20 14:42:13,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-20 14:42:13,076 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 8.695652173913043) internal successors, (200), 24 states have internal predecessors, (200), 0 states have call successors, (0), 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 [2024-11-20 14:42:13,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:42:13,077 INFO L225 Difference]: With dead ends: 228 [2024-11-20 14:42:13,077 INFO L226 Difference]: Without dead ends: 228 [2024-11-20 14:42:13,078 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=270, Invalid=920, Unknown=0, NotChecked=0, Total=1190 [2024-11-20 14:42:13,078 INFO L432 NwaCegarLoop]: 51 mSDtfsCounter, 170 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-20 14:42:13,078 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 334 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-20 14:42:13,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2024-11-20 14:42:13,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 177. [2024-11-20 14:42:13,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 174 states have (on average 1.1206896551724137) internal successors, (195), 176 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:42:13,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 195 transitions. [2024-11-20 14:42:13,082 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 195 transitions. Word has length 75 [2024-11-20 14:42:13,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:42:13,082 INFO L471 AbstractCegarLoop]: Abstraction has 177 states and 195 transitions. [2024-11-20 14:42:13,082 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 8.695652173913043) internal successors, (200), 24 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:42:13,082 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 195 transitions. [2024-11-20 14:42:13,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2024-11-20 14:42:13,083 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:42:13,083 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1] [2024-11-20 14:42:13,092 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-20 14:42:13,283 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:42:13,284 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-20 14:42:13,284 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:42:13,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1737117148, now seen corresponding path program 3 times [2024-11-20 14:42:13,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:42:13,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637341793] [2024-11-20 14:42:13,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:42:13,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:42:13,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:42:13,487 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 13 proven. 137 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-20 14:42:13,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:42:13,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637341793] [2024-11-20 14:42:13,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637341793] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:42:13,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973904575] [2024-11-20 14:42:13,488 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-20 14:42:13,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:42:13,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:42:13,490 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 14:42:13,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-20 14:42:13,616 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-20 14:42:13,617 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 14:42:13,618 INFO L255 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-20 14:42:13,620 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 14:42:13,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-20 14:42:13,665 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-20 14:42:13,671 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-20 14:42:13,671 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-20 14:42:13,745 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 79 proven. 3 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2024-11-20 14:42:13,745 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 14:42:13,964 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 70 proven. 12 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2024-11-20 14:42:13,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973904575] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 14:42:13,965 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 14:42:13,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 22 [2024-11-20 14:42:13,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350850441] [2024-11-20 14:42:13,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 14:42:13,966 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-20 14:42:13,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:42:13,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-20 14:42:13,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2024-11-20 14:42:13,967 INFO L87 Difference]: Start difference. First operand 177 states and 195 transitions. Second operand has 22 states, 22 states have (on average 5.590909090909091) internal successors, (123), 22 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:42:14,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:42:14,648 INFO L93 Difference]: Finished difference Result 181 states and 196 transitions. [2024-11-20 14:42:14,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-11-20 14:42:14,649 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.590909090909091) internal successors, (123), 22 states have internal predecessors, (123), 0 states have call successors, (0), 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 80 [2024-11-20 14:42:14,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:42:14,650 INFO L225 Difference]: With dead ends: 181 [2024-11-20 14:42:14,650 INFO L226 Difference]: Without dead ends: 181 [2024-11-20 14:42:14,651 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 694 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=589, Invalid=2273, Unknown=0, NotChecked=0, Total=2862 [2024-11-20 14:42:14,651 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 277 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-20 14:42:14,651 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [277 Valid, 153 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-20 14:42:14,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2024-11-20 14:42:14,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 163. [2024-11-20 14:42:14,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 161 states have (on average 1.093167701863354) internal successors, (176), 162 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:42:14,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 176 transitions. [2024-11-20 14:42:14,654 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 176 transitions. Word has length 80 [2024-11-20 14:42:14,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:42:14,655 INFO L471 AbstractCegarLoop]: Abstraction has 163 states and 176 transitions. [2024-11-20 14:42:14,655 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.590909090909091) internal successors, (123), 22 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:42:14,655 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 176 transitions. [2024-11-20 14:42:14,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2024-11-20 14:42:14,656 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:42:14,656 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 2, 1, 1, 1] [2024-11-20 14:42:14,665 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-20 14:42:14,860 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:42:14,861 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-20 14:42:14,861 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:42:14,861 INFO L85 PathProgramCache]: Analyzing trace with hash -557204140, now seen corresponding path program 2 times [2024-11-20 14:42:14,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:42:14,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522101581] [2024-11-20 14:42:14,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:42:14,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:42:14,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:42:15,095 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 229 proven. 39 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2024-11-20 14:42:15,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:42:15,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522101581] [2024-11-20 14:42:15,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522101581] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:42:15,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779857494] [2024-11-20 14:42:15,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 14:42:15,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:42:15,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:42:15,098 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 14:42:15,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-20 14:42:15,300 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 14:42:15,300 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 14:42:15,305 INFO L255 TraceCheckSpWp]: Trace formula consists of 595 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-20 14:42:15,308 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 14:42:15,449 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 251 proven. 