./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/valid-memsafety.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/cstrcpy-alloca-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 84cfde4a Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/cstrcpy-alloca-1.i -s /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash fa78fde783b634840a8dd117d9f71a3fa4064d7e1622444edf74e6b44f549a34 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-11 17:45:06,828 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-11 17:45:06,898 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-11 17:45:06,901 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-11 17:45:06,904 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-11 17:45:06,921 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-11 17:45:06,922 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-11 17:45:06,922 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-11 17:45:06,922 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-11 17:45:06,924 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-11 17:45:06,924 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-11 17:45:06,925 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-11 17:45:06,925 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-11 17:45:06,928 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-11 17:45:06,928 INFO L153 SettingsManager]: * Use SBE=true [2024-10-11 17:45:06,929 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-11 17:45:06,929 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-11 17:45:06,929 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-11 17:45:06,929 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-11 17:45:06,929 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-11 17:45:06,929 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-11 17:45:06,930 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-11 17:45:06,930 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-11 17:45:06,930 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-11 17:45:06,930 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-11 17:45:06,930 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-11 17:45:06,930 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-11 17:45:06,931 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-11 17:45:06,931 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-11 17:45:06,931 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-11 17:45:06,931 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-11 17:45:06,931 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-11 17:45:06,931 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-11 17:45:06,932 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 17:45:06,932 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-11 17:45:06,932 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-11 17:45:06,933 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-11 17:45:06,933 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-11 17:45:06,934 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-11 17:45:06,934 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-11 17:45:06,934 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-11 17:45:06,934 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-11 17:45:06,934 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fa78fde783b634840a8dd117d9f71a3fa4064d7e1622444edf74e6b44f549a34 [2024-10-11 17:45:07,131 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-11 17:45:07,162 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-11 17:45:07,165 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-11 17:45:07,166 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-11 17:45:07,166 INFO L274 PluginConnector]: CDTParser initialized [2024-10-11 17:45:07,167 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/cstrcpy-alloca-1.i [2024-10-11 17:45:08,618 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-11 17:45:08,827 INFO L384 CDTParser]: Found 1 translation units. [2024-10-11 17:45:08,827 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/cstrcpy-alloca-1.i [2024-10-11 17:45:08,840 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/2717187f7/554f4153f1e34146ac1dbf9309651796/FLAGd79eccdc3 [2024-10-11 17:45:08,854 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/2717187f7/554f4153f1e34146ac1dbf9309651796 [2024-10-11 17:45:08,857 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-11 17:45:08,858 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-11 17:45:08,859 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-11 17:45:08,859 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-11 17:45:08,867 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-11 17:45:08,868 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 05:45:08" (1/1) ... [2024-10-11 17:45:08,869 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32f9753b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:45:08, skipping insertion in model container [2024-10-11 17:45:08,869 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 05:45:08" (1/1) ... [2024-10-11 17:45:08,913 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-11 17:45:09,190 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 17:45:09,202 INFO L200 MainTranslator]: Completed pre-run [2024-10-11 17:45:09,241 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 17:45:09,277 INFO L204 MainTranslator]: Completed translation [2024-10-11 17:45:09,278 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:45:09 WrapperNode [2024-10-11 17:45:09,278 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-11 17:45:09,279 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-11 17:45:09,279 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-11 17:45:09,280 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-11 17:45:09,286 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:45:09" (1/1) ... [2024-10-11 17:45:09,296 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:45:09" (1/1) ... [2024-10-11 17:45:09,313 INFO L138 Inliner]: procedures = 117, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 71 [2024-10-11 17:45:09,313 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-11 17:45:09,314 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-11 17:45:09,314 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-11 17:45:09,314 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-11 17:45:09,339 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:45:09" (1/1) ... [2024-10-11 17:45:09,340 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:45:09" (1/1) ... [2024-10-11 17:45:09,348 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:45:09" (1/1) ... [2024-10-11 17:45:09,377 INFO L175 MemorySlicer]: Split 4 memory accesses to 2 slices as follows [3, 1]. 75 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0, 0]. The 3 writes are split as follows [2, 1]. [2024-10-11 17:45:09,380 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:45:09" (1/1) ... [2024-10-11 17:45:09,380 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:45:09" (1/1) ... [2024-10-11 17:45:09,384 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:45:09" (1/1) ... [2024-10-11 17:45:09,387 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:45:09" (1/1) ... [2024-10-11 17:45:09,388 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:45:09" (1/1) ... [2024-10-11 17:45:09,389 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:45:09" (1/1) ... [2024-10-11 17:45:09,391 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-11 17:45:09,392 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-11 17:45:09,392 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-11 17:45:09,392 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-11 17:45:09,393 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:45:09" (1/1) ... [2024-10-11 17:45:09,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 17:45:09,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:45:09,424 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-11 17:45:09,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-11 17:45:09,474 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-11 17:45:09,476 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-11 17:45:09,476 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-11 17:45:09,476 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-11 17:45:09,477 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-11 17:45:09,477 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-11 17:45:09,477 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-11 17:45:09,477 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-11 17:45:09,554 INFO L238 CfgBuilder]: Building ICFG [2024-10-11 17:45:09,555 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-11 17:45:09,740 INFO L? ?]: Removed 44 outVars from TransFormulas that were not future-live. [2024-10-11 17:45:09,741 INFO L287 CfgBuilder]: Performing block encoding [2024-10-11 17:45:09,782 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-11 17:45:09,782 INFO L314 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-11 17:45:09,782 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 05:45:09 BoogieIcfgContainer [2024-10-11 17:45:09,782 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-11 17:45:09,784 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-11 17:45:09,784 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-11 17:45:09,788 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-11 17:45:09,788 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 05:45:08" (1/3) ... [2024-10-11 17:45:09,789 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@890ec52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 05:45:09, skipping insertion in model container [2024-10-11 17:45:09,789 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 05:45:09" (2/3) ... [2024-10-11 17:45:09,790 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@890ec52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 05:45:09, skipping insertion in model container [2024-10-11 17:45:09,790 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 05:45:09" (3/3) ... [2024-10-11 17:45:09,791 INFO L112 eAbstractionObserver]: Analyzing ICFG cstrcpy-alloca-1.i [2024-10-11 17:45:09,807 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-11 17:45:09,807 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2024-10-11 17:45:09,859 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 17:45:09,867 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;@7725f023, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 17:45:09,867 INFO L334 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2024-10-11 17:45:09,872 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 14 states have (on average 2.142857142857143) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:45:09,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-10-11 17:45:09,880 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:45:09,880 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-10-11 17:45:09,881 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-10-11 17:45:09,887 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:45:09,888 INFO L85 PathProgramCache]: Analyzing trace with hash 92512218, now seen corresponding path program 1 times [2024-10-11 17:45:09,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:45:09,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608306522] [2024-10-11 17:45:09,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:45:09,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:45:09,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:45:10,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:45:10,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:45:10,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608306522] [2024-10-11 17:45:10,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608306522] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 17:45:10,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 17:45:10,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-11 17:45:10,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632669183] [2024-10-11 17:45:10,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 17:45:10,064 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 17:45:10,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:45:10,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 17:45:10,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 17:45:10,097 INFO L87 Difference]: Start difference. First operand has 24 states, 14 states have (on average 2.142857142857143) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:45:10,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:45:10,194 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2024-10-11 17:45:10,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 17:45:10,197 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2024-10-11 17:45:10,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:45:10,203 INFO L225 Difference]: With dead ends: 25 [2024-10-11 17:45:10,204 INFO L226 Difference]: Without dead ends: 24 [2024-10-11 17:45:10,205 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-11 17:45:10,208 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 2 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 17:45:10,209 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 52 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 17:45:10,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-10-11 17:45:10,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-10-11 17:45:10,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 15 states have (on average 1.8666666666666667) 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) [2024-10-11 17:45:10,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2024-10-11 17:45:10,240 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 5 [2024-10-11 17:45:10,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:45:10,241 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2024-10-11 17:45:10,241 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:45:10,241 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2024-10-11 17:45:10,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-10-11 17:45:10,242 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:45:10,242 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-10-11 17:45:10,242 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-11 17:45:10,242 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-10-11 17:45:10,243 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:45:10,243 INFO L85 PathProgramCache]: Analyzing trace with hash 92514140, now seen corresponding path program 1 times [2024-10-11 17:45:10,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:45:10,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26037160] [2024-10-11 17:45:10,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:45:10,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:45:10,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:45:10,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:45:10,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:45:10,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26037160] [2024-10-11 17:45:10,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26037160] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 17:45:10,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 17:45:10,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-11 17:45:10,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622838956] [2024-10-11 17:45:10,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 17:45:10,288 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 17:45:10,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:45:10,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 17:45:10,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 17:45:10,289 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 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) [2024-10-11 17:45:10,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:45:10,317 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2024-10-11 17:45:10,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 17:45:10,317 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 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 [2024-10-11 17:45:10,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:45:10,318 INFO L225 Difference]: With dead ends: 25 [2024-10-11 17:45:10,318 INFO L226 Difference]: Without dead ends: 24 [2024-10-11 17:45:10,318 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 17:45:10,319 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 2 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 32 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 [2024-10-11 17:45:10,319 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 32 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 17:45:10,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-10-11 17:45:10,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2024-10-11 17:45:10,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 14 states have (on average 1.8571428571428572) 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) [2024-10-11 17:45:10,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2024-10-11 17:45:10,322 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 5 [2024-10-11 17:45:10,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:45:10,322 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2024-10-11 17:45:10,323 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 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) [2024-10-11 17:45:10,323 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2024-10-11 17:45:10,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-10-11 17:45:10,323 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:45:10,323 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-11 17:45:10,323 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-11 17:45:10,323 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-10-11 17:45:10,324 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:45:10,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1427087765, now seen corresponding path program 1 times [2024-10-11 17:45:10,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:45:10,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134222265] [2024-10-11 17:45:10,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:45:10,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:45:10,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:45:10,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:45:10,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:45:10,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134222265] [2024-10-11 17:45:10,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134222265] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 17:45:10,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 17:45:10,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-11 17:45:10,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18188757] [2024-10-11 17:45:10,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 17:45:10,439 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 17:45:10,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:45:10,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 17:45:10,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-11 17:45:10,440 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:45:10,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:45:10,474 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2024-10-11 17:45:10,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 17:45:10,477 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-10-11 17:45:10,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:45:10,477 INFO L225 Difference]: With dead ends: 28 [2024-10-11 17:45:10,477 INFO L226 Difference]: Without dead ends: 28 [2024-10-11 17:45:10,477 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-11 17:45:10,478 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 3 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 17:45:10,479 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 49 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 17:45:10,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-10-11 17:45:10,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2024-10-11 17:45:10,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.75) internal successors, (28), 24 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) [2024-10-11 17:45:10,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2024-10-11 17:45:10,487 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 6 [2024-10-11 17:45:10,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:45:10,488 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2024-10-11 17:45:10,488 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:45:10,488 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2024-10-11 17:45:10,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-10-11 17:45:10,488 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:45:10,488 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-11 17:45:10,488 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-11 17:45:10,489 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-10-11 17:45:10,489 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:45:10,489 INFO L85 PathProgramCache]: Analyzing trace with hash -1427028183, now seen corresponding path program 1 times [2024-10-11 17:45:10,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:45:10,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334200159] [2024-10-11 17:45:10,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:45:10,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:45:10,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:45:10,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:45:10,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:45:10,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334200159] [2024-10-11 17:45:10,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334200159] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 17:45:10,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 17:45:10,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 17:45:10,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950494633] [2024-10-11 17:45:10,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 17:45:10,566 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 17:45:10,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:45:10,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 17:45:10,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 17:45:10,567 INFO L87 Difference]: Start difference. First operand 25 states and 28 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) [2024-10-11 17:45:10,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:45:10,584 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2024-10-11 17:45:10,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 17:45:10,585 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-10-11 17:45:10,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:45:10,585 INFO L225 Difference]: With dead ends: 23 [2024-10-11 17:45:10,585 INFO L226 Difference]: Without dead ends: 23 [2024-10-11 17:45:10,586 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 17:45:10,587 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 3 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 17:45:10,587 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 27 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 17:45:10,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2024-10-11 17:45:10,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2024-10-11 17:45:10,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 16 states have (on average 1.625) 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) [2024-10-11 17:45:10,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2024-10-11 17:45:10,589 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 6 [2024-10-11 17:45:10,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:45:10,590 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2024-10-11 17:45:10,590 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:45:10,590 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2024-10-11 17:45:10,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-10-11 17:45:10,590 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:45:10,590 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-11 17:45:10,590 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-11 17:45:10,591 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-10-11 17:45:10,591 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:45:10,591 INFO L85 PathProgramCache]: Analyzing trace with hash -1427028182, now seen corresponding path program 1 times [2024-10-11 17:45:10,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:45:10,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949566468] [2024-10-11 17:45:10,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:45:10,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:45:10,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:45:10,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:45:10,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:45:10,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949566468] [2024-10-11 