./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/valid-memsafety.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-memory-alloca/openbsd_cstrspn-alloca-1.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a046e57d 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/termination-memory-alloca/openbsd_cstrspn-alloca-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-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 64bit --witnessprinter.graph.data.programhash e3b4fa4839d843c17aca38b087d008ecb7fb2a74ec53840f4a61df0dde2a3794 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-mul-div-a046e57-m [2024-10-13 10:34:51,603 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-13 10:34:51,662 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2024-10-13 10:34:51,669 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-13 10:34:51,670 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-13 10:34:51,691 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-13 10:34:51,693 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-13 10:34:51,693 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-13 10:34:51,693 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-13 10:34:51,694 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-13 10:34:51,694 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-13 10:34:51,694 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-13 10:34:51,695 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-13 10:34:51,695 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-13 10:34:51,695 INFO L153 SettingsManager]: * Use SBE=true [2024-10-13 10:34:51,695 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-13 10:34:51,695 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-13 10:34:51,696 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-13 10:34:51,696 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-13 10:34:51,698 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-13 10:34:51,700 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-13 10:34:51,701 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-13 10:34:51,701 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-13 10:34:51,701 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-13 10:34:51,702 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-13 10:34:51,702 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-13 10:34:51,702 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-13 10:34:51,704 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-13 10:34:51,704 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-13 10:34:51,704 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-13 10:34:51,704 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 10:34:51,705 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-13 10:34:51,705 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-13 10:34:51,705 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-13 10:34:51,705 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-13 10:34:51,705 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-13 10:34:51,705 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-13 10:34:51,706 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-13 10:34:51,706 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-13 10:34:51,706 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e3b4fa4839d843c17aca38b087d008ecb7fb2a74ec53840f4a61df0dde2a3794 [2024-10-13 10:34:51,915 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-13 10:34:51,934 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-13 10:34:51,937 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-13 10:34:51,939 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-13 10:34:51,939 INFO L274 PluginConnector]: CDTParser initialized [2024-10-13 10:34:51,941 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-memory-alloca/openbsd_cstrspn-alloca-1.i [2024-10-13 10:34:53,202 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-13 10:34:53,390 INFO L384 CDTParser]: Found 1 translation units. [2024-10-13 10:34:53,390 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-memory-alloca/openbsd_cstrspn-alloca-1.i [2024-10-13 10:34:53,400 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c7d044af/d1cfb47d06974f81bf70cc5864bb38e3/FLAGceac73e81 [2024-10-13 10:34:53,758 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c7d044af/d1cfb47d06974f81bf70cc5864bb38e3 [2024-10-13 10:34:53,760 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-13 10:34:53,761 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-13 10:34:53,763 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-13 10:34:53,763 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-13 10:34:53,771 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-13 10:34:53,772 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:34:53" (1/1) ... [2024-10-13 10:34:53,773 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30cc9f53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:34:53, skipping insertion in model container [2024-10-13 10:34:53,773 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:34:53" (1/1) ... [2024-10-13 10:34:53,806 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-13 10:34:54,060 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 10:34:54,071 INFO L200 MainTranslator]: Completed pre-run [2024-10-13 10:34:54,114 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 10:34:54,140 INFO L204 MainTranslator]: Completed translation [2024-10-13 10:34:54,141 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:34:54 WrapperNode [2024-10-13 10:34:54,141 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-13 10:34:54,142 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-13 10:34:54,142 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-13 10:34:54,142 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-13 10:34:54,148 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:34:54" (1/1) ... [2024-10-13 10:34:54,161 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:34:54" (1/1) ... [2024-10-13 10:34:54,180 INFO L138 Inliner]: procedures = 111, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 63 [2024-10-13 10:34:54,181 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-13 10:34:54,182 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-13 10:34:54,182 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-13 10:34:54,182 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-13 10:34:54,190 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:34:54" (1/1) ... [2024-10-13 10:34:54,190 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:34:54" (1/1) ... [2024-10-13 10:34:54,192 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:34:54" (1/1) ... [2024-10-13 10:34:54,206 INFO L175 MemorySlicer]: Split 4 memory accesses to 2 slices as follows [2, 2]. 50 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]. [2024-10-13 10:34:54,206 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:34:54" (1/1) ... [2024-10-13 10:34:54,206 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:34:54" (1/1) ... [2024-10-13 10:34:54,211 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:34:54" (1/1) ... [2024-10-13 10:34:54,214 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:34:54" (1/1) ... [2024-10-13 10:34:54,215 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:34:54" (1/1) ... [2024-10-13 10:34:54,216 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:34:54" (1/1) ... [2024-10-13 10:34:54,217 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-13 10:34:54,218 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-13 10:34:54,218 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-13 10:34:54,218 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-13 10:34:54,219 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:34:54" (1/1) ... [2024-10-13 10:34:54,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 10:34:54,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 10:34:54,255 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-13 10:34:54,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-13 10:34:54,292 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-13 10:34:54,292 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-13 10:34:54,292 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-13 10:34:54,292 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-13 10:34:54,292 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-13 10:34:54,292 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-13 10:34:54,292 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-13 10:34:54,293 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-13 10:34:54,403 INFO L238 CfgBuilder]: Building ICFG [2024-10-13 10:34:54,405 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-13 10:34:54,530 INFO L? ?]: Removed 44 outVars from TransFormulas that were not future-live. [2024-10-13 10:34:54,530 INFO L287 CfgBuilder]: Performing block encoding [2024-10-13 10:34:54,561 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-13 10:34:54,561 INFO L314 CfgBuilder]: Removed 1 assume(true) statements. [2024-10-13 10:34:54,561 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:34:54 BoogieIcfgContainer [2024-10-13 10:34:54,563 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-13 10:34:54,565 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-13 10:34:54,565 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-13 10:34:54,568 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-13 10:34:54,568 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 10:34:53" (1/3) ... [2024-10-13 10:34:54,568 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b2a40c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:34:54, skipping insertion in model container [2024-10-13 10:34:54,568 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:34:54" (2/3) ... [2024-10-13 10:34:54,569 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b2a40c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:34:54, skipping insertion in model container [2024-10-13 10:34:54,569 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:34:54" (3/3) ... [2024-10-13 10:34:54,570 INFO L112 eAbstractionObserver]: Analyzing ICFG openbsd_cstrspn-alloca-1.i [2024-10-13 10:34:54,582 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-13 10:34:54,582 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2024-10-13 10:34:54,613 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-13 10:34:54,619 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;@2a0e24d0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-13 10:34:54,619 INFO L334 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2024-10-13 10:34:54,622 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 14 states have (on average 2.0) internal successors, (28), 23 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:34:54,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-10-13 10:34:54,626 