49 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2024-11-20 14:42:15,449 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 14:42:15,576 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 251 proven. 49 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2024-11-20 14:42:15,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779857494] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 14:42:15,576 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 14:42:15,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2024-11-20 14:42:15,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628623319] [2024-11-20 14:42:15,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 14:42:15,577 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-20 14:42:15,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:42:15,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-20 14:42:15,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2024-11-20 14:42:15,578 INFO L87 Difference]: Start difference. First operand 163 states and 176 transitions. Second operand has 15 states, 15 states have (on average 8.866666666666667) internal successors, (133), 15 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:42:15,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:42:15,828 INFO L93 Difference]: Finished difference Result 181 states and 193 transitions. [2024-11-20 14:42:15,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-20 14:42:15,829 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 8.866666666666667) internal successors, (133), 15 states have internal predecessors, (133), 0 states have call successors, (0), 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 118 [2024-11-20 14:42:15,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:42:15,829 INFO L225 Difference]: With dead ends: 181 [2024-11-20 14:42:15,829 INFO L226 Difference]: Without dead ends: 181 [2024-11-20 14:42:15,830 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 224 SyntacticMatches, 6 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=488, Unknown=0, NotChecked=0, Total=650 [2024-11-20 14:42:15,830 INFO L432 NwaCegarLoop]: 42 mSDtfsCounter, 70 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-20 14:42:15,831 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 199 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-20 14:42:15,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2024-11-20 14:42:15,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 173. [2024-11-20 14:42:15,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 171 states have (on average 1.0818713450292399) internal successors, (185), 172 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) [2024-11-20 14:42:15,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 185 transitions. [2024-11-20 14:42:15,834 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 185 transitions. Word has length 118 [2024-11-20 14:42:15,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:42:15,834 INFO L471 AbstractCegarLoop]: Abstraction has 173 states and 185 transitions. [2024-11-20 14:42:15,834 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 8.866666666666667) internal successors, (133), 15 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:42:15,834 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 185 transitions. [2024-11-20 14:42:15,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2024-11-20 14:42:15,835 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:42:15,835 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 2, 1, 1, 1] [2024-11-20 14:42:15,846 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-11-20 14:42:16,035 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:42:16,035 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-20 14:42:16,036 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:42:16,036 INFO L85 PathProgramCache]: Analyzing trace with hash -2123894436, now seen corresponding path program 3 times [2024-11-20 14:42:16,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:42:16,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282462662] [2024-11-20 14:42:16,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:42:16,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:42:16,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:42:16,341 INFO L134 CoverageAnalysis]: Checked inductivity of 446 backedges. 322 proven. 62 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2024-11-20 14:42:16,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:42:16,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282462662] [2024-11-20 14:42:16,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282462662] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:42:16,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131042165] [2024-11-20 14:42:16,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-20 14:42:16,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:42:16,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:42:16,344 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 14:42:16,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-20 14:42:16,592 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-20 14:42:16,593 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 14:42:16,595 INFO L255 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-20 14:42:16,598 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 14:42:16,849 INFO L134 CoverageAnalysis]: Checked inductivity of 446 backedges. 20 proven. 319 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2024-11-20 14:42:16,849 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 14:42:17,062 INFO L134 CoverageAnalysis]: Checked inductivity of 446 backedges. 31 proven. 308 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2024-11-20 14:42:17,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131042165] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 14:42:17,062 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 14:42:17,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 25 [2024-11-20 14:42:17,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479021842] [2024-11-20 14:42:17,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 14:42:17,063 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-20 14:42:17,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:42:17,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-20 14:42:17,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2024-11-20 14:42:17,064 INFO L87 Difference]: Start difference. First operand 173 states and 185 transitions. Second operand has 25 states, 25 states have (on average 7.36) internal successors, (184), 25 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:42:17,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:42:17,630 INFO L93 Difference]: Finished difference Result 198 states and 210 transitions. [2024-11-20 14:42:17,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-20 14:42:17,631 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 7.36) internal successors, (184), 25 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 128 [2024-11-20 14:42:17,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:42:17,632 INFO L225 Difference]: With dead ends: 198 [2024-11-20 14:42:17,632 INFO L226 Difference]: Without dead ends: 198 [2024-11-20 14:42:17,633 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 239 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=480, Invalid=1590, Unknown=0, NotChecked=0, Total=2070 [2024-11-20 14:42:17,633 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 103 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 650 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-20 14:42:17,633 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 267 Invalid, 655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 650 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-20 14:42:17,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2024-11-20 14:42:17,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 185. [2024-11-20 14:42:17,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 183 states have (on average 1.0765027322404372) internal successors, (197), 184 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) [2024-11-20 14:42:17,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 197 transitions. [2024-11-20 14:42:17,636 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 197 transitions. Word has length 128 [2024-11-20 14:42:17,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:42:17,637 INFO L471 AbstractCegarLoop]: Abstraction has 185 states and 197 transitions. [2024-11-20 14:42:17,637 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 7.36) internal successors, (184), 25 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:42:17,637 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 197 transitions. [2024-11-20 14:42:17,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2024-11-20 14:42:17,638 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:42:17,638 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 2, 1, 1, 1] [2024-11-20 14:42:17,647 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-20 14:42:17,838 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-20 14:42:17,838 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-20 14:42:17,839 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:42:17,839 INFO L85 PathProgramCache]: Analyzing trace with hash -1562413406, now seen corresponding path program 4 times [2024-11-20 14:42:17,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:42:17,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877989026] [2024-11-20 14:42:17,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:42:17,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:42:17,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:42:18,128 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 277 proven. 