17:45:10,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949566468] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 17:45:10,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 17:45:10,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-11 17:45:10,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864796164] [2024-10-11 17:45:10,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 17:45:10,658 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 17:45:10,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:45:10,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 17:45:10,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 17:45:10,659 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:45:10,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:45:10,682 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2024-10-11 17:45:10,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 17:45:10,682 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-10-11 17:45:10,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:45:10,684 INFO L225 Difference]: With dead ends: 28 [2024-10-11 17:45:10,684 INFO L226 Difference]: Without dead ends: 28 [2024-10-11 17:45:10,684 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 17:45:10,685 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 1 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 17:45:10,685 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 46 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 17:45:10,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-10-11 17:45:10,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2024-10-11 17:45:10,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 17 states have (on average 1.6470588235294117) 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) [2024-10-11 17:45:10,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2024-10-11 17:45:10,688 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 6 [2024-10-11 17:45:10,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:45:10,689 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2024-10-11 17:45:10,689 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:45:10,689 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2024-10-11 17:45:10,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-10-11 17:45:10,689 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:45:10,689 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-11 17:45:10,690 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-11 17:45:10,690 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-10-11 17:45:10,690 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:45:10,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1425181140, now seen corresponding path program 1 times [2024-10-11 17:45:10,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:45:10,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894590053] [2024-10-11 17:45:10,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:45:10,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:45:10,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:45:10,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:45:10,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:45:10,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894590053] [2024-10-11 17:45:10,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894590053] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 17:45:10,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 17:45:10,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 17:45:10,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172025950] [2024-10-11 17:45:10,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 17:45:10,863 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 17:45:10,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:45:10,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 17:45:10,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-11 17:45:10,864 INFO L87 Difference]: Start difference. First operand 24 states and 28 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) [2024-10-11 17:45:10,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:45:10,918 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2024-10-11 17:45:10,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 17:45:10,918 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 [2024-10-11 17:45:10,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:45:10,919 INFO L225 Difference]: With dead ends: 26 [2024-10-11 17:45:10,919 INFO L226 Difference]: Without dead ends: 26 [2024-10-11 17:45:10,919 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-10-11 17:45:10,920 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 9 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 17:45:10,921 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 28 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 17:45:10,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-10-11 17:45:10,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2024-10-11 17:45:10,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 19 states have (on average 1.631578947368421) internal successors, (31), 25 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) [2024-10-11 17:45:10,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2024-10-11 17:45:10,924 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 6 [2024-10-11 17:45:10,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:45:10,924 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2024-10-11 17:45:10,924 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) [2024-10-11 17:45:10,924 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2024-10-11 17:45:10,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-10-11 17:45:10,925 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:45:10,925 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:45:10,925 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-11 17:45:10,925 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-10-11 17:45:10,926 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:45:10,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1290049389, now seen corresponding path program 1 times [2024-10-11 17:45:10,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:45:10,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925885429] [2024-10-11 17:45:10,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:45:10,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:45:10,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:45:11,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:45:11,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:45:11,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925885429] [2024-10-11 17:45:11,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925885429] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 17:45:11,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 17:45:11,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 17:45:11,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258280315] [2024-10-11 17:45:11,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 17:45:11,039 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 17:45:11,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:45:11,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 17:45:11,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-11 17:45:11,040 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:45:11,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:45:11,058 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2024-10-11 17:45:11,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 17:45:11,058 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-10-11 17:45:11,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:45:11,058 INFO L225 Difference]: With dead ends: 30 [2024-10-11 17:45:11,059 INFO L226 Difference]: Without dead ends: 30 [2024-10-11 17:45:11,059 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 [2024-10-11 17:45:11,059 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 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 [2024-10-11 17:45:11,060 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 17:45:11,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-10-11 17:45:11,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2024-10-11 17:45:11,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 23 states have (on average 1.5217391304347827) 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) [2024-10-11 17:45:11,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2024-10-11 17:45:11,062 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 7 [2024-10-11 17:45:11,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:45:11,062 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2024-10-11 17:45:11,063 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:45:11,063 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2024-10-11 17:45:11,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-10-11 17:45:11,063 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:45:11,063 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:45:11,063 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-11 17:45:11,063 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-10-11 17:45:11,064 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:45:11,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1288202347, now seen corresponding path program 1 times [2024-10-11 17:45:11,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:45:11,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406079667] [2024-10-11 17:45:11,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:45:11,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:45:11,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:45:11,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:45:11,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:45:11,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406079667] [2024-10-11 17:45:11,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406079667] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 17:45:11,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 17:45:11,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 17:45:11,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117866593] [2024-10-11 17:45:11,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 17:45:11,165 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 17:45:11,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:45:11,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 17:45:11,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-10-11 17:45:11,166 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:45:11,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:45:11,185 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2024-10-11 17:45:11,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 17:45:11,185 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-10-11 17:45:11,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:45:11,186 INFO L225 Difference]: With dead ends: 29 [2024-10-11 17:45:11,186 INFO L226 Difference]: Without dead ends: 29 [2024-10-11 17:45:11,186 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 [2024-10-11 17:45:11,186 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 9 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 17:45:11,187 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 25 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 17:45:11,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-10-11 17:45:11,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 25. [2024-10-11 17:45:11,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 24 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:45:11,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2024-10-11 17:45:11,189 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 7 [2024-10-11 17:45:11,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:45:11,190 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2024-10-11 17:45:11,190 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:45:11,190 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2024-10-11 17:45:11,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-10-11 17:45:11,190 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:45:11,190 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-10-11 17:45:11,191 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-11 17:45:11,191 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-10-11 17:45:11,191 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:45:11,191 INFO L85 PathProgramCache]: Analyzing trace with hash 495533113, now seen corresponding path program 1 times [2024-10-11 17:45:11,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:45:11,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676329097] [2024-10-11 17:45:11,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:45:11,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:45:11,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:45:11,330 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:45:11,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:45:11,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676329097] [2024-10-11 17:45:11,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676329097] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:45:11,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164868964] [2024-10-11 17:45:11,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:45:11,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:45:11,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:45:11,334 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:45:11,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-11 17:45:11,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:45:11,410 INFO L255 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-11 17:45:11,415 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:45:11,478 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2024-10-11 17:45:11,486 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-11 17:45:11,591 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:45:11,591 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:45:11,776 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:45:11,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164868964] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:45:11,776 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:45:11,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2024-10-11 17:45:11,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956134513] [2024-10-11 17:45:11,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:45:11,781 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-11 17:45:11,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:45:11,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-11 17:45:11,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2024-10-11 17:45:11,782 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:45:11,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:45:11,992 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2024-10-11 17:45:11,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-11 17:45:11,992 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-10-11 17:45:11,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:45:11,993 INFO L225 Difference]: With dead ends: 25 [2024-10-11 17:45:11,993 INFO L226 Difference]: Without dead ends: 25 [2024-10-11 17:45:11,993 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2024-10-11 17:45:11,994 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 6 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 17:45:11,995 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 73 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 17:45:11,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-10-11 17:45:11,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2024-10-11 17:45:11,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 21 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) [2024-10-11 17:45:11,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2024-10-11 17:45:11,998 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 8 [2024-10-11 17:45:11,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:45:11,998 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2024-10-11 17:45:11,998 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:45:11,998 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2024-10-11 17:45:11,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-10-11 17:45:11,999 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:45:11,999 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:45:12,014 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-11 17:45:12,200 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:45:12,201 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-10-11 17:45:12,202 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:45:12,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1508116980, now seen corresponding path program 1 times [2024-10-11 17:45:12,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:45:12,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221203046] [2024-10-11 17:45:12,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:45:12,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:45:12,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:45:12,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:45:12,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:45:12,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221203046] [2024-10-11 17:45:12,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221203046] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 17:45:12,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 17:45:12,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 17:45:12,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608830629] [2024-10-11 17:45:12,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 17:45:12,241 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 17:45:12,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:45:12,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 17:45:12,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 17:45:12,242 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:45:12,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:45:12,267 INFO L93 Difference]: Finished difference Result 21 states and 25 transitions. [2024-10-11 17:45:12,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 17:45:12,268 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-10-11 17:45:12,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:45:12,268 INFO L225 Difference]: With dead ends: 21 [2024-10-11 17:45:12,268 INFO L226 Difference]: Without dead ends: 21 [2024-10-11 17:45:12,268 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-11 17:45:12,269 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 17:45:12,269 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 27 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 17:45:12,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-10-11 17:45:12,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2024-10-11 17:45:12,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 20 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) [2024-10-11 17:45:12,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2024-10-11 17:45:12,271 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 9 [2024-10-11 17:45:12,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:45:12,272 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2024-10-11 17:45:12,272 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:45:12,272 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2024-10-11 17:45:12,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-10-11 17:45:12,272 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:45:12,272 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:45:12,272 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-10-11 17:45:12,273 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-10-11 17:45:12,273 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:45:12,273 INFO L85 PathProgramCache]: Analyzing trace with hash 1508116981, now seen corresponding path program 1 times [2024-10-11 17:45:12,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:45:12,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606903061] [2024-10-11 17:45:12,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:45:12,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:45:12,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:45:12,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:45:12,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:45:12,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606903061] [2024-10-11 17:45:12,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606903061] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 17:45:12,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 17:45:12,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-11 17:45:12,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408383381] [2024-10-11 17:45:12,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 17:45:12,350 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-11 17:45:12,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:45:12,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-11 17:45:12,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-10-11 17:45:12,351 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:45:12,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:45:12,380 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2024-10-11 17:45:12,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 17:45:12,381 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-10-11 17:45:12,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:45:12,381 INFO L225 Difference]: With dead ends: 23 [2024-10-11 17:45:12,381 INFO L226 Difference]: Without dead ends: 23 [2024-10-11 17:45:12,381 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-10-11 17:45:12,382 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 4 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 17:45:12,382 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 37 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 17:45:12,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2024-10-11 17:45:12,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2024-10-11 17:45:12,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:45:12,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2024-10-11 17:45:12,383 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 9 [2024-10-11 17:45:12,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:45:12,383 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2024-10-11 17:45:12,384 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:45:12,384 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2024-10-11 17:45:12,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-10-11 17:45:12,384 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:45:12,384 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:45:12,384 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-10-11 17:45:12,385 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-10-11 17:45:12,385 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:45:12,385 INFO L85 PathProgramCache]: Analyzing trace with hash -493013856, now seen corresponding path program 1 times [2024-10-11 17:45:12,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:45:12,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559560643] [2024-10-11 17:45:12,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:45:12,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:45:12,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:45:12,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:45:12,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:45:12,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559560643] [2024-10-11 17:45:12,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559560643] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 17:45:12,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 17:45:12,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-11 17:45:12,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049986198] [2024-10-11 17:45:12,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 17:45:12,454 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 17:45:12,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:45:12,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 17:45:12,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-11 17:45:12,454 INFO L87 Difference]: Start difference. First operand 23 states and 27 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) [2024-10-11 17:45:12,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:45:12,486 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2024-10-11 17:45:12,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 17:45:12,487 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 [2024-10-11 