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:34:54,628 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-10-13 10:34:54,629 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-10-13 10:34:54,634 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:34:54,634 INFO L85 PathProgramCache]: Analyzing trace with hash 82353377, now seen corresponding path program 1 times [2024-10-13 10:34:54,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:34:54,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482596783] [2024-10-13 10:34:54,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:34:54,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:34:54,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:34:54,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:34:54,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:34:54,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482596783] [2024-10-13 10:34:54,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482596783] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 10:34:54,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 10:34:54,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 10:34:54,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991649257] [2024-10-13 10:34:54,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 10:34:54,928 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 10:34:54,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:34:54,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 10:34:54,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 10:34:54,962 INFO L87 Difference]: Start difference. First operand has 24 states, 14 states have (on average 2.0) internal successors, (28), 23 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 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) [2024-10-13 10:34:55,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:34:55,003 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2024-10-13 10:34:55,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 10:34:55,020 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 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 [2024-10-13 10:34:55,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:34:55,025 INFO L225 Difference]: With dead ends: 23 [2024-10-13 10:34:55,025 INFO L226 Difference]: Without dead ends: 22 [2024-10-13 10:34:55,027 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 10:34:55,029 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 3 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 10:34:55,030 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 29 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 10:34:55,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-10-13 10:34:55,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2024-10-13 10:34:55,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 21 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:34:55,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2024-10-13 10:34:55,058 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 5 [2024-10-13 10:34:55,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:34:55,058 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2024-10-13 10:34:55,058 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 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) [2024-10-13 10:34:55,059 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2024-10-13 10:34:55,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-10-13 10:34:55,059 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:34:55,059 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-10-13 10:34:55,059 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-13 10:34:55,060 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-10-13 10:34:55,060 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:34:55,061 INFO L85 PathProgramCache]: Analyzing trace with hash 82353378, now seen corresponding path program 1 times [2024-10-13 10:34:55,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:34:55,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059299893] [2024-10-13 10:34:55,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:34:55,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:34:55,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:34:55,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:34:55,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:34:55,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059299893] [2024-10-13 10:34:55,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059299893] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 10:34:55,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 10:34:55,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 10:34:55,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372095885] [2024-10-13 10:34:55,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 10:34:55,326 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 10:34:55,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:34:55,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 10:34:55,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-13 10:34:55,332 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) 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) [2024-10-13 10:34:55,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:34:55,361 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2024-10-13 10:34:55,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 10:34:55,362 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) 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 [2024-10-13 10:34:55,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:34:55,363 INFO L225 Difference]: With dead ends: 25 [2024-10-13 10:34:55,363 INFO L226 Difference]: Without dead ends: 25 [2024-10-13 10:34:55,363 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-13 10:34:55,364 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 1 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 10:34:55,365 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 35 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 10:34:55,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-10-13 10:34:55,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2024-10-13 10:34:55,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:34:55,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2024-10-13 10:34:55,371 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 5 [2024-10-13 10:34:55,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:34:55,371 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2024-10-13 10:34:55,371 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) 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) [2024-10-13 10:34:55,372 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2024-10-13 10:34:55,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-10-13 10:34:55,372 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:34:55,372 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-10-13 10:34:55,372 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-13 10:34:55,372 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-10-13 10:34:55,373 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:34:55,374 INFO L85 PathProgramCache]: Analyzing trace with hash 82412960, now seen corresponding path program 1 times [2024-10-13 10:34:55,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:34:55,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118321343] [2024-10-13 10:34:55,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:34:55,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:34:55,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:34:55,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:34:55,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:34:55,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118321343] [2024-10-13 10:34:55,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118321343] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 10:34:55,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 10:34:55,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 10:34:55,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921619947] [2024-10-13 10:34:55,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 10:34:55,538 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-13 10:34:55,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:34:55,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-13 10:34:55,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-10-13 10:34:55,540 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 5 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) [2024-10-13 10:34:55,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:34:55,567 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2024-10-13 10:34:55,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-13 10:34:55,568 INFO L78 Accepts]: Start accepts. Automaton has has 5 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 [2024-10-13 10:34:55,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:34:55,568 INFO L225 Difference]: With dead ends: 24 [2024-10-13 10:34:55,569 INFO L226 Difference]: Without dead ends: 24 [2024-10-13 10:34:55,569 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-10-13 10:34:55,570 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 1 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 10:34:55,570 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 43 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 10:34:55,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-10-13 10:34:55,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2024-10-13 10:34:55,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:34:55,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2024-10-13 10:34:55,574 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 5 [2024-10-13 10:34:55,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:34:55,575 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2024-10-13 10:34:55,575 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 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) [2024-10-13 10:34:55,575 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2024-10-13 10:34:55,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-10-13 10:34:55,578 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:34:55,578 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-13 10:34:55,578 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-13 10:34:55,578 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-10-13 10:34:55,579 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:34:55,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1742012620, now seen corresponding path program 1 times [2024-10-13 10:34:55,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:34:55,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455253062] [2024-10-13 