176 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2024-11-20 14:42:18,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:42:18,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877989026] [2024-11-20 14:42:18,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877989026] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:42:18,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33708706] [2024-11-20 14:42:18,129 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-20 14:42:18,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:42:18,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:42:18,131 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 14:42:18,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-20 14:42:18,570 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-20 14:42:18,570 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 14:42:18,573 INFO L255 TraceCheckSpWp]: Trace formula consists of 653 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-20 14:42:18,575 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 14:42:18,747 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 323 proven. 130 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2024-11-20 14:42:18,747 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 14:42:18,919 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 323 proven. 130 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2024-11-20 14:42:18,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33708706] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 14:42:18,920 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 14:42:18,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2024-11-20 14:42:18,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691976993] [2024-11-20 14:42:18,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 14:42:18,921 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-20 14:42:18,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:42:18,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-20 14:42:18,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2024-11-20 14:42:18,923 INFO L87 Difference]: Start difference. First operand 185 states and 197 transitions. Second operand has 17 states, 17 states have (on average 8.0) internal successors, (136), 17 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:42:19,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:42:19,150 INFO L93 Difference]: Finished difference Result 203 states and 215 transitions. [2024-11-20 14:42:19,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-20 14:42:19,151 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 8.0) internal successors, (136), 17 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 136 [2024-11-20 14:42:19,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:42:19,152 INFO L225 Difference]: With dead ends: 203 [2024-11-20 14:42:19,152 INFO L226 Difference]: Without dead ends: 203 [2024-11-20 14:42:19,152 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 258 SyntacticMatches, 8 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2024-11-20 14:42:19,153 INFO L432 NwaCegarLoop]: 68 mSDtfsCounter, 53 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-20 14:42:19,153 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 256 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-20 14:42:19,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2024-11-20 14:42:19,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 195. [2024-11-20 14:42:19,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 193 states have (on average 1.072538860103627) internal successors, (207), 194 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:42:19,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 207 transitions. [2024-11-20 14:42:19,156 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 207 transitions. Word has length 136 [2024-11-20 14:42:19,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:42:19,157 INFO L471 AbstractCegarLoop]: Abstraction has 195 states and 207 transitions. [2024-11-20 14:42:19,157 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 8.0) internal successors, (136), 17 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:42:19,157 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 207 transitions. [2024-11-20 14:42:19,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2024-11-20 14:42:19,158 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:42:19,158 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 9, 9, 9, 9, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 2, 1, 1, 1] [2024-11-20 14:42:19,171 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-11-20 14:42:19,358 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-20 14:42:19,359 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-20 14:42:19,359 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:42:19,359 INFO L85 PathProgramCache]: Analyzing trace with hash 188104713, now seen corresponding path program 5 times [2024-11-20 14:42:19,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:42:19,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786277028] [2024-11-20 14:42:19,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:42:19,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:42:19,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:42:19,691 INFO L134 CoverageAnalysis]: Checked inductivity of 566 backedges. 179 proven. 305 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2024-11-20 14:42:19,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:42:19,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786277028] [2024-11-20 14:42:19,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786277028] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:42:19,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454580957] [2024-11-20 14:42:19,692 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-20 14:42:19,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:42:19,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:42:19,695 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 14:42:19,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-20 14:42:20,276 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-11-20 14:42:20,276 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 14:42:20,280 INFO L255 TraceCheckSpWp]: Trace formula consists of 671 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-20 14:42:20,282 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 14:42:20,401 INFO L134 CoverageAnalysis]: Checked inductivity of 566 backedges. 282 proven. 31 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2024-11-20 14:42:20,402 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 14:42:20,512 INFO L134 CoverageAnalysis]: Checked inductivity of 566 backedges. 282 proven. 31 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2024-11-20 14:42:20,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454580957] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 14:42:20,512 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 14:42:20,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 24 [2024-11-20 14:42:20,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512141724] [2024-11-20 14:42:20,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 14:42:20,513 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-20 14:42:20,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:42:20,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-20 14:42:20,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2024-11-20 14:42:20,514 INFO L87 Difference]: Start difference. First operand 195 states and 207 transitions. Second operand has 24 states, 24 states have (on average 6.916666666666667) internal successors, (166), 24 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:42:21,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:42:21,099 INFO L93 Difference]: Finished difference Result 213 states and 225 transitions. [2024-11-20 14:42:21,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-20 14:42:21,099 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 6.916666666666667) internal successors, (166), 24 states have internal predecessors, (166), 0 states have call successors, (0), 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 141 [2024-11-20 14:42:21,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:42:21,100 INFO L225 