17:45:12,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:45:12,487 INFO L225 Difference]: With dead ends: 22 [2024-10-11 17:45:12,487 INFO L226 Difference]: Without dead ends: 22 [2024-10-11 17:45:12,488 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-11 17:45:12,488 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 9 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 33 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 [2024-10-11 17:45:12,489 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 33 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 17:45:12,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-10-11 17:45:12,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2024-10-11 17:45:12,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 19 states have (on average 1.368421052631579) internal successors, (26), 21 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) [2024-10-11 17:45:12,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2024-10-11 17:45:12,491 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 10 [2024-10-11 17:45:12,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:45:12,491 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2024-10-11 17:45:12,493 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) [2024-10-11 17:45:12,493 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2024-10-11 17:45:12,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-10-11 17:45:12,494 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:45:12,494 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:45:12,494 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-10-11 17:45:12,494 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)] === [2024-10-11 17:45:12,495 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:45:12,495 INFO L85 PathProgramCache]: Analyzing trace with hash -493013855, now seen corresponding path program 1 times [2024-10-11 17:45:12,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:45:12,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820636901] [2024-10-11 17:45:12,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:45:12,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:45:12,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:45:12,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:45:12,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:45:12,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820636901] [2024-10-11 17:45:12,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820636901] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 17:45:12,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 17:45:12,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-11 17:45:12,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919238543] [2024-10-11 17:45:12,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 17:45:12,662 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-11 17:45:12,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:45:12,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-11 17:45:12,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-10-11 17:45:12,665 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:45:12,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:45:12,704 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2024-10-11 17:45:12,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 17:45:12,704 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-10-11 17:45:12,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:45:12,705 INFO L225 Difference]: With dead ends: 29 [2024-10-11 17:45:12,705 INFO L226 Difference]: Without dead ends: 29 [2024-10-11 17:45:12,706 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-10-11 17:45:12,707 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 1 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 50 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 [2024-10-11 17:45:12,707 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 50 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 17:45:12,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-10-11 17:45:12,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2024-10-11 17:45:12,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 28 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:45:12,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2024-10-11 17:45:12,709 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 10 [2024-10-11 17:45:12,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:45:12,710 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2024-10-11 17:45:12,710 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:45:12,711 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2024-10-11 17:45:12,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-10-11 17:45:12,711 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:45:12,711 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:45:12,711 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-10-11 17:45:12,712 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)] === [2024-10-11 17:45:12,712 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:45:12,713 INFO L85 PathProgramCache]: Analyzing trace with hash 187044515, now seen corresponding path program 1 times [2024-10-11 17:45:12,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:45:12,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322749796] [2024-10-11 17:45:12,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:45:12,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:45:12,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:45:12,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:45:12,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:45:12,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322749796] [2024-10-11 17:45:12,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322749796] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 17:45:12,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 17:45:12,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-11 17:45:12,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985052037] [2024-10-11 17:45:12,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 17:45:12,877 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-11 17:45:12,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:45:12,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-11 17:45:12,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-10-11 17:45:12,878 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:45:12,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:45:12,921 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2024-10-11 17:45:12,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-11 17:45:12,921 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-10-11 17:45:12,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:45:12,922 INFO L225 Difference]: With dead ends: 30 [2024-10-11 17:45:12,922 INFO L226 Difference]: Without dead ends: 30 [2024-10-11 17:45:12,922 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-10-11 17:45:12,922 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 4 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 17:45:12,923 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 37 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 17:45:12,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-10-11 17:45:12,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 23. [2024-10-11 17:45:12,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 20 states have (on average 1.35) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:45:12,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2024-10-11 17:45:12,926 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 10 [2024-10-11 17:45:12,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:45:12,926 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2024-10-11 17:45:12,927 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:45:12,927 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2024-10-11 17:45:12,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-10-11 17:45:12,927 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:45:12,927 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:45:12,927 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-10-11 17:45:12,927 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-10-11 17:45:12,928 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:45:12,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1412393616, now seen corresponding path program 1 times [2024-10-11 17:45:12,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:45:12,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240132493] [2024-10-11 17:45:12,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:45:12,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:45:12,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:45:13,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:45:13,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:45:13,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240132493] [2024-10-11 17:45:13,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240132493] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 17:45:13,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 17:45:13,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 17:45:13,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834360812] [2024-10-11 17:45:13,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 17:45:13,065 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 17:45:13,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:45:13,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 17:45:13,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 17:45:13,065 INFO L87 Difference]: Start difference. First operand 23 states and 27 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) [2024-10-11 17:45:13,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:45:13,084 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2024-10-11 17:45:13,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 17:45:13,084 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 [2024-10-11 17:45:13,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:45:13,085 INFO L225 Difference]: With dead ends: 22 [2024-10-11 17:45:13,085 INFO L226 Difference]: Without dead ends: 20 [2024-10-11 17:45:13,085 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 17:45:13,085 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 [2024-10-11 17:45:13,085 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] [2024-10-11 17:45:13,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2024-10-11 17:45:13,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2024-10-11 17:45:13,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:45:13,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2024-10-11 17:45:13,087 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 13 [2024-10-11 17:45:13,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:45:13,087 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2024-10-11 17:45:13,087 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) [2024-10-11 17:45:13,087 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2024-10-11 17:45:13,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-10-11 17:45:13,087 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:45:13,087 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:45:13,087 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-10-11 17:45:13,087 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-10-11 17:45:13,087 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:45:13,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1412394685, now seen corresponding path program 1 times [2024-10-11 17:45:13,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:45:13,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464042597] [2024-10-11 17:45:13,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:45:13,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:45:13,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:45:13,225 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:45:13,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:45:13,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464042597] [2024-10-11 17:45:13,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464042597] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 17:45:13,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 17:45:13,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-10-11 17:45:13,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770531419] [2024-10-11 17:45:13,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 17:45:13,226 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-11 17:45:13,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:45:13,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-11 17:45:13,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-10-11 17:45:13,227 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:45:13,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:45:13,263 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2024-10-11 17:45:13,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-11 17:45:13,263 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-10-11 17:45:13,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:45:13,263 INFO L225 Difference]: With dead ends: 28 [2024-10-11 17:45:13,263 INFO L226 Difference]: Without dead ends: 20 [2024-10-11 17:45:13,263 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-10-11 17:45:13,264 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 17:45:13,264 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 17:45:13,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2024-10-11 17:45:13,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2024-10-11 17:45:13,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:45:13,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2024-10-11 17:45:13,265 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 13 [2024-10-11 17:45:13,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:45:13,265 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2024-10-11 17:45:13,265 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:45:13,265 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2024-10-11 17:45:13,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-10-11 17:45:13,266 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:45:13,266 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:45:13,266 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-10-11 17:45:13,266 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)] === [2024-10-11 17:45:13,266 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:45:13,270 INFO L85 PathProgramCache]: Analyzing trace with hash 2113459263, now seen corresponding path program 1 times [2024-10-11 17:45:13,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:45:13,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636098408] [2024-10-11 17:45:13,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:45:13,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:45:13,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:45:13,391 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:45:13,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:45:13,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636098408] [2024-10-11 17:45:13,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636098408] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 17:45:13,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 17:45:13,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-10-11 17:45:13,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699389708] [2024-10-11 17:45:13,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 17:45:13,392 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-11 17:45:13,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:45:13,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-11 17:45:13,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-10-11 17:45:13,396 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:45:13,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:45:13,429 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2024-10-11 17:45:13,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-11 17:45:13,430 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-10-11 17:45:13,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:45:13,430 INFO L225 Difference]: With dead ends: 26 [2024-10-11 17:45:13,430 INFO L226 Difference]: Without dead ends: 17 [2024-10-11 17:45:13,431 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-10-11 17:45:13,431 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 17:45:13,431 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 17:45:13,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2024-10-11 17:45:13,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2024-10-11 17:45:13,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:45:13,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2024-10-11 17:45:13,432 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 13 [2024-10-11 17:45:13,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:45:13,432 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2024-10-11 17:45:13,433 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:45:13,433 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2024-10-11 17:45:13,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-10-11 17:45:13,433 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:45:13,433 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:45:13,433 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-10-11 17:45:13,433 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-10-11 17:45:13,434 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:45:13,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1923342595, now seen corresponding path program 1 times [2024-10-11 17:45:13,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:45:13,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515897166] [2024-10-11 17:45:13,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:45:13,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:45:13,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:45:13,538 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:45:13,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:45:13,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515897166] [2024-10-11 17:45:13,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515897166] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 17:45:13,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 17:45:13,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-10-11 17:45:13,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18056856] [2024-10-11 17:45:13,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 17:45:13,539 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-11 17:45:13,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:45:13,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-11 17:45:13,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-10-11 17:45:13,540 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:45:13,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:45:13,574 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2024-10-11 17:45:13,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-11 17:45:13,575 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-10-11 17:45:13,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:45:13,575 INFO L225 Difference]: With dead ends: 25 [2024-10-11 17:45:13,575 INFO L226 Difference]: Without dead ends: 19 [2024-10-11 17:45:13,575 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-10-11 17:45:13,576 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 1 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 17:45:13,576 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 34 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 17:45:13,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2024-10-11 17:45:13,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2024-10-11 17:45:13,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:45:13,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2024-10-11 17:45:13,577 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2024-10-11 17:45:13,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:45:13,577 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2024-10-11 17:45:13,577 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:45:13,578 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2024-10-11 17:45:13,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-10-11 17:45:13,578 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:45:13,578 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:45:13,578 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-10-11 17:45:13,578 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-10-11 17:45:13,578 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:45:13,579 INFO L85 PathProgramCache]: Analyzing trace with hash -643506096, now seen corresponding path program 1 times [2024-10-11 17:45:13,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:45:13,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800422708] [2024-10-11 17:45:13,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:45:13,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:45:13,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:45:13,746 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:45:13,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:45:13,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800422708] [2024-10-11 17:45:13,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800422708] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:45:13,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902336406] [2024-10-11 17:45:13,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:45:13,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:45:13,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:45:13,752 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:45:13,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-11 17:45:13,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:45:13,814 INFO L255 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-11 17:45:13,815 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:45:13,880 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:45:13,881 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:45:13,968 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-10-11 17:45:13,991 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:45:13,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902336406] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:45:13,992 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:45:13,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 16 [2024-10-11 17:45:13,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999514265] [2024-10-11 17:45:13,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:45:13,992 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-11 17:45:13,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:45:13,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-11 17:45:13,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2024-10-11 17:45:13,993 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 17 states, 16 states have (on average 1.875) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:45:14,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:45:14,075 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2024-10-11 17:45:14,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-11 17:45:14,075 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.875) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2024-10-11 17:45:14,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:45:14,075 INFO L225 Difference]: With dead ends: 22 [2024-10-11 17:45:14,076 INFO L226 Difference]: Without dead ends: 22 [2024-10-11 17:45:14,076 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2024-10-11 17:45:14,076 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 3 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 17:45:14,076 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 34 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 17:45:14,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-10-11 17:45:14,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2024-10-11 17:45:14,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:45:14,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2024-10-11 17:45:14,077 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 15 [2024-10-11 17:45:14,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:45:14,077 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2024-10-11 17:45:14,078 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.875) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:45:14,078 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2024-10-11 17:45:14,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-10-11 17:45:14,078 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:45:14,078 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:45:14,094 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-11 17:45:14,278 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,3 