10:34:55,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:34:55,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:34:55,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:34:55,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:34:55,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:34:55,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455253062] [2024-10-13 10:34:55,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455253062] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 10:34:55,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 10:34:55,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 10:34:55,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495355681] [2024-10-13 10:34:55,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 10:34:55,621 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 10:34:55,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:34:55,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 10:34:55,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 10:34:55,623 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:34:55,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:34:55,643 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2024-10-13 10:34:55,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 10:34:55,644 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-10-13 10:34:55,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:34:55,644 INFO L225 Difference]: With dead ends: 20 [2024-10-13 10:34:55,644 INFO L226 Difference]: Without dead ends: 20 [2024-10-13 10:34:55,645 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 10:34:55,645 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 10:34:55,646 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 10:34:55,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2024-10-13 10:34:55,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2024-10-13 10:34:55,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 19 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:34:55,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2024-10-13 10:34:55,649 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 6 [2024-10-13 10:34:55,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:34:55,650 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2024-10-13 10:34:55,650 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:34:55,650 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2024-10-13 10:34:55,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-10-13 10:34:55,651 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:34:55,651 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-13 10:34:55,651 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-13 10:34:55,651 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-10-13 10:34:55,651 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:34:55,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1742012619, now seen corresponding path program 1 times [2024-10-13 10:34:55,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:34:55,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808448982] [2024-10-13 10:34:55,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:34:55,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:34:55,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:34:55,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:34:55,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:34:55,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808448982] [2024-10-13 10:34:55,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808448982] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 10:34:55,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 10:34:55,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 10:34:55,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028988609] [2024-10-13 10:34:55,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 10:34:55,756 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 10:34:55,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:34:55,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 10:34:55,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-13 10:34:55,757 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:34:55,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:34:55,790 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2024-10-13 10:34:55,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 10:34:55,791 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-10-13 10:34:55,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:34:55,791 INFO L225 Difference]: With dead ends: 23 [2024-10-13 10:34:55,792 INFO L226 Difference]: Without dead ends: 23 [2024-10-13 10:34:55,792 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-13 10:34:55,792 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 10:34:55,793 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 10:34:55,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2024-10-13 10:34:55,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2024-10-13 10:34:55,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 22 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:34:55,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2024-10-13 10:34:55,799 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 6 [2024-10-13 10:34:55,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:34:55,799 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2024-10-13 10:34:55,799 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:34:55,800 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2024-10-13 10:34:55,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-10-13 10:34:55,800 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:34:55,800 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-13 10:34:55,800 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-13 10:34:55,801 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-10-13 10:34:55,801 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:34:55,802 INFO L85 PathProgramCache]: Analyzing trace with hash -1741953037, now seen corresponding path program 1 times [2024-10-13 10:34:55,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:34:55,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186341563] [2024-10-13 10:34:55,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:34:55,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:34:55,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:34:55,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:34:55,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:34:55,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186341563] [2024-10-13 10:34:55,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186341563] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 10:34:55,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 10:34:55,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 10:34:55,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241467160] [2024-10-13 10:34:55,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 10:34:55,911 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-13 10:34:55,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:34:55,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-13 10:34:55,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-10-13 10:34:55,912 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:34:55,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:34:55,932 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2024-10-13 10:34:55,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-13 10:34:55,932 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-10-13 10:34:55,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:34:55,933 INFO L225 Difference]: With dead ends: 22 [2024-10-13 10:34:55,933 INFO L226 Difference]: Without dead ends: 22 [2024-10-13 10:34:55,933 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-10-13 10:34:55,934 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 1 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 10:34:55,934 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 28 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 10:34:55,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-10-13 10:34:55,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 19. [2024-10-13 10:34:55,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:34:55,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2024-10-13 10:34:55,939 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 6 [2024-10-13 10:34:55,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:34:55,939 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2024-10-13 10:34:55,939 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:34:55,939 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2024-10-13 10:34:55,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-10-13 10:34:55,940 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:34:55,940 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:34:55,940 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-13 10:34:55,940 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-10-13 10:34:55,940 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:34:55,940 INFO L85 PathProgramCache]: Analyzing trace with hash 963158752, now seen corresponding path program 1 times [2024-10-13 10:34:55,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:34:55,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266670533] [2024-10-13 10:34:55,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:34:55,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:34:55,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:34:55,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:34:55,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:34:55,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266670533] [2024-10-13 10:34:55,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266670533] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 10:34:55,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 10:34:55,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-13 10:34:55,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965159337] [2024-10-13 10:34:55,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 10:34:55,994 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-13 10:34:55,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:34:55,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-13 10:34:55,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-13 10:34:55,995 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:34:56,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:34:56,029 INFO L93 Difference]: Finished difference Result 18 states and 21 transitions. [2024-10-13 10:34:56,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-13 10:34:56,029 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-10-13 10:34:56,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:34:56,030 