Difference]: With dead ends: 213 [2024-11-20 14:42:21,100 INFO L226 Difference]: Without dead ends: 213 [2024-11-20 14:42:21,101 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 265 SyntacticMatches, 5 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=522, Invalid=1734, Unknown=0, NotChecked=0, Total=2256 [2024-11-20 14:42:21,101 INFO L432 NwaCegarLoop]: 54 mSDtfsCounter, 109 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 817 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 817 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-20 14:42:21,102 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 382 Invalid, 819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 817 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-20 14:42:21,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2024-11-20 14:42:21,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 203. [2024-11-20 14:42:21,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 201 states have (on average 1.0696517412935322) internal successors, (215), 202 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:42:21,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 215 transitions. [2024-11-20 14:42:21,105 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 215 transitions. Word has length 141 [2024-11-20 14:42:21,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:42:21,105 INFO L471 AbstractCegarLoop]: Abstraction has 203 states and 215 transitions. [2024-11-20 14:42:21,105 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 6.916666666666667) internal successors, (166), 24 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:42:21,105 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 215 transitions. [2024-11-20 14:42:21,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2024-11-20 14:42:21,106 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:42:21,106 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 2, 1, 1, 1] [2024-11-20 14:42:21,116 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-20 14:42:21,307 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:42:21,308 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-20 14:42:21,308 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:42:21,308 INFO L85 PathProgramCache]: Analyzing trace with hash 2033693772, now seen corresponding path program 6 times [2024-11-20 14:42:21,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:42:21,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955002719] [2024-11-20 14:42:21,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:42:21,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:42:21,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:42:22,613 INFO L134 CoverageAnalysis]: Checked inductivity of 607 backedges. 0 proven. 525 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2024-11-20 14:42:22,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:42:22,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955002719] [2024-11-20 14:42:22,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955002719] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:42:22,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049062411] [2024-11-20 14:42:22,614 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-20 14:42:22,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:42:22,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:42:22,615 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 14:42:22,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-20 14:42:23,001 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-11-20 14:42:23,001 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 14:42:23,004 INFO L255 TraceCheckSpWp]: Trace formula consists of 682 conjuncts, 67 conjuncts are in the unsatisfiable core [2024-11-20 14:42:23,008 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 14:42:23,015 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-20 14:42:23,019 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-20 14:42:23,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-20 14:42:23,045 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-20 14:42:23,052 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-20 14:42:23,052 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-20 14:42:23,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-20 14:42:23,123 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-20 14:42:23,133 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-20 14:42:23,133 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-20 14:42:23,188 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-20 14:42:23,188 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-20 14:42:23,192 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-20 14:42:23,300 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-20 14:42:23,300 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-20 14:42:23,304 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-20 14:42:23,617 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 [2024-11-20 14:42:23,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-20 14:42:23,710 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-20 14:42:23,716 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-20 14:42:23,717 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-20 14:42:24,001 INFO L134 CoverageAnalysis]: Checked inductivity of 607 backedges. 272 proven. 196 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2024-11-20 14:42:24,001 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 14:42:24,419 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-20 14:42:24,419 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 40 [2024-11-20 14:42:24,865 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-20 14:42:24,865 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2024-11-20 14:42:25,079 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-20 14:42:25,079 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2024-11-20 14:42:25,189 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-20 14:42:25,190 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2024-11-20 14:42:25,274 INFO L134 CoverageAnalysis]: Checked inductivity of 607 backedges. 2 proven. 452 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2024-11-20 14:42:25,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049062411] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 14:42:25,274 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 14:42:25,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 13, 14] total 46 [2024-11-20 14:42:25,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114350391] [2024-11-20 14:42:25,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 14:42:25,275 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-11-20 14:42:25,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:42:25,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-11-20 14:42:25,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=347, Invalid=1815, Unknown=0, NotChecked=0, Total=2162 [2024-11-20 14:42:25,277 INFO L87 Difference]: Start difference. First operand 203 states and 215 transitions. Second operand has 47 states, 46 states have (on average 5.521739130434782) internal successors, (254), 47 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:42:27,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:42:27,921 INFO L93 Difference]: Finished difference Result 367 states and 396 transitions. [2024-11-20 14:42:27,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2024-11-20 14:42:27,922 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 5.521739130434782) internal successors, (254), 47 states have internal predecessors, (254), 0 states have call successors, (0), 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 145 [2024-11-20 14:42:27,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:42:27,923 INFO L225 Difference]: With dead ends: 367 [2024-11-20 14:42:27,923 INFO L226 Difference]: Without dead ends: 367 [2024-11-20 14:42:27,925 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 262 SyntacticMatches, 4 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2436 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2105, Invalid=7597, Unknown=0, NotChecked=0, Total=9702 [2024-11-20 14:42:27,926 INFO L432 NwaCegarLoop]: 46 mSDtfsCounter, 1094 mSDsluCounter, 684 mSDsCounter, 0 mSdLazyCounter, 1182 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1094 SdHoareTripleChecker+Valid, 730 SdHoareTripleChecker+Invalid, 1292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 1182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-20 14:42:27,926 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1094 Valid, 730 Invalid, 1292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 1182 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-20 14:42:27,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2024-11-20 14:42:27,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 357. [2024-11-20 14:42:27,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 355 states have (on average 1.087323943661972) internal successors, (386), 356 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:42:27,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 386 transitions. [2024-11-20 14:42:27,941 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 386 transitions. Word