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:45:14,279 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-10-11 17:45:14,279 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:45:14,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1526147494, now seen corresponding path program 1 times [2024-10-11 17:45:14,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:45:14,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970076312] [2024-10-11 17:45:14,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:45:14,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:45:14,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:45:14,550 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:45:14,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:45:14,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970076312] [2024-10-11 17:45:14,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970076312] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:45:14,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432383221] [2024-10-11 17:45:14,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:45:14,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:45:14,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:45:14,553 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:45:14,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-11 17:45:14,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:45:14,607 INFO L255 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-10-11 17:45:14,608 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:45:14,641 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-10-11 17:45:14,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-11 17:45:14,646 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-10-11 17:45:14,769 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:45:14,770 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:45:14,936 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-11 17:45:14,964 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:45:14,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432383221] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:45:14,964 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:45:14,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 22 [2024-10-11 17:45:14,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664388534] [2024-10-11 17:45:14,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:45:14,965 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-11 17:45:14,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:45:14,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-11 17:45:14,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2024-10-11 17:45:14,965 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 24 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:45:15,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:45:15,199 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2024-10-11 17:45:15,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-11 17:45:15,199 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2024-10-11 17:45:15,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:45:15,200 INFO L225 Difference]: With dead ends: 23 [2024-10-11 17:45:15,200 INFO L226 Difference]: Without dead ends: 23 [2024-10-11 17:45:15,200 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=111, Invalid=759, Unknown=0, NotChecked=0, Total=870 [2024-10-11 17:45:15,200 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 8 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 17:45:15,201 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 46 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 17:45:15,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2024-10-11 17:45:15,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2024-10-11 17:45:15,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:45:15,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2024-10-11 17:45:15,202 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 16 [2024-10-11 17:45:15,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:45:15,202 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2024-10-11 17:45:15,202 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:45:15,202 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2024-10-11 17:45:15,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-10-11 17:45:15,202 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:45:15,203 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:45:15,218 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-11 17:45:15,406 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,4 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:45:15,407 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-10-11 17:45:15,407 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:45:15,407 INFO L85 PathProgramCache]: Analyzing trace with hash -1063805032, now seen corresponding path program 2 times [2024-10-11 17:45:15,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:45:15,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400695391] [2024-10-11 17:45:15,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:45:15,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:45:15,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:45:15,716 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:45:15,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:45:15,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400695391] [2024-10-11 17:45:15,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400695391] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:45:15,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382995864] [2024-10-11 17:45:15,717 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 17:45:15,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:45:15,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:45:15,720 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:45:15,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-11 17:45:15,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 17:45:15,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 17:45:15,790 INFO L255 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-10-11 17:45:15,792 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:45:15,838 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-10-11 17:45:15,861 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:45:15,861 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:45:15,874 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-10-11 17:45:15,876 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-10-11 17:45:15,911 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:45:15,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382995864] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:45:15,912 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:45:15,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 18 [2024-10-11 17:45:15,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708002077] [2024-10-11 17:45:15,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:45:15,912 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-11 17:45:15,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:45:15,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-11 17:45:15,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2024-10-11 17:45:15,913 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:45:16,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:45:16,006 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2024-10-11 17:45:16,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-11 17:45:16,007 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2024-10-11 17:45:16,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:45:16,007 INFO L225 Difference]: With dead ends: 35 [2024-10-11 17:45:16,007 INFO L226 Difference]: Without dead ends: 25 [2024-10-11 17:45:16,007 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2024-10-11 17:45:16,008 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 2 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 17:45:16,008 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 71 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 17:45:16,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-10-11 17:45:16,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2024-10-11 17:45:16,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 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) [2024-10-11 17:45:16,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2024-10-11 17:45:16,009 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 19 [2024-10-11 17:45:16,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:45:16,009 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2024-10-11 17:45:16,009 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:45:16,009 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2024-10-11 17:45:16,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-10-11 17:45:16,010 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:45:16,010 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:45:16,025 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-11 17:45:16,214 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-10-11 17:45:16,215 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-10-11 17:45:16,215 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:45:16,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1882248875, now seen corresponding path program 3 times [2024-10-11 17:45:16,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:45:16,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870866716] [2024-10-11 17:45:16,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:45:16,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:45:16,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:45:16,434 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:45:16,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:45:16,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870866716] [2024-10-11 17:45:16,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870866716] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:45:16,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364822702] [2024-10-11 17:45:16,435 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 17:45:16,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:45:16,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:45:16,437 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:45:16,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-11 17:45:16,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-11 17:45:16,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 17:45:16,516 INFO L255 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-10-11 17:45:16,518 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:45:16,607 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:45:16,608 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:45:16,691 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2024-10-11 17:45:16,754 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:45:16,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364822702] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:45:16,755 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:45:16,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2024-10-11 17:45:16,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044193014] [2024-10-11 17:45:16,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:45:16,755 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-11 17:45:16,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:45:16,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-11 17:45:16,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2024-10-11 17:45:16,756 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 21 states, 20 states have (on average 2.45) internal successors, (49), 21 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) [2024-10-11 17:45:16,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:45:16,888 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2024-10-11 17:45:16,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-11 17:45:16,889 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.45) internal successors, (49), 21 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 21 [2024-10-11 17:45:16,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:45:16,889 INFO L225 Difference]: With dead ends: 27 [2024-10-11 17:45:16,889 INFO L226 Difference]: Without dead ends: 27 [2024-10-11 17:45:16,890 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2024-10-11 17:45:16,890 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 2 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 17:45:16,890 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 56 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 17:45:16,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-10-11 17:45:16,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-10-11 17:45:16,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 25 states have (on average 1.12) internal successors, (28), 26 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:45:16,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2024-10-11 17:45:16,891 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 21 [2024-10-11 17:45:16,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:45:16,891 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2024-10-11 17:45:16,891 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.45) internal successors, (49), 21 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) [2024-10-11 17:45:16,892 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2024-10-11 17:45:16,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-10-11 17:45:16,892 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:45:16,892 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:45:16,906 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-10-11 17:45:17,096 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-10-11 17:45:17,097 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-10-11 17:45:17,097 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:45:17,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1779827029, now seen corresponding path program 2 times [2024-10-11 17:45:17,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:45:17,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606576481] [2024-10-11 17:45:17,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:45:17,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:45:17,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:45:17,361 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:45:17,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:45:17,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606576481] [2024-10-11 17:45:17,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606576481] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:45:17,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043402618] [2024-10-11 17:45:17,362 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 17:45:17,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:45:17,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:45:17,363 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:45:17,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-11 17:45:17,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 17:45:17,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 17:45:17,425 INFO L255 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 67 conjuncts are in the unsatisfiable core [2024-10-11 17:45:17,427 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:45:17,459 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-10-11 17:45:17,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-11 17:45:17,462 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-10-11 17:45:17,870 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:45:17,870 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:45:18,191 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-11 17:45:18,225 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:45:18,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043402618] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:45:18,225 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:45:18,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 34 [2024-10-11 17:45:18,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053542652] [2024-10-11 17:45:18,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:45:18,226 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-10-11 17:45:18,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:45:18,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-10-11 17:45:18,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1104, Unknown=0, NotChecked=0, Total=1260 [2024-10-11 17:45:18,227 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 36 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 35 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:45:18,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:45:18,552 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2024-10-11 17:45:18,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-11 17:45:18,552 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 35 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-10-11 17:45:18,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:45:18,552 INFO L225 Difference]: With dead ends: 31 [2024-10-11 17:45:18,552 INFO L226 Difference]: Without dead ends: 31 [2024-10-11 17:45:18,553 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=197, Invalid=1363, Unknown=0, NotChecked=0, Total=1560 [2024-10-11 17:45:18,553 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 8 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-11 17:45:18,554 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 58 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-11 17:45:18,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-10-11 17:45:18,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2024-10-11 17:45:18,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 27 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:45:18,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2024-10-11 17:45:18,555 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 22 [2024-10-11 17:45:18,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:45:18,555 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2024-10-11 17:45:18,555 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 35 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:45:18,555 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2024-10-11 17:45:18,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-10-11 17:45:18,556 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:45:18,556 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:45:18,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-10-11 17:45:18,760 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-10-11 17:45:18,761 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-10-11 17:45:18,762 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:45:18,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1455755149, now seen corresponding path program 4 times [2024-10-11 17:45:18,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:45:18,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961415161] [2024-10-11 17:45:18,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:45:18,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:45:18,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:45:18,979 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:45:18,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:45:18,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961415161] [2024-10-11 17:45:18,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961415161] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:45:18,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292610948] [2024-10-11 17:45:18,979 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-11 17:45:18,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:45:18,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:45:18,983 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:45:18,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-11 17:45:19,054 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-11 17:45:19,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 17:45:19,056 INFO L255 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-10-11 17:45:19,058 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:45:19,079 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-10-11 17:45:19,612 INFO L349 Elim1Store]: treesize reduction 8, result has 75.8 percent of original size [2024-10-11 17:45:19,613 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 [2024-10-11 17:45:19,712 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 17:45:19,712 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:45:20,165 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 [2024-10-11 17:45:20,176 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 [2024-10-11 17:45:20,186 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-10-11 17:45:20,206 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 17:45:20,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292610948] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:45:20,206 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:45:20,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 36 [2024-10-11 17:45:20,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983829284] [2024-10-11 17:45:20,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:45:20,207 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-10-11 17:45:20,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:45:20,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-10-11 17:45:20,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1112, Unknown=0, NotChecked=0, Total=1260 [2024-10-11 17:45:20,208 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand has 36 states, 36 states have (on average 1.6944444444444444) internal successors, (61), 36 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:45:21,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:45:21,033 INFO L93 Difference]: Finished difference Result 44 states and 45 transitions. [2024-10-11 17:45:21,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-10-11 17:45:21,033 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.6944444444444444) internal successors, (61), 36 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2024-10-11 17:45:21,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:45:21,034 INFO L225 Difference]: With dead ends: 44 [2024-10-11 17:45:21,034 INFO L226 Difference]: Without dead ends: 30 [2024-10-11 17:45:21,035 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=312, Invalid=2238, Unknown=0, NotChecked=0, Total=2550 [2024-10-11 17:45:21,035 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 10 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-11 17:45:21,035 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 48 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-11 17:45:21,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-10-11 17:45:21,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2024-10-11 17:45:21,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:45:21,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2024-10-11 17:45:21,037 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 25 [2024-10-11 17:45:21,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:45:21,037 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2024-10-11 17:45:21,037 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.6944444444444444) internal successors, (61), 36 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:45:21,037 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2024-10-11 17:45:21,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-10-11 17:45:21,038 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:45:21,038 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:45:21,054 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-11 17:45:21,242 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,8 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:45:21,243 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-10-11 17:45:21,243 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:45:21,244 INFO L85 PathProgramCache]: Analyzing trace with hash -691774608, now seen corresponding path program 3 times [2024-10-11 17:45:21,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:45:21,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365714180] [2024-10-11 17:45:21,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:45:21,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:45:21,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:45:21,603 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:45:21,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:45:21,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365714180] [2024-10-11 17:45:21,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365714180] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:45:21,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899590119] [2024-10-11 