INFO L225 Difference]: With dead ends: 18 [2024-10-13 10:34:56,030 INFO L226 Difference]: Without dead ends: 18 [2024-10-13 10:34:56,030 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-13 10:34:56,031 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 10 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 10:34:56,031 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 36 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 10:34:56,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2024-10-13 10:34:56,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2024-10-13 10:34:56,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 14 states have (on average 1.5) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:34:56,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2024-10-13 10:34:56,033 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 8 [2024-10-13 10:34:56,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:34:56,034 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2024-10-13 10:34:56,034 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:34:56,034 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2024-10-13 10:34:56,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-10-13 10:34:56,034 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:34:56,034 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:34:56,034 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-13 10:34:56,035 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-10-13 10:34:56,035 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:34:56,035 INFO L85 PathProgramCache]: Analyzing trace with hash 963158753, now seen corresponding path program 1 times [2024-10-13 10:34:56,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:34:56,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103252924] [2024-10-13 10:34:56,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:34:56,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:34:56,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:34:56,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:34:56,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:34:56,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103252924] [2024-10-13 10:34:56,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103252924] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 10:34:56,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 10:34:56,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-13 10:34:56,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617761157] [2024-10-13 10:34:56,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 10:34:56,143 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-13 10:34:56,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:34:56,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-13 10:34:56,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-10-13 10:34:56,144 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:34:56,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:34:56,179 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2024-10-13 10:34:56,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-13 10:34:56,180 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-10-13 10:34:56,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:34:56,181 INFO L225 Difference]: With dead ends: 20 [2024-10-13 10:34:56,181 INFO L226 Difference]: Without dead ends: 20 [2024-10-13 10:34:56,181 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-10-13 10:34:56,182 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 1 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 10:34:56,182 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 57 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 10:34:56,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2024-10-13 10:34:56,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2024-10-13 10:34:56,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 16 states have (on average 1.4375) internal successors, (23), 19 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:34:56,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2024-10-13 10:34:56,186 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 8 [2024-10-13 10:34:56,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:34:56,186 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2024-10-13 10:34:56,186 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:34:56,186 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2024-10-13 10:34:56,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-10-13 10:34:56,187 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:34:56,187 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:34:56,187 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-13 10:34:56,187 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-10-13 10:34:56,187 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:34:56,187 INFO L85 PathProgramCache]: Analyzing trace with hash -2117341564, now seen corresponding path program 1 times [2024-10-13 10:34:56,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:34:56,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546600660] [2024-10-13 10:34:56,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:34:56,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:34:56,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:34:56,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:34:56,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:34:56,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546600660] [2024-10-13 10:34:56,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546600660] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 10:34:56,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 10:34:56,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-13 10:34:56,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489831965] [2024-10-13 10:34:56,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 10:34:56,241 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-13 10:34:56,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:34:56,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-13 10:34:56,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-13 10:34:56,242 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:34:56,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:34:56,280 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2024-10-13 10:34:56,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-13 10:34:56,282 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-10-13 10:34:56,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:34:56,283 INFO L225 Difference]: With dead ends: 19 [2024-10-13 10:34:56,283 INFO L226 Difference]: Without dead ends: 19 [2024-10-13 10:34:56,283 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-10-13 10:34:56,283 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 17 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 10:34:56,283 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 32 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 10:34:56,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2024-10-13 10:34:56,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2024-10-13 10:34:56,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 16 states have (on average 1.375) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:34:56,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2024-10-13 10:34:56,285 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 10 [2024-10-13 10:34:56,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:34:56,286 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2024-10-13 10:34:56,286 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:34:56,286 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2024-10-13 10:34:56,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-10-13 10:34:56,286 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:34:56,286 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:34:56,286 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-13 10:34:56,287 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-10-13 10:34:56,287 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:34:56,287 INFO L85 PathProgramCache]: Analyzing trace with hash -2117341563, now seen corresponding path program 1 times [2024-10-13 10:34:56,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:34:56,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483076576] [2024-10-13 10:34:56,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:34:56,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:34:56,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:34:56,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:34:56,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:34:56,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483076576] [2024-10-13 10:34:56,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483076576] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 10:34:56,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 10:34:56,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-13 10:34:56,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838375400] [2024-10-13 10:34:56,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 10:34:56,415 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-13 10:34:56,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:34:56,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-13 10:34:56,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-10-13 10:34:56,416 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:34:56,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:34:56,475 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2024-10-13 10:34:56,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-13 10:34:56,476 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-10-13 10:34:56,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:34:56,477 INFO L225 Difference]: With dead ends: 21 [2024-10-13 10:34:56,477 INFO L226 Difference]: Without dead ends: 21 [2024-10-13 10:34:56,477 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-10-13 10:34:56,478 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 10:34:56,478 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 49 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 10:34:56,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-10-13 10:34:56,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2024-10-13 10:34:56,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:34:56,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2024-10-13 10:34:56,480 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 10 [2024-10-13 10:34:56,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:34:56,481 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2024-10-13 10:34:56,481 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:34:56,481 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2024-10-13 