has length 145 [2024-11-20 14:42:27,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:42:27,941 INFO L471 AbstractCegarLoop]: Abstraction has 357 states and 386 transitions. [2024-11-20 14:42:27,942 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 5.521739130434782) internal successors, (254), 47 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:42:27,942 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 386 transitions. [2024-11-20 14:42:27,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2024-11-20 14:42:27,943 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:42:27,943 INFO L215 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:42:27,952 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-11-20 14:42:28,143 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:42:28,143 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-20 14:42:28,144 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:42:28,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1941601421, now seen corresponding path program 1 times [2024-11-20 14:42:28,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:42:28,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610248827] [2024-11-20 14:42:28,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:42:28,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:42:28,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:42:28,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1158 backedges. 0 proven. 986 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2024-11-20 14:42:28,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:42:28,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610248827] [2024-11-20 14:42:28,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610248827] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:42:28,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132969246] [2024-11-20 14:42:28,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:42:28,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:42:28,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:42:28,420 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 14:42:28,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-20 14:42:28,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:42:28,704 INFO L255 TraceCheckSpWp]: Trace formula consists of 901 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-20 14:42:28,707 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 14:42:28,984 INFO L134 CoverageAnalysis]: Checked inductivity of 1158 backedges. 751 proven. 269 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2024-11-20 14:42:28,985 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 14:42:29,201 INFO L134 CoverageAnalysis]: Checked inductivity of 1158 backedges. 751 proven. 269 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2024-11-20 14:42:29,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132969246] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 14:42:29,201 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 14:42:29,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 13] total 25 [2024-11-20 14:42:29,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339049025] [2024-11-20 14:42:29,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 14:42:29,202 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-20 14:42:29,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:42:29,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-20 14:42:29,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=481, Unknown=0, NotChecked=0, Total=600 [2024-11-20 14:42:29,203 INFO L87 Difference]: Start difference. First operand 357 states and 386 transitions. Second operand has 25 states, 25 states have (on average 10.8) internal successors, (270), 25 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:42:29,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:42:29,705 INFO L93 Difference]: Finished difference Result 483 states and 520 transitions. [2024-11-20 14:42:29,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-11-20 14:42:29,706 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 10.8) internal successors, (270), 25 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 201 [2024-11-20 14:42:29,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:42:29,707 INFO L225 Difference]: With dead ends: 483 [2024-11-20 14:42:29,707 INFO L226 Difference]: Without dead ends: 483 [2024-11-20 14:42:29,708 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 380 SyntacticMatches, 6 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 863 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=700, Invalid=2722, Unknown=0, NotChecked=0, Total=3422 [2024-11-20 14:42:29,709 INFO L432 NwaCegarLoop]: 82 mSDtfsCounter, 253 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 480 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-20 14:42:29,709 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 480 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 447 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-20 14:42:29,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2024-11-20 14:42:29,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 388. [2024-11-20 14:42:29,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 386 states have (on average 1.0803108808290156) internal successors, (417), 387 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:42:29,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 417 transitions. [2024-11-20 14:42:29,715 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 417 transitions. Word has length 201 [2024-11-20 14:42:29,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:42:29,716 INFO L471 AbstractCegarLoop]: Abstraction has 388 states and 417 transitions. [2024-11-20 14:42:29,716 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 10.8) internal successors, (270), 25 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:42:29,716 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 417 transitions. [2024-11-20 14:42:29,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2024-11-20 14:42:29,717 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:42:29,717 INFO L215 NwaCegarLoop]: trace histogram [20, 20, 20, 20, 20, 18, 18, 18, 18, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:42:29,727 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-20 14:42:29,918 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:42:29,918 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-20 14:42:29,919 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:42:29,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1655746050, now seen corresponding path program 2 times [2024-11-20 14:42:29,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:42:29,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278504516] [2024-11-20 14:42:29,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:42:29,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:42:29,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:42:30,522 INFO L134 CoverageAnalysis]: Checked inductivity of 2066 backedges. 1227 proven. 583 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2024-11-20 14:42:30,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:42:30,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278504516] [2024-11-20 14:42:30,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278504516] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:42:30,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411410186] [2024-11-20 14:42:30,523 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 14:42:30,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:42:30,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:42:30,527 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 14:42:30,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-20 14:42:30,811 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 14:42:30,811 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 14:42:30,814 INFO L255 TraceCheckSpWp]: Trace formula consists of 1129 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-20 14:42:30,817 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 14:42:31,060 INFO L134 CoverageAnalysis]: Checked inductivity of 2066 backedges. 1292 proven. 518 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2024-11-20 14:42:31,060 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 14:42:31,349 INFO L134 CoverageAnalysis]: Checked inductivity of 2066 backedges. 1292 proven. 