17:45:21,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 17:45:21,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:45:21,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:45:21,607 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:45:21,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-11 17:45:21,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-10-11 17:45:21,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 17:45:21,702 INFO L255 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 79 conjuncts are in the unsatisfiable core [2024-10-11 17:45:21,704 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:45:21,753 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-10-11 17:45:21,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-11 17:45:21,757 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-10-11 17:45:22,268 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:45:22,269 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:45:22,639 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-11 17:45:22,674 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:45:22,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899590119] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:45:22,675 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:45:22,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 39 [2024-10-11 17:45:22,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905661654] [2024-10-11 17:45:22,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:45:22,675 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-10-11 17:45:22,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:45:22,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-10-11 17:45:22,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1457, Unknown=0, NotChecked=0, Total=1640 [2024-10-11 17:45:22,677 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 41 states, 40 states have (on average 2.1) internal successors, (84), 40 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:45:23,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:45:23,057 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2024-10-11 17:45:23,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-10-11 17:45:23,058 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 2.1) internal successors, (84), 40 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2024-10-11 17:45:23,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:45:23,058 INFO L225 Difference]: With dead ends: 36 [2024-10-11 17:45:23,058 INFO L226 Difference]: Without dead ends: 36 [2024-10-11 17:45:23,059 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 592 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=243, Invalid=1919, Unknown=0, NotChecked=0, Total=2162 [2024-10-11 17:45:23,059 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 7 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-11 17:45:23,060 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 73 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-11 17:45:23,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-10-11 17:45:23,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2024-10-11 17:45:23,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.0625) internal successors, (34), 32 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:45:23,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2024-10-11 17:45:23,061 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 28 [2024-10-11 17:45:23,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:45:23,061 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2024-10-11 17:45:23,061 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 2.1) internal successors, (84), 40 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:45:23,061 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2024-10-11 17:45:23,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-10-11 17:45:23,062 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:45:23,062 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:45:23,079 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-11 17:45:23,265 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-10-11 17:45:23,265 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-10-11 17:45:23,266 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:45:23,266 INFO L85 PathProgramCache]: Analyzing trace with hash -582512600, now seen corresponding path program 4 times [2024-10-11 17:45:23,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:45:23,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177262405] [2024-10-11 17:45:23,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:45:23,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:45:23,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:45:23,638 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 25 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:45:23,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:45:23,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177262405] [2024-10-11 17:45:23,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177262405] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:45:23,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157338311] [2024-10-11 17:45:23,639 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-11 17:45:23,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:45:23,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:45:23,640 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:45:23,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-11 17:45:23,726 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-11 17:45:23,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 17:45:23,728 INFO L255 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-10-11 17:45:23,729 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:45:23,814 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-10-11 17:45:23,919 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 9 treesize of output 3 [2024-10-11 17:45:23,938 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 12 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:45:23,938 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:45:23,982 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-10-11 17:45:23,984 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-10-11 17:45:24,045 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 12 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:45:24,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157338311] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:45:24,045 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:45:24,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 30 [2024-10-11 17:45:24,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40647390] [2024-10-11 17:45:24,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:45:24,046 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-10-11 17:45:24,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:45:24,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-10-11 17:45:24,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=794, Unknown=0, NotChecked=0, Total=870 [2024-10-11 17:45:24,047 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:45:24,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:45:24,539 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2024-10-11 17:45:24,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-11 17:45:24,540 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2024-10-11 17:45:24,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:45:24,540 INFO L225 Difference]: With dead ends: 54 [2024-10-11 17:45:24,540 INFO L226 Difference]: Without dead ends: 36 [2024-10-11 17:45:24,541 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=170, Invalid=1722, Unknown=0, NotChecked=0, Total=1892 [2024-10-11 17:45:24,541 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 3 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-11 17:45:24,542 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 120 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-11 17:45:24,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-10-11 17:45:24,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2024-10-11 17:45:24,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 34 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:45:24,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2024-10-11 17:45:24,543 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 32 [2024-10-11 17:45:24,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:45:24,543 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2024-10-11 17:45:24,543 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:45:24,543 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2024-10-11 17:45:24,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-10-11 17:45:24,544 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:45:24,544 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:45:24,559 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-10-11 17:45:24,748 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,10 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:45:24,749 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-10-11 17:45:24,749 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:45:24,749 INFO L85 PathProgramCache]: Analyzing trace with hash 2014687221, now seen corresponding path program 5 times [2024-10-11 17:45:24,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:45:24,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199864000] [2024-10-11 17:45:24,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:45:24,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:45:24,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:45:25,214 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 4 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:45:25,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:45:25,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199864000] [2024-10-11 17:45:25,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199864000] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:45:25,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90190465] [2024-10-11 17:45:25,215 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-11 17:45:25,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:45:25,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:45:25,216 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:45:25,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-11 17:45:25,317 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-10-11 17:45:25,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 17:45:25,319 INFO L255 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 86 conjuncts are in the unsatisfiable core [2024-10-11 17:45:25,321 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:45:25,375 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-10-11 17:45:25,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-11 17:45:25,380 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-10-11 17:45:26,361 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 9 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:45:26,361 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:45:26,888 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-11 17:45:26,924 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 16 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:45:26,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90190465] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:45:26,925 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:45:26,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 41 [2024-10-11 17:45:26,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342142572] [2024-10-11 17:45:26,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:45:26,925 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-10-11 17:45:26,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:45:26,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-10-11 17:45:26,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1607, Unknown=0, NotChecked=0, Total=1806 [2024-10-11 17:45:26,927 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand has 43 states, 42 states have (on average 2.4285714285714284) internal successors, (102), 42 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:45:27,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:45:27,350 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2024-10-11 17:45:27,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-10-11 17:45:27,351 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 2.4285714285714284) internal successors, (102), 42 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2024-10-11 17:45:27,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:45:27,352 INFO L225 Difference]: With dead ends: 39 [2024-10-11 17:45:27,353 INFO L226 Difference]: Without dead ends: 39 [2024-10-11 17:45:27,353 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=249, Invalid=2007, Unknown=0, NotChecked=0, Total=2256 [2024-10-11 17:45:27,358 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 2 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-11 17:45:27,358 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 79 Invalid, 480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 480 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-11 17:45:27,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-10-11 17:45:27,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2024-10-11 17:45:27,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 38 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:45:27,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2024-10-11 17:45:27,363 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 34 [2024-10-11 17:45:27,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:45:27,363 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2024-10-11 17:45:27,363 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 2.4285714285714284) internal successors, (102), 42 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:45:27,363 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2024-10-11 17:45:27,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-10-11 17:45:27,363 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:45:27,363 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:45:27,376 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-10-11 17:45:27,564 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-10-11 17:45:27,564 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-10-11 17:45:27,564 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:45:27,564 INFO L85 PathProgramCache]: Analyzing trace with hash 354490925, now seen corresponding path program 6 times [2024-10-11 17:45:27,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:45:27,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992014637] [2024-10-11 17:45:27,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:45:27,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:45:27,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:45:28,029 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 41 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:45:28,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:45:28,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992014637] [2024-10-11 17:45:28,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992014637] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:45:28,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670874382] [2024-10-11 17:45:28,030 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-11 17:45:28,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:45:28,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:45:28,031 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:45:28,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-11 17:45:28,173 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-10-11 17:45:28,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 17:45:28,176 INFO L255 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 86 conjuncts are in the unsatisfiable core [2024-10-11 17:45:28,178 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:45:28,365 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-11 17:45:28,637 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 15 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:45:28,637 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:45:28,801 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-10-11 17:45:28,803 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-10-11 17:45:28,978 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 15 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:45:28,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670874382] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:45:28,978 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:45:28,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 44 [2024-10-11 17:45:28,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740661115] [2024-10-11 17:45:28,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:45:28,979 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-10-11 17:45:28,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:45:28,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-10-11 17:45:28,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1771, Unknown=0, NotChecked=0, Total=1892 [2024-10-11 17:45:28,980 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 44 states, 44 states have (on average 2.3181818181818183) internal successors, (102), 44 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:45:29,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:45:29,794 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2024-10-11 17:45:29,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-11 17:45:29,795 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.3181818181818183) internal successors, (102), 44 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2024-10-11 17:45:29,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:45:29,795 INFO L225 Difference]: With dead ends: 64 [2024-10-11 17:45:29,795 INFO L226 Difference]: Without dead ends: 42 [2024-10-11 17:45:29,796 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=263, Invalid=3519, Unknown=0, NotChecked=0, Total=3782 [2024-10-11 17:45:29,797 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 3 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 931 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 931 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-11 17:45:29,797 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 230 Invalid, 941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 931 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-11 17:45:29,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-10-11 17:45:29,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2024-10-11 17:45:29,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.05) internal successors, (42), 40 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) [2024-10-11 17:45:29,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2024-10-11 17:45:29,798 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 38 [2024-10-11 17:45:29,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:45:29,798 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2024-10-11 17:45:29,798 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.3181818181818183) internal successors, (102), 44 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:45:29,798 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2024-10-11 17:45:29,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-10-11 17:45:29,799 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:45:29,799 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:45:29,814 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-10-11 17:45:29,999 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-10-11 17:45:30,000 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-10-11 17:45:30,000 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:45:30,000 INFO L85 PathProgramCache]: Analyzing trace with hash 452553786, now seen corresponding path program 7 times [2024-10-11 17:45:30,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:45:30,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135053501] [2024-10-11 17:45:30,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:45:30,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:45:30,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:45:30,549 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 9 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:45:30,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:45:30,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135053501] [2024-10-11 17:45:30,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135053501] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:45:30,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953260113] [2024-10-11 17:45:30,550 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-11 17:45:30,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:45:30,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:45:30,552 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:45:30,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-11 17:45:30,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:45:30,646 INFO L255 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 102 conjuncts are in the unsatisfiable core [2024-10-11 17:45:30,648 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:45:30,683 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-10-11 17:45:30,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-11 17:45:30,688 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-10-11 17:45:31,839 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 16 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:45:31,839 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:45:32,497 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-11 17:45:32,554 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 25 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:45:32,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953260113] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:45:32,554 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:45:32,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 49 [2024-10-11 17:45:32,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322519781] [2024-10-11 17:45:32,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:45:32,555 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-10-11 17:45:32,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:45:32,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-10-11 17:45:32,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=2277, Unknown=0, NotChecked=0, Total=2550 [2024-10-11 17:45:32,556 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand has 51 states, 50 states have (on average 2.4) internal successors, (120), 50 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:45:33,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:45:33,292 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2024-10-11 17:45:33,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-11 17:45:33,292 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 2.4) internal successors, (120), 50 states have internal predecessors, (120), 0 states have call successors, (0), 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 40 [2024-10-11 17:45:33,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:45:33,293 INFO L225 Difference]: With dead ends: 45 [2024-10-11 17:45:33,293 INFO L226 Difference]: Without dead ends: 45 [2024-10-11 17:45:33,295 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 863 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=339, Invalid=2853, Unknown=0, NotChecked=0, Total=3192 [2024-10-11 17:45:33,298 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 2 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 679 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-11 17:45:33,299 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 108 Invalid, 679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 679 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-11 17:45:33,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-10-11 17:45:33,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2024-10-11 17:45:33,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 44 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:45:33,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2024-10-11 17:45:33,300 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 40 [2024-10-11 17:45:33,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:45:33,300 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2024-10-11 17:45:33,301 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 2.4) internal successors, (120), 50 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:45:33,301 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2024-10-11 17:45:33,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-10-11 17:45:33,301 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:45:33,301 