10:34:56,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-10-13 10:34:56,481 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:34:56,482 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:34:56,482 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-10-13 10:34:56,482 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-10-13 10:34:56,482 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:34:56,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1831980224, now seen corresponding path program 1 times [2024-10-13 10:34:56,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:34:56,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036965154] [2024-10-13 10:34:56,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:34:56,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:34:56,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:34:56,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:34:56,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:34:56,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036965154] [2024-10-13 10:34:56,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036965154] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 10:34:56,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 10:34:56,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 10:34:56,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151632341] [2024-10-13 10:34:56,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 10:34:56,605 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 10:34:56,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:34:56,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 10:34:56,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-13 10:34:56,606 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:34:56,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:34:56,618 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2024-10-13 10:34:56,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 10:34:56,619 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-10-13 10:34:56,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:34:56,619 INFO L225 Difference]: With dead ends: 20 [2024-10-13 10:34:56,619 INFO L226 Difference]: Without dead ends: 18 [2024-10-13 10:34:56,619 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-13 10:34:56,620 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 10:34:56,620 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 24 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 10:34:56,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2024-10-13 10:34:56,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2024-10-13 10:34:56,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 16 states have (on average 1.3125) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:34:56,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2024-10-13 10:34:56,622 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 13 [2024-10-13 10:34:56,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:34:56,622 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2024-10-13 10:34:56,622 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:34:56,622 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2024-10-13 10:34:56,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-10-13 10:34:56,622 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:34:56,623 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:34:56,623 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-10-13 10:34:56,623 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-10-13 10:34:56,623 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:34:56,623 INFO L85 PathProgramCache]: Analyzing trace with hash -956771707, now seen corresponding path program 1 times [2024-10-13 10:34:56,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:34:56,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009515366] [2024-10-13 10:34:56,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:34:56,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:34:56,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:34:56,759 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:34:56,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:34:56,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009515366] [2024-10-13 10:34:56,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009515366] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 10:34:56,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 10:34:56,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-10-13 10:34:56,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803863373] [2024-10-13 10:34:56,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 10:34:56,760 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-13 10:34:56,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:34:56,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-13 10:34:56,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-10-13 10:34:56,761 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:34:56,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:34:56,811 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2024-10-13 10:34:56,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-13 10:34:56,812 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-10-13 10:34:56,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:34:56,812 INFO L225 Difference]: With dead ends: 31 [2024-10-13 10:34:56,812 INFO L226 Difference]: Without dead ends: 31 [2024-10-13 10:34:56,813 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-10-13 10:34:56,813 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 4 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 10:34:56,813 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 64 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 10:34:56,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-10-13 10:34:56,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2024-10-13 10:34:56,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 28 states have (on average 1.25) internal successors, (35), 29 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:34:56,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2024-10-13 10:34:56,815 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 14 [2024-10-13 10:34:56,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:34:56,816 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2024-10-13 10:34:56,816 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:34:56,816 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2024-10-13 10:34:56,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-10-13 10:34:56,816 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:34:56,816 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:34:56,816 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-10-13 10:34:56,816 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-10-13 10:34:56,817 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:34:56,817 INFO L85 PathProgramCache]: Analyzing trace with hash -956769529, now seen corresponding path program 1 times [2024-10-13 10:34:56,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:34:56,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096586256] [2024-10-13 10:34:56,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:34:56,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:34:56,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:34:56,921 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:34:56,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:34:56,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096586256] [2024-10-13 10:34:56,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096586256] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 10:34:56,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 10:34:56,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-10-13 10:34:56,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549118340] [2024-10-13 10:34:56,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 10:34:56,922 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-13 10:34:56,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:34:56,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-13 10:34:56,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-10-13 10:34:56,923 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:34:56,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:34:56,973 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2024-10-13 10:34:56,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-13 10:34:56,974 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-10-13 10:34:56,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:34:56,974 INFO L225 Difference]: With dead ends: 46 [2024-10-13 10:34:56,974 INFO L226 Difference]: Without dead ends: 30 [2024-10-13 10:34:56,974 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-10-13 10:34:56,975 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 3 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 10:34:56,975 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 69 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 10:34:56,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-10-13 10:34:56,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2024-10-13 10:34:56,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 29 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:34:56,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2024-10-13 10:34:56,977 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 14 [2024-10-13 10:34:56,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:34:56,977 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2024-10-13 10:34:56,977 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:34:56,977 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2024-10-13 10:34:56,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-10-13 10:34:56,978 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:34:56,978 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:34:56,978 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-10-13 10:34:56,978 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-10-13 10:34:56,979 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:34:56,979 INFO L85 PathProgramCache]: Analyzing trace with hash -698604091, now seen corresponding path program 1 times [2024-10-13 10:34:56,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:34:56,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386289523] [2024-10-13 10:34:56,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:34:56,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:34:56,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:34:57,230 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:34:57,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:34:57,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386289523] [2024-10-13 