518 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2024-11-20 14:42:31,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411410186] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 14:42:31,349 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 14:42:31,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 21 [2024-11-20 14:42:31,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867252010] [2024-11-20 14:42:31,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 14:42:31,351 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-20 14:42:31,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:42:31,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-20 14:42:31,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2024-11-20 14:42:31,352 INFO L87 Difference]: Start difference. First operand 388 states and 417 transitions. Second operand has 21 states, 21 states have (on average 8.571428571428571) internal successors, (180), 21 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) [2024-11-20 14:42:31,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:42:31,592 INFO L93 Difference]: Finished difference Result 428 states and 457 transitions. [2024-11-20 14:42:31,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-20 14:42:31,593 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 8.571428571428571) internal successors, (180), 21 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) Word has length 258 [2024-11-20 14:42:31,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:42:31,594 INFO L225 Difference]: With dead ends: 428 [2024-11-20 14:42:31,594 INFO L226 Difference]: Without dead ends: 428 [2024-11-20 14:42:31,594 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 539 GetRequests, 498 SyntacticMatches, 11 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=272, Invalid=720, Unknown=0, NotChecked=0, Total=992 [2024-11-20 14:42:31,595 INFO L432 NwaCegarLoop]: 88 mSDtfsCounter, 83 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-20 14:42:31,595 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 485 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-20 14:42:31,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2024-11-20 14:42:31,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 408. [2024-11-20 14:42:31,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 406 states have (on average 1.0763546798029557) internal successors, (437), 407 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:42:31,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 437 transitions. [2024-11-20 14:42:31,603 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 437 transitions. Word has length 258 [2024-11-20 14:42:31,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:42:31,604 INFO L471 AbstractCegarLoop]: Abstraction has 408 states and 437 transitions. [2024-11-20 14:42:31,604 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 8.571428571428571) internal successors, (180), 21 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) [2024-11-20 14:42:31,605 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 437 transitions. [2024-11-20 14:42:31,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2024-11-20 14:42:31,606 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:42:31,607 INFO L215 NwaCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 14:42:31,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-11-20 14:42:31,807 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2024-11-20 14:42:31,807 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-20 14:42:31,808 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:42:31,809 INFO L85 PathProgramCache]: Analyzing trace with hash 90750776, now seen corresponding path program 3 times [2024-11-20 14:42:31,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:42:31,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346534897] [2024-11-20 14:42:31,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:42:31,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:42:31,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:42:32,160 INFO L134 CoverageAnalysis]: Checked inductivity of 2228 backedges. 0 proven. 1918 refuted. 0 times theorem prover too weak. 310 trivial. 0 not checked. [2024-11-20 14:42:32,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:42:32,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346534897] [2024-11-20 14:42:32,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346534897] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:42:32,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011878928] [2024-11-20 14:42:32,161 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-20 14:42:32,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:42:32,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:42:32,164 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 14:42:32,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-20 14:42:32,544 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-11-20 14:42:32,545 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 14:42:32,549 INFO L255 TraceCheckSpWp]: Trace formula consists of 835 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-20 14:42:32,553 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 14:42:32,715 INFO L134 CoverageAnalysis]: Checked inductivity of 2228 backedges. 832 proven. 55 refuted. 0 times theorem prover too weak. 1341 trivial. 0 not checked. [2024-11-20 14:42:32,715 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 14:42:32,916 INFO L134 CoverageAnalysis]: Checked inductivity of 2228 backedges. 832 proven. 55 refuted. 0 times theorem prover too weak. 1341 trivial. 0 not checked. [2024-11-20 14:42:32,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011878928] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 14:42:32,916 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 14:42:32,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2024-11-20 14:42:32,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881840043] [2024-11-20 14:42:32,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 14:42:32,917 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-20 14:42:32,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:42:32,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-20 14:42:32,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=342, Unknown=0, NotChecked=0, Total=552 [2024-11-20 14:42:32,918 INFO L87 Difference]: Start difference. First operand 408 states and 437 transitions. Second operand has 24 states, 24 states have (on average 9.625) internal successors, (231), 24 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:42:33,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:42:33,825 INFO L93 Difference]: Finished difference Result 1031 states and 1120 transitions. [2024-11-20 14:42:33,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2024-11-20 14:42:33,826 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 9.625) internal successors, (231), 24 states have internal predecessors, (231), 0 states have call successors, (0), 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 266 [2024-11-20 14:42:33,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:42:33,829 INFO L225 Difference]: With dead ends: 1031 [2024-11-20 14:42:33,829 INFO L226 Difference]: Without dead ends: 1031 [2024-11-20 14:42:33,831 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 592 GetRequests, 518 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1634 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2089, Invalid=3611, Unknown=0, NotChecked=0, Total=5700 [2024-11-20 14:42:33,831 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 438 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-20 14:42:33,831 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [438 Valid, 197 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-20 14:42:33,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1031 states. [2024-11-20 14:42:33,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1031 to 911. [2024-11-20 14:42:33,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 911 states, 909 states have (on average 1.0880088008800881) internal successors, (989), 910 states have internal predecessors, (989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:42:33,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 911 states to 911 states and 989 transitions. [2024-11-20 14:42:33,843 INFO L78 Accepts]: Start accepts. Automaton has 911 states and 989 transitions. Word has length 266 [2024-11-20 14:42:33,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:42:33,844 INFO L471 AbstractCegarLoop]: Abstraction has 911 states and 989 transitions. [2024-11-20 14:42:33,844 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 9.625) internal successors, (231), 24 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:42:33,844 INFO L276 IsEmpty]: Start isEmpty. Operand 911 states and 989 transitions. [2024-11-20 14:42:33,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2024-11-20 14:42:33,845 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:42:33,846 INFO L215 NwaCegarLoop]: trace histogram [28, 28, 28, 28, 28, 25, 25, 25, 25, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 6, 2, 1, 1, 1] [2024-11-20 14:42:33,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-11-20 14:42:34,046 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-11-20 14:42:34,046 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-20 14:42:34,047 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:42:34,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1667140210, now seen corresponding path program 7 times [2024-11-20 14:42:34,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:42:34,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908236837] [2024-11-20 14:42:34,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:42:34,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:42:34,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:42:34,815 INFO L134 CoverageAnalysis]: Checked inductivity of 3808 backedges. 2188 proven. 1157 refuted. 0 times theorem prover too weak. 463 trivial. 