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:45:33,316 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-10-11 17:45:33,501 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-10-11 17:45:33,502 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-10-11 17:45:33,502 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:45:33,502 INFO L85 PathProgramCache]: Analyzing trace with hash -342676494, now seen corresponding path program 8 times [2024-10-11 17:45:33,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:45:33,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644093670] [2024-10-11 17:45:33,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:45:33,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:45:33,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:45:34,163 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 61 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:45:34,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:45:34,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644093670] [2024-10-11 17:45:34,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644093670] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:45:34,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186235669] [2024-10-11 17:45:34,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 17:45:34,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:45:34,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:45:34,165 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:45:34,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-11 17:45:34,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 17:45:34,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 17:45:34,274 INFO L255 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-10-11 17:45:34,275 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:45:34,296 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2024-10-11 17:45:34,300 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-11 17:45:35,031 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 67 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:45:35,031 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:45:35,441 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 66 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:45:35,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186235669] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:45:35,442 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:45:35,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 46 [2024-10-11 17:45:35,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025284748] [2024-10-11 17:45:35,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:45:35,442 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-10-11 17:45:35,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:45:35,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-10-11 17:45:35,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=1806, Unknown=0, NotChecked=0, Total=2070 [2024-10-11 17:45:35,443 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 46 states, 46 states have (on average 2.217391304347826) internal successors, (102), 46 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:45:36,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:45:36,153 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2024-10-11 17:45:36,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-10-11 17:45:36,153 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.217391304347826) internal successors, (102), 46 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2024-10-11 17:45:36,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:45:36,154 INFO L225 Difference]: With dead ends: 76 [2024-10-11 17:45:36,154 INFO L226 Difference]: Without dead ends: 48 [2024-10-11 17:45:36,155 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 54 SyntacticMatches, 7 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1013 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=521, Invalid=3261, Unknown=0, NotChecked=0, Total=3782 [2024-10-11 17:45:36,155 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-11 17:45:36,155 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 112 Invalid, 449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-11 17:45:36,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-10-11 17:45:36,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2024-10-11 17:45:36,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 46 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:45:36,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2024-10-11 17:45:36,157 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 44 [2024-10-11 17:45:36,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:45:36,157 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2024-10-11 17:45:36,157 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.217391304347826) internal successors, (102), 46 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:45:36,158 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2024-10-11 17:45:36,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-10-11 17:45:36,158 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:45:36,158 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:45:36,171 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-10-11 17:45:36,362 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,14 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:45:36,363 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-10-11 17:45:36,363 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:45:36,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1642659777, now seen corresponding path program 9 times [2024-10-11 17:45:36,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:45:36,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036958478] [2024-10-11 17:45:36,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:45:36,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:45:36,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:45:36,997 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 16 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:45:36,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:45:36,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036958478] [2024-10-11 17:45:36,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036958478] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:45:36,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993357539] [2024-10-11 17:45:36,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 17:45:36,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:45:36,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:45:36,999 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:45:37,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-11 17:45:37,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-10-11 17:45:37,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 17:45:37,203 INFO L255 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 96 conjuncts are in the unsatisfiable core [2024-10-11 17:45:37,205 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:45:37,235 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-10-11 17:45:37,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-11 17:45:37,239 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-10-11 17:45:37,850 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 25 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:45:37,850 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:45:38,504 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-11 17:45:38,551 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 36 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:45:38,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993357539] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:45:38,552 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:45:38,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 53 [2024-10-11 17:45:38,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970582292] [2024-10-11 17:45:38,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:45:38,554 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2024-10-11 17:45:38,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:45:38,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2024-10-11 17:45:38,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=2724, Unknown=0, NotChecked=0, Total=2970 [2024-10-11 17:45:38,556 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand has 55 states, 54 states have (on average 2.5555555555555554) internal successors, (138), 54 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:45:39,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:45:39,505 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2024-10-11 17:45:39,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-10-11 17:45:39,505 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 54 states have (on average 2.5555555555555554) internal successors, (138), 54 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2024-10-11 17:45:39,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:45:39,506 INFO L225 Difference]: With dead ends: 51 [2024-10-11 17:45:39,506 INFO L226 Difference]: Without dead ends: 51 [2024-10-11 17:45:39,507 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1207 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=546, Invalid=5306, Unknown=0, NotChecked=0, Total=5852 [2024-10-11 17:45:39,507 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 15 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 930 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 930 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-11 17:45:39,507 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 158 Invalid, 944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 930 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-11 17:45:39,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-10-11 17:45:39,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2024-10-11 17:45:39,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.04) internal successors, (52), 50 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:45:39,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2024-10-11 17:45:39,508 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 46 [2024-10-11 17:45:39,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:45:39,508 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2024-10-11 17:45:39,508 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 54 states have (on average 2.5555555555555554) internal successors, (138), 54 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:45:39,508 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2024-10-11 17:45:39,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-10-11 17:45:39,509 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:45:39,509 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:45:39,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-10-11 17:45:39,709 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2024-10-11 17:45:39,709 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-10-11 17:45:39,709 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:45:39,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1106430601, now seen corresponding path program 10 times [2024-10-11 17:45:39,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:45:39,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030730151] [2024-10-11 17:45:39,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:45:39,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:45:39,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:45:40,323 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 85 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:45:40,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:45:40,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030730151] [2024-10-11 17:45:40,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030730151] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:45:40,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579302780] [2024-10-11 17:45:40,323 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-11 17:45:40,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:45:40,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:45:40,325 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:45:40,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-10-11 17:45:40,577 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-11 17:45:40,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 17:45:40,580 INFO L255 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 115 conjuncts are in the unsatisfiable core [2024-10-11 17:45:40,582 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:45:40,800 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-11 17:45:41,164 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 21 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:45:41,164 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:45:41,464 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-10-11 17:45:41,466 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-10-11 17:45:41,785 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 21 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:45:41,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579302780] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:45:41,785 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:45:41,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 56 [2024-10-11 17:45:41,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16466752] [2024-10-11 17:45:41,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:45:41,786 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2024-10-11 17:45:41,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:45:41,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2024-10-11 17:45:41,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=2921, Unknown=0, NotChecked=0, Total=3080 [2024-10-11 17:45:41,787 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand has 56 states, 56 states have (on average 2.4642857142857144) internal successors, (138), 56 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:45:43,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:45:43,311 INFO L93 Difference]: Finished difference Result 84 states and 85 transitions. [2024-10-11 17:45:43,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-10-11 17:45:43,312 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.4642857142857144) internal successors, (138), 56 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2024-10-11 17:45:43,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:45:43,312 INFO L225 Difference]: With dead ends: 84 [2024-10-11 17:45:43,312 INFO L226 Difference]: Without dead ends: 54 [2024-10-11 17:45:43,314 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 951 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=370, Invalid=5950, Unknown=0, NotChecked=0, Total=6320 [2024-10-11 17:45:43,314 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 2 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 1675 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 1691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-10-11 17:45:43,314 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 369 Invalid, 1691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1675 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-10-11 17:45:43,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-10-11 17:45:43,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2024-10-11 17:45:43,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 52 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:45:43,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2024-10-11 17:45:43,316 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 50 [2024-10-11 17:45:43,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:45:43,316 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2024-10-11 17:45:43,316 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.4642857142857144) internal successors, (138), 56 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:45:43,316 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2024-10-11 17:45:43,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-10-11 17:45:43,316 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:45:43,316 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:45:43,332 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-10-11 17:45:43,517 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,16 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:45:43,517 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-10-11 17:45:43,517 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:45:43,517 INFO L85 PathProgramCache]: Analyzing trace with hash -727589884, now seen corresponding path program 11 times [2024-10-11 17:45:43,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:45:43,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419121300] [2024-10-11 17:45:43,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:45:43,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:45:43,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:45:44,215 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 25 proven. 129 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:45:44,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:45:44,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419121300] [2024-10-11 17:45:44,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419121300] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:45:44,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547972508] [2024-10-11 17:45:44,215 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-11 17:45:44,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:45:44,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:45:44,217 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:45:44,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-10-11 17:45:44,409 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-10-11 17:45:44,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 17:45:44,414 INFO L255 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 172 conjuncts are in the unsatisfiable core [2024-10-11 17:45:44,417 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:45:44,452 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-11 17:45:44,460 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-10-11 17:45:44,470 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-10-11 17:45:45,480 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:45:45,480 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:45:46,438 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-11 17:45:46,498 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:45:46,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547972508] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:45:46,499 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:45:46,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 63 [2024-10-11 17:45:46,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542967334] [2024-10-11 17:45:46,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:45:46,499 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2024-10-11 17:45:46,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:45:46,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2024-10-11 17:45:46,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=358, Invalid=3802, Unknown=0, NotChecked=0, Total=4160 [2024-10-11 17:45:46,501 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand has 65 states, 64 states have (on average 2.4375) internal successors, (156), 64 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:45:47,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:45:47,739 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2024-10-11 17:45:47,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-10-11 17:45:47,739 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 64 states have (on average 2.4375) internal successors, (156), 64 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2024-10-11 17:45:47,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:45:47,739 INFO L225 Difference]: With dead ends: 60 [2024-10-11 17:45:47,740 INFO L226 Difference]: Without dead ends: 60 [2024-10-11 17:45:47,740 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1755 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=518, Invalid=5644, Unknown=0, NotChecked=0, Total=6162 [2024-10-11 17:45:47,741 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 8 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 1376 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 1382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-10-11 17:45:47,741 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 215 Invalid, 1382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1376 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-10-11 17:45:47,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-10-11 17:45:47,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 57. [2024-10-11 17:45:47,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.0357142857142858) internal successors, (58), 56 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:45:47,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2024-10-11 17:45:47,742 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 52 [2024-10-11 17:45:47,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:45:47,742 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2024-10-11 17:45:47,742 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 64 states have (on average 2.4375) internal successors, (156), 64 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:45:47,743 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2024-10-11 17:45:47,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-10-11 17:45:47,743 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:45:47,743 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:45:47,758 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-10-11 17:45:47,947 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2024-10-11 17:45:47,948 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-10-11 17:45:47,948 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:45:47,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1198872900, now seen corresponding path program 12 times [2024-10-11 17:45:47,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:45:47,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008051420] [2024-10-11 17:45:47,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:45:47,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:45:47,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:45:48,667 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 113 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:45:48,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:45:48,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008051420] [2024-10-11 17:45:48,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008051420] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:45:48,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053007624] [2024-10-11 17:45:48,667 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-11 17:45:48,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:45:48,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:45:48,672 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:45:48,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-10-11 17:45:49,266 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2024-10-11 17:45:49,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 17:45:49,275 INFO L255 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 86 conjuncts are in the unsatisfiable core [2024-10-11 17:45:49,277 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:45:49,483 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-10-11 17:45:49,780 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 24 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:45:49,781 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:45:49,818 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 15 treesize of output 13 [2024-10-11 17:45:49,820 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-10-11 17:45:49,908 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 24 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:45:49,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053007624] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:45:49,908 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:45:49,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 45 [2024-10-11 17:45:49,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953663367] [2024-10-11 17:45:49,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:45:49,909 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-10-11 17:45:49,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:45:49,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-10-11 17:45:49,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1853, Unknown=0, NotChecked=0, Total=1980 [2024-10-11 17:45:49,910 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 45 states, 45 states have (on average 2.466666666666667) internal successors, (111), 45 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:45:51,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:45:51,108 INFO L93 Difference]: Finished difference Result 94 states and 95 transitions. [2024-10-11 17:45:51,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-10-11 17:45:51,108 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.466666666666667) internal successors, (111), 45 states have internal predecessors, (111), 0 states have call successors, (0), 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 56 [2024-10-11 17:45:51,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:45:51,108 INFO L225 Difference]: With dead ends: 94 [2024-10-11 17:45:51,108 INFO L226 Difference]: Without dead ends: 60 [2024-10-11 17:45:51,109 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=350, Invalid=4620, Unknown=0, NotChecked=0, Total=4970 [2024-10-11 17:45:51,109 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 2 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 1458 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 1479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-11 17:45:51,109 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 319 Invalid, 1479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1458 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-11 17:45:51,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-10-11 17:45:51,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2024-10-11 17:45:51,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 58 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:45:51,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2024-10-11 17:45:51,110 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 56 [2024-10-11 17:45:51,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:45:51,110 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2024-10-11 17:45:51,111 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.466666666666667) internal successors, (111), 45 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:45:51,111 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2024-10-11 17:45:51,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-10-11 17:45:51,111 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:45:51,111 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:45:51,125 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-10-11 17:45:51,315 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,18 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:45:51,315 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-10-11 17:45:51,316 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:45:51,316 INFO L85 PathProgramCache]: Analyzing trace with hash -44470391, now seen corresponding path program 13 times [2024-10-11 17:45:51,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:45:51,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841058023] [2024-10-11 17:45:51,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:45:51,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:45:51,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:45:52,117 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 36 proven. 