10:34:57,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386289523] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 10:34:57,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771966220] [2024-10-13 10:34:57,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:34:57,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:34:57,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 10:34:57,234 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 10:34:57,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-13 10:34:57,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:34:57,311 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-10-13 10:34:57,317 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 10:34:57,375 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-10-13 10:34:57,560 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 10:34:57,560 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 17 [2024-10-13 10:34:57,617 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:34:57,617 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 10:34:57,818 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2024-10-13 10:34:57,822 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-13 10:34:57,829 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2024-10-13 10:34:57,839 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:34:57,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771966220] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 10:34:57,839 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 10:34:57,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2024-10-13 10:34:57,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652914236] [2024-10-13 10:34:57,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 10:34:57,840 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-13 10:34:57,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:34:57,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-13 10:34:57,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2024-10-13 10:34:57,841 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 20 states, 19 states have (on average 1.631578947368421) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:34:58,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:34:58,140 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2024-10-13 10:34:58,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-13 10:34:58,141 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.631578947368421) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-10-13 10:34:58,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:34:58,141 INFO L225 Difference]: With dead ends: 41 [2024-10-13 10:34:58,141 INFO L226 Difference]: Without dead ends: 41 [2024-10-13 10:34:58,142 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2024-10-13 10:34:58,142 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 60 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 10:34:58,143 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 78 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 10:34:58,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-10-13 10:34:58,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2024-10-13 10:34:58,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 37 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:34:58,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2024-10-13 10:34:58,145 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 14 [2024-10-13 10:34:58,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:34:58,146 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2024-10-13 10:34:58,146 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.631578947368421) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:34:58,146 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2024-10-13 10:34:58,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-10-13 10:34:58,146 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:34:58,146 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:34:58,161 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-13 10:34:58,347 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-10-13 10:34:58,348 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-10-13 10:34:58,348 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:34:58,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1285412283, now seen corresponding path program 1 times [2024-10-13 10:34:58,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:34:58,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211831984] [2024-10-13 10:34:58,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:34:58,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:34:58,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:34:58,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:34:58,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:34:58,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211831984] [2024-10-13 10:34:58,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211831984] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 10:34:58,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900812053] [2024-10-13 10:34:58,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:34:58,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:34:58,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 10:34:58,597 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 10:34:58,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-13 10:34:58,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:34:58,650 INFO L255 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-10-13 10:34:58,652 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 10:34:58,660 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-10-13 10:34:58,773 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 10:34:58,773 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 17 [2024-10-13 10:34:58,832 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-10-13 10:34:58,876 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:34:58,876 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 10:34:58,995 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 16 treesize of output 8 [2024-10-13 10:34:59,148 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2024-10-13 10:34:59,152 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-13 10:34:59,162 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2024-10-13 10:34:59,169 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:34:59,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900812053] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 10:34:59,169 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 10:34:59,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 23 [2024-10-13 10:34:59,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318344665] [2024-10-13 10:34:59,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 10:34:59,171 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-13 10:34:59,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:34:59,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-13 10:34:59,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2024-10-13 10:34:59,172 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 24 states, 23 states have (on average 1.434782608695652) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:34:59,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:34:59,362 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2024-10-13 10:34:59,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-13 10:34:59,363 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.434782608695652) internal successors, (33), 24 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 14 [2024-10-13 10:34:59,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:34:59,363 INFO L225 Difference]: With dead ends: 51 [2024-10-13 10:34:59,363 INFO L226 Difference]: Without dead ends: 51 [2024-10-13 10:34:59,363 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2024-10-13 10:34:59,364 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 5 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 10:34:59,364 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 71 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 10:34:59,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-10-13 10:34:59,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2024-10-13 10:34:59,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 48 states have (on average 1.1875) internal successors, (57), 49 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:34:59,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2024-10-13 10:34:59,367 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 14 [2024-10-13 10:34:59,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:34:59,367 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2024-10-13 10:34:59,367 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.434782608695652) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:34:59,367 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2024-10-13 10:34:59,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-10-13 10:34:59,368 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:34:59,368 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:34:59,381 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-13 10:34:59,568 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,SelfDestructingSolverStorable14 [2024-10-13 10:34:59,569 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-10-13 10:34:59,569 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:34:59,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1578857031, now seen corresponding path program 2 times [2024-10-13 10:34:59,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:34:59,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283804125] [2024-10-13 10:34:59,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:34:59,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:34:59,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:34:59,924 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:34:59,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:34:59,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283804125] [2024-10-13 10:34:59,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283804125] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 10:34:59,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795682163] [2024-10-13 10:34:59,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 10:34:59,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:34:59,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 10:34:59,926 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 10:34:59,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-13 10:34:59,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 10:34:59,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 10:34:59,980 INFO L255 