0 not checked. [2024-11-20 14:42:34,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:42:34,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908236837] [2024-11-20 14:42:34,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908236837] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:42:34,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022968990] [2024-11-20 14:42:34,816 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-20 14:42:34,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:42:34,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:42:34,817 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 14:42:34,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-20 14:42:35,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:42:35,157 INFO L255 TraceCheckSpWp]: Trace formula consists of 1399 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-20 14:42:35,161 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 14:42:35,529 INFO L134 CoverageAnalysis]: Checked inductivity of 3808 backedges. 1686 proven. 1593 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2024-11-20 14:42:35,530 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 14:42:35,926 INFO L134 CoverageAnalysis]: Checked inductivity of 3808 backedges. 1686 proven. 1593 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2024-11-20 14:42:35,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022968990] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 14:42:35,927 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 14:42:35,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2024-11-20 14:42:35,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926496799] [2024-11-20 14:42:35,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 14:42:35,928 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-11-20 14:42:35,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:42:35,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-11-20 14:42:35,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1133, Unknown=0, NotChecked=0, Total=1332 [2024-11-20 14:42:35,929 INFO L87 Difference]: Start difference. First operand 911 states and 989 transitions. Second operand has 37 states, 37 states have (on average 9.162162162162161) internal successors, (339), 37 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:42:37,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:42:37,219 INFO L93 Difference]: Finished difference Result 1110 states and 1193 transitions. [2024-11-20 14:42:37,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2024-11-20 14:42:37,219 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 9.162162162162161) internal successors, (339), 37 states have internal predecessors, (339), 0 states have call successors, (0), 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 328 [2024-11-20 14:42:37,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:42:37,223 INFO L225 Difference]: With dead ends: 1110 [2024-11-20 14:42:37,223 INFO L226 Difference]: Without dead ends: 1110 [2024-11-20 14:42:37,225 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 724 GetRequests, 628 SyntacticMatches, 7 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2028 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1414, Invalid=6776, Unknown=0, NotChecked=0, Total=8190 [2024-11-20 14:42:37,225 INFO L432 NwaCegarLoop]: 73 mSDtfsCounter, 733 mSDsluCounter, 540 mSDsCounter, 0 mSdLazyCounter, 1535 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 733 SdHoareTripleChecker+Valid, 613 SdHoareTripleChecker+Invalid, 1567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-20 14:42:37,226 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [733 Valid, 613 Invalid, 1567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1535 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-20 14:42:37,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1110 states. [2024-11-20 14:42:37,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1110 to 1028. [2024-11-20 14:42:37,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1028 states, 1026 states have (on average 1.0789473684210527) internal successors, (1107), 1027 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:42:37,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1028 states to 1028 states and 1107 transitions. [2024-11-20 14:42:37,242 INFO L78 Accepts]: Start accepts. Automaton has 1028 states and 1107 transitions. Word has length 328 [2024-11-20 14:42:37,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:42:37,243 INFO L471 AbstractCegarLoop]: Abstraction has 1028 states and 1107 transitions. [2024-11-20 14:42:37,243 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 9.162162162162161) internal successors, (339), 37 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:42:37,244 INFO L276 IsEmpty]: Start isEmpty. Operand 1028 states and 1107 transitions. [2024-11-20 14:42:37,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 397 [2024-11-20 14:42:37,247 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:42:37,247 INFO L215 NwaCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 33, 33, 33, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 7, 2, 1, 1, 1] [2024-11-20 14:42:37,256 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-11-20 14:42:37,448 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-11-20 14:42:37,448 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-20 14:42:37,448 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:42:37,449 INFO L85 PathProgramCache]: Analyzing trace with hash 1929482388, now seen corresponding path program 8 times [2024-11-20 14:42:37,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:42:37,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148019250] [2024-11-20 14:42:37,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:42:37,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:42:37,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:42:38,209 INFO L134 CoverageAnalysis]: Checked inductivity of 5726 backedges. 3842 proven. 567 refuted. 0 times theorem prover too weak. 1317 trivial. 0 not checked. [2024-11-20 14:42:38,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:42:38,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148019250] [2024-11-20 14:42:38,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148019250] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:42:38,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180837739] [2024-11-20 14:42:38,209 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 14:42:38,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:42:38,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:42:38,211 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 14:42:38,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-20 14:42:38,614 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 14:42:38,614 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 14:42:38,619 INFO L255 TraceCheckSpWp]: Trace formula consists of 1653 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-20 14:42:38,623 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 14:42:38,922 INFO L134 CoverageAnalysis]: Checked inductivity of 5726 backedges. 3928 proven. 481 refuted. 0 times theorem prover too weak. 1317 trivial. 0 not checked. [2024-11-20 14:42:38,923 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 14:42:39,181 INFO L134 CoverageAnalysis]: Checked inductivity of 5726 backedges. 3928 proven. 481 refuted. 0 times theorem prover too weak. 1317 trivial. 0 not checked. [2024-11-20 14:42:39,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180837739] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 14:42:39,181 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 14:42:39,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2024-11-20 14:42:39,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679413567] [2024-11-20 14:42:39,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 14:42:39,183 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-20 14:42:39,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:42:39,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-20 14:42:39,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2024-11-20 14:42:39,184 INFO L87 Difference]: Start difference. First operand 1028 states and 1107 transitions. Second operand has 23 states, 23 states have (on average 8.956521739130435) internal successors, (206), 23 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:42:39,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:42:39,599 INFO L93 Difference]: Finished difference Result 785 states and 837 transitions. [2024-11-20 14:42:39,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-20 14:42:39,600 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 8.956521739130435) internal successors, (206), 23 states have internal predecessors, (206), 0 states have call successors, (0), 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 396 [2024-11-20 14:42:39,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:42:39,602 INFO L225 Difference]: With dead ends: 785 [2024-11-20 14:42:39,602 INFO L226 Difference]: Without dead ends: 785 [2024-11-20 14:42:39,603 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 827 GetRequests, 772 SyntacticMatches, 12 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=556, Invalid=1424, Unknown=0, NotChecked=0, Total=1980 [2024-11-20 14:42:39,604 INFO L432 NwaCegarLoop]: 96 mSDtfsCounter, 