164 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:45:52,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:45:52,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841058023] [2024-10-11 17:45:52,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841058023] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:45:52,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362336381] [2024-10-11 17:45:52,118 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-11 17:45:52,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:45:52,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:45:52,119 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:45:52,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-10-11 17:45:52,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:45:52,237 INFO L255 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 134 conjuncts are in the unsatisfiable core [2024-10-11 17:45:52,238 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:45:52,268 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-10-11 17:45:52,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-11 17:45:52,271 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-10-11 17:45:53,023 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 49 proven. 151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:45:53,023 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:45:53,916 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-11 17:45:53,959 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 64 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:45:53,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362336381] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:45:53,959 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:45:53,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21, 21] total 65 [2024-10-11 17:45:53,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997520847] [2024-10-11 17:45:53,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:45:53,960 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2024-10-11 17:45:53,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:45:53,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2024-10-11 17:45:53,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=4102, Unknown=0, NotChecked=0, Total=4422 [2024-10-11 17:45:53,961 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand has 67 states, 66 states have (on average 2.6363636363636362) internal successors, (174), 66 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:45:55,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:45:55,002 INFO L93 Difference]: Finished difference Result 63 states and 64 transitions. [2024-10-11 17:45:55,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-10-11 17:45:55,003 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 66 states have (on average 2.6363636363636362) internal successors, (174), 66 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2024-10-11 17:45:55,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:45:55,003 INFO L225 Difference]: With dead ends: 63 [2024-10-11 17:45:55,003 INFO L226 Difference]: Without dead ends: 63 [2024-10-11 17:45:55,004 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1696 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=602, Invalid=6708, Unknown=0, NotChecked=0, Total=7310 [2024-10-11 17:45:55,004 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 3 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 1762 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 1772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-11 17:45:55,004 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 274 Invalid, 1772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1762 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-11 17:45:55,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-10-11 17:45:55,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2024-10-11 17:45:55,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.032258064516129) internal successors, (64), 62 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:45:55,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2024-10-11 17:45:55,006 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 58 [2024-10-11 17:45:55,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:45:55,006 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2024-10-11 17:45:55,006 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 66 states have (on average 2.6363636363636362) internal successors, (174), 66 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:45:55,006 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2024-10-11 17:45:55,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-10-11 17:45:55,007 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:45:55,007 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:45:55,020 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-10-11 17:45:55,210 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-10-11 17:45:55,211 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-10-11 17:45:55,211 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:45:55,211 INFO L85 PathProgramCache]: Analyzing trace with hash -862785599, now seen corresponding path program 14 times [2024-10-11 17:45:55,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:45:55,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928016472] [2024-10-11 17:45:55,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:45:55,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:45:55,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:45:56,098 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 145 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:45:56,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:45:56,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928016472] [2024-10-11 17:45:56,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928016472] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:45:56,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044144272] [2024-10-11 17:45:56,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 17:45:56,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:45:56,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:45:56,100 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:45:56,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-10-11 17:45:56,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 17:45:56,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 17:45:56,248 INFO L255 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 98 conjuncts are in the unsatisfiable core [2024-10-11 17:45:56,249 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:45:56,512 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-10-11 17:45:56,878 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 27 proven. 208 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:45:56,879 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:45:56,918 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-10-11 17:45:56,921 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-10-11 17:45:57,019 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 27 proven. 208 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:45:57,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044144272] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:45:57,020 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:45:57,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 49 [2024-10-11 17:45:57,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366493588] [2024-10-11 17:45:57,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:45:57,020 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-10-11 17:45:57,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:45:57,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-10-11 17:45:57,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=2209, Unknown=0, NotChecked=0, Total=2352 [2024-10-11 17:45:57,021 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand has 49 states, 49 states have (on average 2.510204081632653) internal successors, (123), 49 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:45:58,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:45:58,498 INFO L93 Difference]: Finished difference Result 104 states and 105 transitions. [2024-10-11 17:45:58,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-10-11 17:45:58,498 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.510204081632653) internal successors, (123), 49 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2024-10-11 17:45:58,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:45:58,499 INFO L225 Difference]: With dead ends: 104 [2024-10-11 17:45:58,499 INFO L226 Difference]: Without dead ends: 66 [2024-10-11 17:45:58,499 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 997 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=406, Invalid=5600, Unknown=0, NotChecked=0, Total=6006 [2024-10-11 17:45:58,499 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 2 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 1730 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 1754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-10-11 17:45:58,500 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 377 Invalid, 1754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1730 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-10-11 17:45:58,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-10-11 17:45:58,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2024-10-11 17:45:58,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.03125) internal successors, (66), 64 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:45:58,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2024-10-11 17:45:58,501 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 62 [2024-10-11 17:45:58,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:45:58,501 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2024-10-11 17:45:58,501 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.510204081632653) internal successors, (123), 49 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:45:58,501 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2024-10-11 17:45:58,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-10-11 17:45:58,501 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:45:58,501 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:45:58,518 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-10-11 17:45:58,701 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,20 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:45:58,702 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-10-11 17:45:58,702 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:45:58,702 INFO L85 PathProgramCache]: Analyzing trace with hash -108451122, now seen corresponding path program 15 times [2024-10-11 17:45:58,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:45:58,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384648920] [2024-10-11 17:45:58,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:45:58,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:45:58,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:45:59,512 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 49 proven. 203 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:45:59,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:45:59,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384648920] [2024-10-11 17:45:59,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384648920] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:45:59,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622806491] [2024-10-11 17:45:59,513 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 17:45:59,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:45:59,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:45:59,517 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:45:59,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-10-11 17:45:59,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-10-11 17:45:59,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 17:45:59,872 INFO L255 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 163 conjuncts are in the unsatisfiable core [2024-10-11 17:45:59,875 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:45:59,907 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-10-11 17:45:59,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-11 17:45:59,910 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-10-11 17:46:01,130 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 252 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:46:01,130 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:46:02,349 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-11 17:46:02,407 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 252 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:46:02,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622806491] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:46:02,408 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:46:02,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 75 [2024-10-11 17:46:02,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060976909] [2024-10-11 17:46:02,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:46:02,408 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2024-10-11 17:46:02,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:46:02,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2024-10-11 17:46:02,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=537, Invalid=5315, Unknown=0, NotChecked=0, Total=5852 [2024-10-11 17:46:02,412 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand has 77 states, 76 states have (on average 2.526315789473684) internal successors, (192), 76 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:46:03,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:46:03,803 INFO L93 Difference]: Finished difference Result 72 states and 74 transitions. [2024-10-11 17:46:03,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-10-11 17:46:03,804 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 76 states have (on average 2.526315789473684) internal successors, (192), 76 states have internal predecessors, (192), 0 states have call successors, (0), 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 64 [2024-10-11 17:46:03,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:46:03,804 INFO L225 Difference]: With dead ends: 72 [2024-10-11 17:46:03,804 INFO L226 Difference]: Without dead ends: 72 [2024-10-11 17:46:03,805 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2602 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=780, Invalid=8150, Unknown=0, NotChecked=0, Total=8930 [2024-10-11 17:46:03,808 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 8 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 1755 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 1763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-10-11 17:46:03,809 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 297 Invalid, 1763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1755 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-10-11 17:46:03,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-10-11 17:46:03,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 69. [2024-10-11 17:46:03,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.0294117647058822) internal successors, (70), 68 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:46:03,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2024-10-11 17:46:03,810 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 64 [2024-10-11 17:46:03,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:46:03,810 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2024-10-11 17:46:03,810 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 76 states have (on average 2.526315789473684) internal successors, (192), 76 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:46:03,810 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2024-10-11 17:46:03,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-10-11 17:46:03,811 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:46:03,811 INFO L215 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:46:03,826 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-10-11 17:46:04,011 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-10-11 17:46:04,012 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-10-11 17:46:04,012 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:46:04,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1748598918, now seen corresponding path program 16 times [2024-10-11 17:46:04,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:46:04,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650081164] [2024-10-11 17:46:04,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:46:04,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:46:04,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:46:05,032 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 181 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:46:05,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:46:05,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650081164] [2024-10-11 17:46:05,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650081164] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:46:05,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783336618] [2024-10-11 17:46:05,033 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-11 17:46:05,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:46:05,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:46:05,035 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:46:05,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-10-11 17:46:05,388 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-11 17:46:05,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 17:46:05,397 INFO L255 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 108 conjuncts are in the unsatisfiable core [2024-10-11 17:46:05,402 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:46:05,690 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-10-11 17:46:06,108 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 30 proven. 261 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:46:06,108 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:46:06,151 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-10-11 17:46:06,153 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-10-11 17:46:06,253 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 30 proven. 261 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:46:06,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783336618] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:46:06,253 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:46:06,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 53 [2024-10-11 17:46:06,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180571782] [2024-10-11 17:46:06,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:46:06,254 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2024-10-11 17:46:06,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:46:06,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2024-10-11 17:46:06,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=2596, Unknown=0, NotChecked=0, Total=2756 [2024-10-11 17:46:06,255 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand has 53 states, 53 states have (on average 2.547169811320755) internal successors, (135), 53 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:46:07,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:46:07,944 INFO L93 Difference]: Finished difference Result 114 states and 115 transitions. [2024-10-11 17:46:07,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-10-11 17:46:07,945 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.547169811320755) internal successors, (135), 53 states have internal predecessors, (135), 0 states have call successors, (0), 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 68 [2024-10-11 17:46:07,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:46:07,945 INFO L225 Difference]: With dead ends: 114 [2024-10-11 17:46:07,945 INFO L226 Difference]: Without dead ends: 72 [2024-10-11 17:46:07,946 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1193 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=466, Invalid=6674, Unknown=0, NotChecked=0, Total=7140 [2024-10-11 17:46:07,947 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 2 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 2088 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 2114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 2088 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-10-11 17:46:07,947 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 454 Invalid, 2114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 2088 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-10-11 17:46:07,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-10-11 17:46:07,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2024-10-11 17:46:07,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.0285714285714285) internal successors, (72), 70 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:46:07,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2024-10-11 17:46:07,952 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 68 [2024-10-11 17:46:07,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:46:07,952 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2024-10-11 17:46:07,953 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.547169811320755) internal successors, (135), 53 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:46:07,953 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2024-10-11 17:46:07,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-10-11 17:46:07,953 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:46:07,953 INFO L215 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:46:07,983 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-10-11 17:46:08,153 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-10-11 17:46:08,154 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-10-11 17:46:08,154 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:46:08,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1141407187, now seen corresponding path program 17 times [2024-10-11 17:46:08,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:46:08,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783754649] [2024-10-11 17:46:08,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:46:08,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:46:08,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:46:09,258 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 64 proven. 246 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:46:09,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:46:09,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783754649] [2024-10-11 17:46:09,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783754649] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:46:09,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017939314] [2024-10-11 17:46:09,259 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-11 17:46:09,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:46:09,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:46:09,261 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:46:09,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-10-11 17:46:10,119 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2024-10-11 17:46:10,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 17:46:10,126 INFO L255 TraceCheckSpWp]: Trace formula consists of 530 conjuncts, 177 conjuncts are in the unsatisfiable core [2024-10-11 17:46:10,128 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:46:10,161 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-10-11 17:46:10,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-11 17:46:10,164 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-10-11 17:46:11,649 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:46:11,650 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:46:13,158 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-11 17:46:13,229 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:46:13,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017939314] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:46:13,229 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:46:13,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 28, 28] total 83 [2024-10-11 17:46:13,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670740018] [2024-10-11 17:46:13,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:46:13,230 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2024-10-11 17:46:13,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:46:13,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2024-10-11 17:46:13,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=575, Invalid=6565, Unknown=0, NotChecked=0, Total=7140 [2024-10-11 17:46:13,231 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand has 85 states, 84 states have (on average 2.5) internal successors, (210), 84 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:46:15,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:46:15,053 INFO L93 Difference]: Finished difference Result 78 states and 80 transitions. [2024-10-11 17:46:15,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-10-11 17:46:15,053 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 84 states have (on average 2.5) internal successors, (210), 84 states have internal predecessors, (210), 0 states have call successors, (0), 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 70 [2024-10-11 17:46:15,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:46:15,054 INFO L225 Difference]: With dead ends: 78 [2024-10-11 17:46:15,054 INFO L226 Difference]: Without dead ends: 78 [2024-10-11 17:46:15,054 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3222 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=848, Invalid=10072, Unknown=0, NotChecked=0, Total=10920 [2024-10-11 17:46:15,055 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 7 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 2461 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 2470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 2461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-10-11 17:46:15,055 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 394 Invalid, 2470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 2461 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-10-11 17:46:15,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-10-11 17:46:15,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 75. [2024-10-11 17:46:15,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.027027027027027) internal successors, (76), 74 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:46:15,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2024-10-11 17:46:15,056 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 70 [2024-10-11 17:46:15,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:46:15,056 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2024-10-11 17:46:15,057 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 84 states have (on average 2.5) internal successors, (210), 84 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:46:15,057 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2024-10-11 17:46:15,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-10-11 17:46:15,057 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:46:15,057 INFO L215 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:46:15,072 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-10-11 17:46:15,257 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-10-11 17:46:15,258 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-10-11 17:46:15,258 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:46:15,258 INFO L85 PathProgramCache]: Analyzing trace with hash -316815093, now seen corresponding path program 18 times [2024-10-11 17:46:15,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:46:15,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938522035] [2024-10-11 17:46:15,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:46:15,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:46:15,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:46:16,236 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 221 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:46:16,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:46:16,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938522035] [2024-10-11 17:46:16,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938522035] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:46:16,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611703744] [2024-10-11 17:46:16,237 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-11 17:46:16,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:46:16,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:46:16,238 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:46:16,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-10-11 17:46:18,387 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2024-10-11 17:46:18,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 17:46:18,400 INFO L255 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 122 conjuncts are in the unsatisfiable core [2024-10-11 17:46:18,403 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:46:18,733 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-10-11 17:46:19,177 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 [2024-10-11 17:46:19,214 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 33 proven. 320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:46:19,214 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:46:19,300 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-10-11 17:46:19,301 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-10-11 17:46:19,417 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 33 proven. 320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:46:19,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611703744] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:46:19,418 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:46:19,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 58 [2024-10-11 17:46:19,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848279253] [2024-10-11 17:46:19,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:46:19,418 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2024-10-11 17:46:19,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:46:19,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2024-10-11 17:46:19,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=3125, Unknown=0, NotChecked=0, Total=3306 [2024-10-11 17:46:19,419 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand has 58 states, 58 states have (on average 2.5689655172413794) internal successors, (149), 58 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:46:21,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:46:21,686 INFO L93 Difference]: Finished difference Result 124 states and 125 transitions. [2024-10-11 17:46:21,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-10-11 17:46:21,686 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.5689655172413794) internal successors, (149), 58 states have internal predecessors, (149), 0 states have call successors, (0), 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 74 [2024-10-11 17:46:21,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:46:21,687 INFO L225 Difference]: With dead ends: 124 [2024-10-11 17:46:21,687 INFO L226 Difference]: Without dead ends: 78 [2024-10-11 17:46:21,688 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1425 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=534, Invalid=8022, Unknown=0, NotChecked=0, Total=8556 [2024-10-11 17:46:21,688 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 2 mSDsluCounter, 552 mSDsCounter, 0 mSdLazyCounter, 2691 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 2719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 2691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-10-11 17:46:21,688 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 567 Invalid, 2719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 2691 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-10-11 17:46:21,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-10-11 17:46:21,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2024-10-11 17:46:21,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.0263157894736843) internal successors, (78), 76 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:46:21,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2024-10-11 17:46:21,689 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 74 [2024-10-11 17:46:21,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:46:21,689 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2024-10-11 17:46:21,689 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.5689655172413794) internal successors, (149), 58 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:46:21,690 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2024-10-11 17:46:21,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2024-10-11 17:46:21,690 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:46:21,690 INFO L215 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:46:21,706 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-10-11 17:46:21,894 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-10-11 17:46:21,895 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-10-11 17:46:21,895 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:46:21,895 INFO L85 PathProgramCache]: Analyzing trace with hash -1472538472, now seen corresponding path program 19 times [2024-10-11 17:46:21,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:46:21,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847678206] [2024-10-11 17:46:21,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:46:21,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:46:21,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:46:22,990 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 81 proven. 293 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:46:22,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:46:22,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847678206] [2024-10-11 17:46:22,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847678206] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:46:22,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3843531] [2024-10-11 17:46:22,991 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-11 17:46:22,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:46:22,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:46:22,992 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:46:22,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-10-11 17:46:23,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:46:23,153 INFO L255 TraceCheckSpWp]: Trace formula consists of 574 conjuncts, 173 conjuncts are in the unsatisfiable core [2024-10-11 17:46:23,155 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:46:23,193 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-10-11 17:46:23,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-11 17:46:23,197 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-10-11 17:46:24,343 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 100 proven. 274 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:46:24,343 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:46:25,706 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-11 17:46:25,766 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 121 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:46:25,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3843531] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:46:25,766 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:46:25,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 27, 27] total 83 [2024-10-11 17:46:25,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389285226] [2024-10-11 17:46:25,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:46:25,767 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2024-10-11 17:46:25,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:46:25,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2024-10-11 17:46:25,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=503, Invalid=6637, Unknown=0, NotChecked=0, Total=7140 [2024-10-11 17:46:25,768 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand has 85 states, 84 states have (on average 2.7142857142857144) internal successors, (228), 84 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:46:27,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:46:27,512 INFO L93 Difference]: Finished difference Result 81 states and 82 transitions. [2024-10-11 17:46:27,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-10-11 17:46:27,512 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 84 states have (on average 2.7142857142857144) internal successors, (228), 84 states have internal predecessors, (228), 0 states have call successors, (0), 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 76 [2024-10-11 17:46:27,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:46:27,513 INFO L225 Difference]: With dead ends: 81 [2024-10-11 17:46:27,513 INFO L226 Difference]: Without dead ends: 81 [2024-10-11 17:46:27,514 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2950 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=965, Invalid=11025, Unknown=0, NotChecked=0, Total=11990 [2024-10-11 17:46:27,514 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 4 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 2501 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 2514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 2501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-10-11 17:46:27,515 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 426 Invalid, 2514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 2501 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-10-11 17:46:27,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-10-11 17:46:27,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2024-10-11 17:46:27,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.025) internal successors, (82), 80 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:46:27,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2024-10-11 17:46:27,516 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 76 [2024-10-11 17:46:27,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:46:27,516 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2024-10-11 17:46:27,516 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 84 states have (on average 2.7142857142857144) internal successors, (228), 84 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:46:27,516 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2024-10-11 17:46:27,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2024-10-11 17:46:27,517 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:46:27,517 INFO L215 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:46:27,534 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-10-11 17:46:27,717 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2024-10-11 17:46:27,717 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-10-11 17:46:27,717 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:46:27,718 INFO L85 PathProgramCache]: Analyzing trace with hash -412403376, now seen corresponding path program 20 times [2024-10-11 17:46:27,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:46:27,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209459419] [2024-10-11 17:46:27,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:46:27,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:46:27,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:46:28,961 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 265 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:46:28,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:46:28,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209459419] [2024-10-11 17:46:28,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209459419] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:46:28,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121242680] [2024-10-11 17:46:28,961 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 17:46:28,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:46:28,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:46:28,963 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:46:28,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-10-11 17:46:29,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 17:46:29,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 17:46:29,171 INFO L255 TraceCheckSpWp]: Trace formula consists of 605 conjuncts, 128 conjuncts are in the unsatisfiable core [2024-10-11 17:46:29,174 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:46:29,556 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-10-11 17:46:30,028 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 36 proven. 385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:46:30,028 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 17:46:30,076 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-10-11 17:46:30,078 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-10-11 17:46:30,198 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 36 proven. 385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:46:30,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121242680] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 17:46:30,198 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 17:46:30,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 61 [2024-10-11 17:46:30,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400191799] [2024-10-11 17:46:30,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 17:46:30,199 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2024-10-11 17:46:30,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 17:46:30,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2024-10-11 17:46:30,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=3463, Unknown=0, NotChecked=0, Total=3660 [2024-10-11 17:46:30,200 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand has 61 states, 61 states have (on average 2.6065573770491803) internal successors, (159), 61 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:46:32,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 17:46:32,561 INFO L93 Difference]: Finished difference Result 134 states and 135 transitions. [2024-10-11 17:46:32,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-10-11 17:46:32,561 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.6065573770491803) internal successors, (159), 61 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2024-10-11 17:46:32,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 17:46:32,562 INFO L225 Difference]: With dead ends: 134 [2024-10-11 17:46:32,562 INFO L226 Difference]: Without dead ends: 84 [2024-10-11 17:46:32,563 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1639 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=598, Invalid=9104, Unknown=0, NotChecked=0, Total=9702 [2024-10-11 17:46:32,563 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 3 mSDsluCounter, 580 mSDsCounter, 0 mSdLazyCounter, 2788 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 2821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 2788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-10-11 17:46:32,563 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 596 Invalid, 2821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 2788 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-10-11 17:46:32,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2024-10-11 17:46:32,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2024-10-11 17:46:32,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.024390243902439) internal successors, (84), 82 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:46:32,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2024-10-11 17:46:32,565 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 80 [2024-10-11 17:46:32,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 17:46:32,565 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2024-10-11 17:46:32,565 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.6065573770491803) internal successors, (159), 61 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 17:46:32,565 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2024-10-11 17:46:32,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2024-10-11 17:46:32,566 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 17:46:32,566 INFO L215 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 17:46:32,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-10-11 17:46:32,766 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,26 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:46:32,766 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-10-11 17:46:32,767 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 17:46:32,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1190155491, now seen corresponding path program 21 times [2024-10-11 17:46:32,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 17:46:32,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134220921] [2024-10-11 17:46:32,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 17:46:32,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 17:46:32,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 17:46:33,967 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 100 proven. 344 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:46:33,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 17:46:33,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134220921] [2024-10-11 17:46:33,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134220921] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 17:46:33,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320475671] [2024-10-11 17:46:33,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 17:46:33,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 17:46:33,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 17:46:33,969 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 17:46:33,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-10-11 17:46:35,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2024-10-11 17:46:35,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 17:46:35,850 INFO L255 TraceCheckSpWp]: Trace formula consists of 618 conjuncts, 215 conjuncts are in the unsatisfiable core [2024-10-11 17:46:35,853 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 17:46:35,891 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-10-11 17:46:35,893 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-11 17:46:37,657 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 121 proven. 323 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 17:46:37,657 INFO L311 TraceCheckSpWp]: Computing backward predicates...