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-10-13 10:34:59,985 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 10:35:00,039 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-13 10:35:00,068 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-10-13 10:35:00,166 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-13 10:35:00,168 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 10:35:00,168 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 10 [2024-10-13 10:35:00,538 INFO L349 Elim1Store]: treesize reduction 4, result has 81.8 percent of original size [2024-10-13 10:35:00,538 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 28 [2024-10-13 10:35:00,616 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:35:00,616 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 10:35:01,095 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 33 treesize of output 29 [2024-10-13 10:35:01,102 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 51 [2024-10-13 10:35:01,111 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-13 10:35:01,197 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2024-10-13 10:35:01,201 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2024-10-13 10:35:01,297 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:35:01,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795682163] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 10:35:01,297 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 10:35:01,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15, 15] total 36 [2024-10-13 10:35:01,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114267802] [2024-10-13 10:35:01,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 10:35:01,298 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-10-13 10:35:01,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:35:01,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-10-13 10:35:01,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1218, Unknown=0, NotChecked=0, Total=1332 [2024-10-13 10:35:01,299 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand has 37 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 37 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:35:02,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:35:02,414 INFO L93 Difference]: Finished difference Result 68 states and 76 transitions. [2024-10-13 10:35:02,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-10-13 10:35:02,415 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 37 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2024-10-13 10:35:02,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:35:02,416 INFO L225 Difference]: With dead ends: 68 [2024-10-13 10:35:02,416 INFO L226 Difference]: Without dead ends: 52 [2024-10-13 10:35:02,417 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=310, Invalid=2996, Unknown=0, NotChecked=0, Total=3306 [2024-10-13 10:35:02,417 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 56 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-13 10:35:02,417 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 122 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 480 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-13 10:35:02,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-10-13 10:35:02,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 42. [2024-10-13 10:35:02,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 40 states have (on average 1.225) internal successors, (49), 41 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:35:02,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2024-10-13 10:35:02,422 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 18 [2024-10-13 10:35:02,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:35:02,422 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2024-10-13 10:35:02,422 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 37 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:35:02,422 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2024-10-13 10:35:02,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-10-13 10:35:02,422 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:35:02,422 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:35:02,436 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-13 10:35:02,623 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:35:02,623 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-10-13 10:35:02,624 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:35:02,624 INFO L85 PathProgramCache]: Analyzing trace with hash 895500009, now seen corresponding path program 2 times [2024-10-13 10:35:02,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:35:02,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820118630] [2024-10-13 10:35:02,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:35:02,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:35:02,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:35:02,995 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:35:02,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:35:02,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820118630] [2024-10-13 10:35:02,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820118630] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 10:35:02,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301503111] [2024-10-13 10:35:02,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 10:35:02,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:35:02,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 10:35:02,998 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 10:35:02,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-13 10:35:03,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 10:35:03,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 10:35:03,053 INFO L255 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-10-13 10:35:03,055 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 10:35:03,081 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-10-13 10:35:03,458 INFO L349 Elim1Store]: treesize reduction 4, result has 81.8 percent of original size [2024-10-13 10:35:03,458 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 28 [2024-10-13 10:35:03,562 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:35:03,563 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 10:35:03,976 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2024-10-13 10:35:03,982 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-10-13 10:35:03,990 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 39 [2024-10-13 10:35:04,012 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:35:04,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301503111] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 10:35:04,012 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 10:35:04,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 33 [2024-10-13 10:35:04,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60164180] [2024-10-13 10:35:04,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 10:35:04,013 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-10-13 10:35:04,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:35:04,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-10-13 10:35:04,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1006, Unknown=0, NotChecked=0, Total=1122 [2024-10-13 10:35:04,015 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand has 34 states, 33 states have (on average 1.606060606060606) internal successors, (53), 34 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:35:04,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:35:04,572 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2024-10-13 10:35:04,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-13 10:35:04,573 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.606060606060606) internal successors, (53), 34 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2024-10-13 10:35:04,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:35:04,573 INFO L225 Difference]: With dead ends: 42 [2024-10-13 10:35:04,573 INFO L226 Difference]: Without dead ends: 42 [2024-10-13 10:35:04,574 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=231, Invalid=1839, Unknown=0, NotChecked=0, Total=2070 [2024-10-13 10:35:04,574 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 18 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-13 10:35:04,574 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 95 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-13 10:35:04,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-10-13 10:35:04,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 23. [2024-10-13 10:35:04,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:35:04,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2024-10-13 10:35:04,576 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 20 [2024-10-13 10:35:04,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:35:04,577 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2024-10-13 10:35:04,577 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.606060606060606) internal successors, (53), 34 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:35:04,577 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2024-10-13 10:35:04,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-10-13 10:35:04,577 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 10:35:04,577 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:35:04,591 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-13 10:35:04,781 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-10-13 10:35:04,782 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-10-13 10:35:04,782 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 10:35:04,782 INFO L85 PathProgramCache]: Analyzing trace with hash 1034852555, now seen corresponding path program 1 times [2024-10-13 10:35:04,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 10:35:04,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542493144] [2024-10-13 10:35:04,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:35:04,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 10:35:04,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:35:05,178 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:35:05,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 10:35:05,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542493144] [2024-10-13 10:35:05,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542493144] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 10:35:05,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825396997] [2024-10-13 10:35:05,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 10:35:05,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 10:35:05,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 10:35:05,184 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 10:35:05,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-13 