65 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 480 SdHoareTripleChecker+Invalid, 513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-20 14:42:39,604 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 480 Invalid, 513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 506 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-20 14:42:39,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 785 states. [2024-11-20 14:42:39,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 785 to 785. [2024-11-20 14:42:39,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 785 states, 783 states have (on average 1.0689655172413792) internal successors, (837), 784 states have internal predecessors, (837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:42:39,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 837 transitions. [2024-11-20 14:42:39,613 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 837 transitions. Word has length 396 [2024-11-20 14:42:39,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:42:39,613 INFO L471 AbstractCegarLoop]: Abstraction has 785 states and 837 transitions. [2024-11-20 14:42:39,614 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 8.956521739130435) internal successors, (206), 23 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:42:39,614 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 837 transitions. [2024-11-20 14:42:39,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 407 [2024-11-20 14:42:39,616 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:42:39,616 INFO L215 NwaCegarLoop]: trace histogram [35, 35, 35, 35, 35, 33, 33, 33, 33, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 7, 2, 1, 1, 1] [2024-11-20 14:42:39,627 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-11-20 14:42:39,816 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:42:39,817 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-20 14:42:39,817 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:42:39,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1324857780, now seen corresponding path program 9 times [2024-11-20 14:42:39,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:42:39,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796564485] [2024-11-20 14:42:39,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:42:39,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:42:39,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:42:40,624 INFO L134 CoverageAnalysis]: Checked inductivity of 6079 backedges. 3742 proven. 1680 refuted. 0 times theorem prover too weak. 657 trivial. 0 not checked. [2024-11-20 14:42:40,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:42:40,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796564485] [2024-11-20 14:42:40,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796564485] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:42:40,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128312541] [2024-11-20 14:42:40,624 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-20 14:42:40,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:42:40,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:42:40,627 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 14:42:40,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-20 14:42:41,500 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2024-11-20 14:42:41,500 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 14:42:41,508 INFO L255 TraceCheckSpWp]: Trace formula consists of 1279 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-20 14:42:41,512 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 14:42:41,951 INFO L134 CoverageAnalysis]: Checked inductivity of 6079 backedges. 3168 proven. 2248 refuted. 0 times theorem prover too weak. 663 trivial. 0 not checked. [2024-11-20 14:42:41,951 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 14:42:42,451 INFO L134 CoverageAnalysis]: Checked inductivity of 6079 backedges. 3168 proven. 2248 refuted. 0 times theorem prover too weak. 663 trivial. 0 not checked. [2024-11-20 14:42:42,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128312541] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 14:42:42,452 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 14:42:42,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 29 [2024-11-20 14:42:42,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626849907] [2024-11-20 14:42:42,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 14:42:42,453 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-20 14:42:42,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 14:42:42,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-20 14:42:42,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=643, Unknown=0, NotChecked=0, Total=812 [2024-11-20 14:42:42,454 INFO L87 Difference]: Start difference. First operand 785 states and 837 transitions. Second operand has 29 states, 29 states have (on average 9.137931034482758) internal successors, (265), 29 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:42:42,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-20 14:42:42,980 INFO L93 Difference]: Finished difference Result 849 states and 901 transitions. [2024-11-20 14:42:42,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-20 14:42:42,980 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 9.137931034482758) internal successors, (265), 29 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 406 [2024-11-20 14:42:42,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-20 14:42:42,982 INFO L225 Difference]: With dead ends: 849 [2024-11-20 14:42:42,983 INFO L226 Difference]: Without dead ends: 849 [2024-11-20 14:42:42,983 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 851 GetRequests, 786 SyntacticMatches, 15 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=674, Invalid=1978, Unknown=0, NotChecked=0, Total=2652 [2024-11-20 14:42:42,984 INFO L432 NwaCegarLoop]: 120 mSDtfsCounter, 108 mSDsluCounter, 941 mSDsCounter, 0 mSdLazyCounter, 727 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 1061 SdHoareTripleChecker+Invalid, 730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-20 14:42:42,984 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 1061 Invalid, 730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 727 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-20 14:42:42,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 849 states. [2024-11-20 14:42:42,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 849 to 817. [2024-11-20 14:42:42,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 817 states, 815 states have (on average 1.0662576687116565) internal successors, (869), 816 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:42:42,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 817 states to 817 states and 869 transitions. [2024-11-20 14:42:42,994 INFO L78 Accepts]: Start accepts. Automaton has 817 states and 869 transitions. Word has length 406 [2024-11-20 14:42:42,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-20 14:42:42,994 INFO L471 AbstractCegarLoop]: Abstraction has 817 states and 869 transitions. [2024-11-20 14:42:42,995 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 9.137931034482758) internal successors, (265), 29 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 14:42:42,995 INFO L276 IsEmpty]: Start isEmpty. Operand 817 states and 869 transitions. [2024-11-20 14:42:42,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 415 [2024-11-20 14:42:42,997 INFO L207 NwaCegarLoop]: Found error trace [2024-11-20 14:42:42,997 INFO L215 NwaCegarLoop]: trace histogram [35, 35, 35, 35, 35, 35, 35, 35, 35, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 7, 2, 1, 1, 1] [2024-11-20 14:42:43,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2024-11-20 14:42:43,199 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-11-20 14:42:43,199 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2024-11-20 14:42:43,199 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 14:42:43,200 INFO L85 PathProgramCache]: Analyzing trace with hash -630073836, now seen corresponding path program 10 times [2024-11-20 14:42:43,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 14:42:43,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811995955] [2024-11-20 14:42:43,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 14:42:43,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 14:42:43,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 14:42:44,220 INFO L134 CoverageAnalysis]: Checked inductivity of 6365 backedges. 2589 proven. 2908 refuted. 0 times theorem prover too weak. 868 trivial. 0 not checked. [2024-11-20 14:42:44,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 14:42:44,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811995955] [2024-11-20 14:42:44,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811995955] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 14:42:44,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6623443] [2024-11-20 14:42:44,221 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-20 14:42:44,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 14:42:44,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 14:42:44,222 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 14:42:44,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process