10:35:05,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 10:35:05,239 INFO L255 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-10-13 10:35:05,241 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 10:35:05,260 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-10-13 10:35:05,733 INFO L349 Elim1Store]: treesize reduction 8, result has 75.8 percent of original size [2024-10-13 10:35:05,734 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 39 [2024-10-13 10:35:05,814 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:35:05,814 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 10:35:06,287 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 38 [2024-10-13 10:35:06,297 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 54 [2024-10-13 10:35:06,303 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-10-13 10:35:06,322 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 10:35:06,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825396997] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 10:35:06,322 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 10:35:06,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 14] total 35 [2024-10-13 10:35:06,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207910681] [2024-10-13 10:35:06,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 10:35:06,322 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-10-13 10:35:06,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 10:35:06,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-10-13 10:35:06,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1128, Unknown=0, NotChecked=0, Total=1260 [2024-10-13 10:35:06,324 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 36 states, 35 states have (on average 1.6) internal successors, (56), 36 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:35:08,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 10:35:08,406 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2024-10-13 10:35:08,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-10-13 10:35:08,406 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.6) internal successors, (56), 36 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-10-13 10:35:08,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 10:35:08,406 INFO L225 Difference]: With dead ends: 28 [2024-10-13 10:35:08,406 INFO L226 Difference]: Without dead ends: 0 [2024-10-13 10:35:08,407 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=387, Invalid=2265, Unknown=0, NotChecked=0, Total=2652 [2024-10-13 10:35:08,408 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 74 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-10-13 10:35:08,408 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 99 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-10-13 10:35:08,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-10-13 10:35:08,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-10-13 10:35:08,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:35:08,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-10-13 10:35:08,408 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 22 [2024-10-13 10:35:08,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 10:35:08,408 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-10-13 10:35:08,408 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 1.6) internal successors, (56), 36 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 10:35:08,409 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-10-13 10:35:08,409 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-10-13 10:35:08,411 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 9 remaining) [2024-10-13 10:35:08,411 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 9 remaining) [2024-10-13 10:35:08,411 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 9 remaining) [2024-10-13 10:35:08,412 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 9 remaining) [2024-10-13 10:35:08,412 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 9 remaining) [2024-10-13 10:35:08,412 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 9 remaining) [2024-10-13 10:35:08,412 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 9 remaining) [2024-10-13 10:35:08,412 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 9 remaining) [2024-10-13 10:35:08,412 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK (0 of 9 remaining) [2024-10-13 10:35:08,425 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-13 10:35:08,613 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,SelfDestructingSolverStorable17 [2024-10-13 10:35:08,616 INFO L407 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 10:35:08,618 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-10-13 10:35:08,620 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 10:35:08 BoogieIcfgContainer [2024-10-13 10:35:08,622 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-10-13 10:35:08,623 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-10-13 10:35:08,623 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-10-13 10:35:08,623 INFO L274 PluginConnector]: Witness Printer initialized [2024-10-13 10:35:08,624 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:34:54" (3/4) ... [2024-10-13 10:35:08,626 INFO L139 WitnessPrinter]: Generating witness for correct program [2024-10-13 10:35:08,631 INFO L904 BoogieBacktranslator]: Reduced CFG by removing 14 nodes and edges [2024-10-13 10:35:08,631 INFO L904 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2024-10-13 10:35:08,631 INFO L904 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2024-10-13 10:35:08,631 INFO L904 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2024-10-13 10:35:08,696 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2024-10-13 10:35:08,697 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.yml [2024-10-13 10:35:08,697 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-10-13 10:35:08,697 INFO L158 Benchmark]: Toolchain (without parser) took 14935.94ms. Allocated memory was 159.4MB in the beginning and 297.8MB in the end (delta: 138.4MB). Free memory was 87.3MB in the beginning and 145.9MB in the end (delta: -58.6MB). Peak memory consumption was 81.2MB. Max. memory is 16.1GB. [2024-10-13 10:35:08,697 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 159.4MB. Free memory is still 110.6MB. There was no memory consumed. Max. memory is 16.1GB. [2024-10-13 10:35:08,698 INFO L158 Benchmark]: CACSL2BoogieTranslator took 378.60ms. Allocated memory is still 159.4MB. Free memory was 87.1MB in the beginning and 69.1MB in the end (delta: 18.0MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-10-13 10:35:08,698 INFO L158 Benchmark]: Boogie Procedure Inliner took 39.39ms. Allocated memory is still 159.4MB. Free memory was 69.1MB in the beginning and 67.2MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-10-13 10:35:08,698 INFO L158 Benchmark]: Boogie Preprocessor took 35.55ms. Allocated memory is still 159.4MB. Free memory was 67.2MB in the beginning and 65.0MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-10-13 10:35:08,698 INFO L158 Benchmark]: RCFGBuilder took 345.39ms. Allocated memory was 159.4MB in the beginning and 205.5MB in the end (delta: 46.1MB). Free memory was 65.0MB in the beginning and 165.2MB in the end (delta: -100.2MB). Peak memory consumption was 19.0MB. Max. memory is 16.1GB. [2024-10-13 10:35:08,698 INFO L158 Benchmark]: TraceAbstraction took 14057.66ms. Allocated memory was 205.5MB in the beginning and 297.8MB in the end (delta: 92.3MB). Free memory was 165.2MB in the beginning and 150.7MB in the end (delta: 14.5MB). Peak memory consumption was 108.4MB. Max. memory is 16.1GB. [2024-10-13 10:35:08,699 INFO L158 Benchmark]: Witness Printer took 73.91ms. Allocated memory is still 297.8MB. Free memory was 150.7MB in the beginning and 145.9MB in the end (delta: 4.8MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-10-13 10:35:08,699 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 159.4MB. Free memory is still 110.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 378.60ms. Allocated memory is still 159.4MB. Free memory was 87.1MB in the beginning and 69.1MB in the end (delta: 18.0MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 39.39ms. Allocated memory is still 159.4MB. Free memory was 69.1MB in the beginning and 67.2MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 35.55ms. Allocated memory is still 159.4MB. Free memory was 67.2MB in the beginning and 65.0MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 345.39ms. Allocated memory was 159.4MB in the beginning and 205.5MB in the end (delta: 46.1MB). Free memory was 65.0MB in the beginning and 165.2MB in the end (delta: -100.2MB). Peak memory consumption was 19.0MB. Max. memory is 16.1GB. * TraceAbstraction took 14057.66ms. Allocated memory was 205.5MB in the beginning and 297.8MB in the end (delta: 92.3MB). Free memory was 165.2MB in the beginning and 150.7MB in the end (delta: 14.5MB). Peak memory consumption was 108.4MB. Max. memory is 16.1GB. * Witness Printer took 73.91ms. Allocated memory is still 297.8MB. Free memory was 150.7MB in the beginning and 145.9MB in the end (delta: 4.8MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 559]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 24 locations, 9 error locations. Started 1 CEGAR loops. OverallTime: 14.0s, OverallIterations: 18, TraceHistogramMax: 4, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 4.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 272 SdHoareTripleChecker+Valid, 1.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 272 mSDsluCounter, 1000 SdHoareTripleChecker+Invalid, 1.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 791 mSDsCounter, 39 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1874 IncrementalHoareTripleChecker+Invalid, 1913 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 39 mSolverCounterUnsat, 209 mSDtfsCounter, 1874 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 343 GetRequests, 84 SyntacticMatches, 8 SemanticMatches, 251 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1685 ImplicationChecksByTransitivity, 6.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=50occurred in iteration=15, InterpolantAutomatonStates: 152, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 18 MinimizatonAttempts, 40 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 7.3s InterpolantComputationTime, 286 NumberOfCodeBlocks, 286 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 346 ConstructedInterpolants, 50 QuantifiedInterpolants, 5074 SizeOfPredicates, 50 NumberOfNonLiveVariables, 644 ConjunctsInSsa, 210 ConjunctsInUnsatCore, 28 InterpolantComputations, 13 PerfectInterpolantSequences, 16/124 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 9 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-10-13 10:35:08,731 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE